SUNNY CENTRAL 500CP XT / 630CP XT / 720CP XT / 760CP XT...

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SCCPXT-IA-D4btf-US-en-22 | 98-104800.01 | Version 2.2 AMERICAN ENGLISH Installation Manual SUNNY CENTRAL 500CP XT / 630CP XT / 720CP XT / 760CP XT / 800CP XT / 850CP XT / 900CP XT

Transcript of SUNNY CENTRAL 500CP XT / 630CP XT / 720CP XT / 760CP XT...

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SCCPXT-IA-D4btf-US-en-22 | 98-104800.01 | Version 2.2 AMERICAN ENGLISH

Installation ManualSUNNY CENTRAL 500CP XT / 630CP XT / 720CP XT / 760CP XT / 800CP XT / 850CP XT / 900CP XT

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Legal Provisions SMA America, LLC

2 SCCPXT-IA-D4btf-US-en-22 Installation Manual

Legal ProvisionsCopyright © 2014 SMA America, LLC. All rights reserved.No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, LLC.Neither SMA America, LLC nor SMA Solar Technology Canada Inc. makes representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America, LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc. nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances.(The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.)Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMA America, LLC and SMA Solar Technology Canada Inc. reserve the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material.All trademarks are recognized even if these are not marked separately. Missing designations do not mean that a product or brand is not a registered trademark.The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by SMA America, LLC and SMA Solar Technology Canada Inc. is under license.

SMA America, LLC3801 N. Havana Street

Denver, CO 80239 U.S.A.

SMA Solar Technology Canada Inc.2425 Matheson Blvd. E

7th FloorMississauga, ON L4W 5K4

Canada

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SMA America, LLC Important Safety Instructions

Installation Manual SCCPXT-IA-D4btf-US-en-22 3

Important Safety InstructionsSAVE THESE INSTRUCTIONSThis manual contains important instructions for the following products:

• SC 500CP-10-XT (Sunny Central 500CP XT)• SC 630CP-10-XT (Sunny Central 630CP XT)• SC 720CP-10-XT (Sunny Central 720CP XT)• SC 760CP-10-XT (Sunny Central 760CP XT)• SC 800CP-10-XT (Sunny Central 800CP XT)• SC 850CP-10-XT (Sunny Central 850CP XT)• SC 900CP-10-XT (Sunny Central 900CP XT)

This manual must be followed during installation and maintenance.

The product is designed and tested in accordance with international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the product. To reduce the risk of personal injury and to ensure the safe installation and operation of the product, you must carefully read and follow all instructions, cautions and warnings in this manual.

Warnings in this documentA warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.Symbol Description

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.NOTICE is used to address practices not related to personal injury.

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Warnings on this product SMA America, LLC

4 SCCPXT-IA-D4btf-US-en-22 Installation Manual

Warnings on this productThe following symbols are used as product markings with the following meanings.Symbol Description

Warning regarding dangerous voltageThe product works with high voltages. All work on the product must only be performed as described in the documentation of the product.Beware of hot surfaceThe product can become hot during operation. Do not touch the product during operation.

Electric arc hazardsThe product has large electrical potential differences between its conductors. Arc flashes can occur through air when high-voltage current flows. Do not work on the product during operation.Risk of fireImproper installation of the product may cause a fire.

Observe the operating instructionsRead the documentation of the product before working on it. Follow all safety precautions and instructions as described in the documentation.

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SMA America, LLC General Warnings

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General Warnings

General WarningsAll electrical installations must be made in accordance with the local and National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1. This document does not and is not intended to replace any local, state, provincial, federal or national laws, regulations or codes applicable to the installation and use of the product, including without limitation applicable electrical safety codes. All installations must conform with the laws, regulations, codes and standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product.Before installing or using the product, read all of the instructions, cautions, and warnings in this manual.Before connecting the product to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel.Wiring of the product must be made by qualified personnel only.

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SMA America, LLC

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SMA America, LLC Table of Contents

Installation Manual SCCPXT-IA-D4btf-US-en-22 7

Table of Contents1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152.3 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182.4 Personal Protective Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182.5 Warning Labels on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3 Scope of Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.1 PV System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.2 Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.2.1 Design of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234.2.2 Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234.2.3 Touch Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244.2.4 Key Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.3 Sunny Central Communication Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.4 Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.5 External Fast Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.6 Grounding Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.7 Low-Temperature Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.8 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 Preparation for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.1 Selecting a Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296.1.1 Requirements for the Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296.1.2 Dimensions of a Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296.1.3 Minimum Clearances for Outdoor Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316.1.4 Minimum Clearances for Installation in Electrical Equipment Rooms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .336.1.5 Requirements for Foundation and Cable Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .356.1.6 Requirements for Cable Routing between MV Transformer and Sunny Central . . . . . . . . . . . . . . . . . . . . . . . .35

6.2 Preparation for Mounting without Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376.2.1 Position of the Mounting Holes on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376.2.2 Drilling Mounting Holes in the Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

6.3 Preparation for Mounting on a Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377 Transporting the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.1 Safety during Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387.2 Center of Gravity of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387.3 Mounting the Kick Plates at the Rear of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397.4 Transporting the Sunny Central Using a Crane Fork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397.5 Transporting the Sunny Central Using a Forklift Truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407.6 Transporting the Sunny Central Using a Pallet Truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417.7 Transporting the Sunny Central Using a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

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Table of Contents SMA America, LLC

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7.7.1 Disassembling the Roof of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .427.7.2 Transporting the Sunny Central Using a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .447.7.3 Mounting the Roof of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

8 Installation of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .468.1 Attaching the Sunny Central without Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468.2 Installing the Sunny Central with Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468.3 Disassembling the Panels on the Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468.4 Removing the Transport Lock from the Inverter Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478.5 Mounting the Ventilation Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9 Grounding Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489.1 Cable and Terminal Lug Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489.2 Connecting the Grounding Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

10 DC Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5010.1 Safety during DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5010.2 DC Connection with DC Fuse Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

10.2.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5110.2.2 Connection Area with DC Fuse Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5210.2.3 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5310.2.4 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5410.2.5 Connecting the SMB Connection Kit to DC Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5410.2.6 Connecting DC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

10.3 DC Connection with DC Busbar Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5610.3.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5610.3.2 Connection Area with DC Busbar Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5610.3.3 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5710.3.4 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5810.3.5 Connecting DC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

11 AC Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6011.1 Safety during AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6011.2 Connecting AC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

11.2.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6111.2.2 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6211.2.3 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6211.2.4 Connecting the AC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

12 Cable Connection of External Devices and Connections in the Interface Cabinet . . . . . . . . . .6412.1 Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6412.2 Leading the Cables into the Interface Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6512.3 Connecting the Cables in the Interface Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

12.3.1 Connecting the Cables to the Connecting Terminal Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6612.3.2 Connecting the Data Cable from the Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6712.3.3 Connecting the Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6712.3.4 Connecting the External Setpoint Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6812.3.5 Connecting the Transformer Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6912.3.6 Connecting the External Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7012.3.7 Connecting the External Fast Stop Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

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13 Setting up a System Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7213.1 Structure of a System Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7213.2 Position of the Communication Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

13.2.1 Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7313.2.2 Setting up a System Network with Optical Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7313.2.3 Setting up a System Network with Copper Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

14 Disconnecting the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7515 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

15.1 Sequence of Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7715.2 Checking the Sunny Central Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7815.3 Checking the Voltages on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

15.3.1 Checking DC Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7815.3.2 Checking the AC Line Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7915.3.3 Checking the Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

15.4 Checking the Grid Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7915.5 Inserting Isolating Blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8015.6 Switching the Voltage Supply and the AC Circuit Breaker On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8115.7 Mounting the Panels and Protective Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8215.8 Important Measures In Case of Non-Utilized Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8315.9 Switching the Sunny Central On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

16 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8417 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

17.1 Sunny Central 500CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8517.2 Sunny Central 630CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8617.3 Sunny Central 720CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8817.4 Sunny Central 760CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9017.5 Sunny Central 800CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9117.6 Sunny Central 850CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9317.7 Sunny Central 900CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

18 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9719 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

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1 Information on this DocumentValidityThis document is valid for the following device types from production version D4:

• SC 500CP-10-XT (Sunny Central 500CP XT)• SC 630CP-10-XT (Sunny Central 630CP XT)• SC 720CP-10-XT (Sunny Central 720CP XT)• SC 760CP-10-XT (Sunny Central 760CP XT)• SC 800CP-10-XT (Sunny Central 800CP XT)• SC 850CP-10-XT (Sunny Central 850CP XT)• SC 900CP-10-XT (Sunny Central 900CP XT)

The production version is indicated on the type label.

Target GroupThis document is intended for qualified persons. Only persons with the appropriate skills are allowed to perform the tasks described in this document (see Section 2.3 "Skills of Qualified Persons", page 18).

Additional InformationLinks to additional information can be found at www.SMA-Solar.com.Document title Document typeInstallation Requirements - Important Information on Transportation and Installation for Sunny Central 500CP XT ⁄ 630CP XT ⁄ 720CP XT ⁄ 760CP XT ⁄ 800CP XT ⁄ 850CP XT ⁄ 900CP XT

Technical Information

Medium-Voltage Transformer - Important Requirements for Medium-Voltage Transformers and Transformers for Auxiliary Power Supply for SUNNY CENTRAL Inverters of the CP XT and CP-JP Production Series

Technical Information

Cable Set ‒ Requirements for and Laying of Cables between Sunny Central CP and Transformer Compact Station

Technical Information

Communit - Communication Distributor for Large-Scale PV Power Plants Technical InformationSunny String-Monitor SSMxx-21 Technical InformationSMA String-Combiner Installation ManualSunny Central Communication Controller ‒ Professional PV System Monitoring for Sunny Central Series CP

Technical Information

High-Altitude Installation ‒ Design of Central Inverters for Mounting Locations exceeding 2,000 m above MSL

Technical Information

Q at Night Technical Information

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Symbols

Typographies

Nomenclature

Symbol ExplanationIndicates a hazardous situation which, if not avoided, will result in death or serious injury

Indicates a hazardous situation which, if not avoided, can result in death or serious injury

Indicates a hazardous situation which, if not avoided, can result in minor or moderate injury

Indicates a situation which, if not avoided, can result in property damage

Information that is important for a specific topic or goal, but is not safety-relevant

Indicates a requirement for meeting a specific goal Desired result A problem that might occur

Typography Use Examplebold • Display messages

• Elements on a user interface• Parameter• Terminals• Slots• Elements to be selected• Elements to be entered

• If the remote shutdown function is not used, set the parameter ExtStrStpEna to Off during commissioning.

Complete designation Designation in this documentSMA America Production, LLC SMASMA Solar Technology Canada Inc. SMASunny Central CP XT Sunny Central or inverterSunny Central Communication Controller SC-COM

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AbbreviationsAbbreviation Designation ExplanationAC Alternating Current ‒DC Direct Current ‒GFDI Ground-Fault Detection Interruption ‒MPP Maximum Power Point ‒MSL Mean Sea Level ‒OF Optical Fiber ‒PC Personal Computer ‒PE Protective Earth Protective conductor PV Photovoltaics ‒

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2 Safety2.1 Intended UseThe Sunny Central is a central inverter which converts the direct current generated in the PV modules into grid-compliant alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the utility grid. The Sunny Central is suitable for outdoor installation provided that the specified safety distances are maintained. The Sunny Central for station installation is suitable exclusively for indoor installation provided that the specified safety distances are maintained. Inverters of the CP XT production series are only licensed for use in connection with a suitable MV transformer and providing that the maximum permissible DC input voltage and the permitted ambient conditions are observed (see Section 17 "Technical Data", page 85). The MV transformer must be designed for the voltages that arise during the pulsed mode of the inverter.The maximum AC voltages can reach the following magnitudes to ground:

• For inverter types SC 500CP XT / 630CP XT / 720CP XT / 760CP XT / 800CP XT, voltages can reach a maximum of ±1,450 V to ground.

• The voltages can reach a maximum of ±1,600 V to ground for the inverter type SC 850CP XT/900CP XT.For detailed information about the requirements of the external MV transformer, consult the technical description "MV Transformer". This description can be found at www.SMA-America.com.

A description of the Disconnect Unit is available at www.SMA-America.com.Do not disconnect or adjust settings that affect grid management services without first obtaining approval from the grid operator.The outdoor version of the inverter corresponds to enclosure type NEMA 3R and is suitable for operation in rain, sleet, and snow.Only use the product in accordance with the information provided in the enclosed documentation. Any other use may cause personal injury or property damage.Only persons fulfilling all of the skills for the target group are permitted to work on or with the Sunny Central.For safety reasons, it is not permitted to modify the product or install components that are not explicitly recommended or distributed by SMA for the product. Unauthorized modifications and installations will void all warranty claims.All work on the Sunny Central must be performed using appropriate tools and in compliance with the ESD protection regulations.Unauthorized persons must not operate the Sunny Central and must be kept at a safe distance from the Sunny Central.The Sunny Central must not be operated with its doors open.The Sunny Central must not be opened when it is raining or when humidity exceeds 95%.The Sunny Central must not be operated with any technical defects.The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for future reference and observe all instructions contained therein.Any use of the Sunny Central other than that described in the Intended Use section is not deemed to be intended use.

According to National Electrical Code® ANSI/NFPA 70, an AC and DC disconnect unit must be installedIn accordance with the National Electrical Code® ANSI/NFPA 70 and the Canadian Electrical Code, the Sunny Central must be installed together with a DC and AC disconnect unit. Therefore, either the SMA Disconnect Unit for DC and AC disconnection or an equivalent solution provided by another manufacturer must be used to meet this requirement.

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2.2 Safety PrecautionsThis section contains safety precautions that must be observed at all times when working on or with the product. To prevent personal injury and property damage and to ensure long-term operation of the product, read this section carefully and follow all safety precautions at all times.

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• Always disconnect the inverter from voltage sources before opening it.• Wear class 1 personal protective equipment.• Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA),

NEC, and NFPA 70E. Do not touch any live components.• Do not touch any live components of the inverter or the medium-voltage grid.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all safety precautions of the module manufacturer.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

Danger to life from electric shock due to live DC cablesDC cables connected to PV modules that are exposed to sunlight carry live voltage. Touching live components results in death or serious injury.

• Wear suitable personal protective equipment for all work on the Sunny Central.• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.

Danger to life from electric shock due to ground faultIf a ground fault has occurred, parts of the PV system that are supposedly grounded may in fact be live. Touching incorrectly grounded components results in death or serious injuries from electric shock.

• Ensure that no voltage is present before touching any components of the PV system.• Wear suitable personal protective equipment for all work on the Sunny Central.

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Danger to life from electric shock when entering the PV fieldThe ground-fault monitoring with GFDI, Remote GFDI or soft grounding does not provide protection from personal injury when GFDI is activated. PV modules which are grounded with GFDI discharge voltage to ground. Entering the PV field can result in lethal electric shocks.

• Configure the PV system as a closed electrical operating area.• Before entering the PV field, switch the PV array to insulated operation.• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .

Danger to life from electric shock if the Sunny Central is damagedOperating a damaged Sunny Central can lead to hazardous situations that result in death or serious injuries due to electric shock.

• Only use the Sunny Central when it is in a technically faultless condition and safe to operate.• Regularly check the Sunny Central for visible damage.• Make sure that all external safety equipment is freely accessible at all times.• Make sure that all safety equipment is in good working order.• Wear suitable personal protective equipment for all work on the Sunny Central.

Danger to life from electric shock even if the Sunny Central is disconnected on both AC and DC sidesThe precharge unit of the option "Q at Night" will carry live voltage even if the AC contactor and the DC switching unit are open. Touching live components of this assembly will result in death or serious injury.

• Do not touch any live components.• Switch the Sunny Central off.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors to

discharge completely.• Ensure that no voltage is present.• Do not remove protective covers.• Observe the warning messages.• Wear personal protective equipment.

Danger to life from electric shock if the Sunny Central is not lockedIf the Sunny Central is not locked, unauthorized persons will have access to live components carrying lethal voltages. Touching live components can result in death or serious injury due to electric shock.

• Always close and lock the Sunny Central.• Remove the keys from the door locks and from the key switch. • Keep keys in a safe place.• Ensure that unauthorized persons do not have access to the PV system.

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Danger to life due to blocked escape routesIn hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two Sunny Central inverters located opposite each other blocks the escape route. It is imperative that the escape route is freely accessible at all times.

• An escape route with a passage width of at least 915 mm (36 in.) must be available at all times. • Do not place any objects in the escape route area.• Remove all tripping hazards from escape routes.• If two Sunny Central inverters have been installed facing each other, never open the doors of both inverters

simultaneously.Risk of fire due to failure to observe torque specifications on live bolted connectionsFailure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire.

• Ensure that live bolted connections are always tightened with the exact torque specified in this document.• Only use suitable tools when working on the device.• Avoid repeated tightening of live bolted connections as this may result in unacceptably high torques.

Risk of burns due to hot componentsSome components of the Sunny Central can get very hot during operation. Touching these components can cause burns.

• Observe the warning messages on the devices.• During operation, do not touch any components marked with such messages.• After disconnecting the PV system from voltage sources, wait until hot components have cooled down sufficiently.• Wear suitable personal protective equipment for all work on the Sunny Central.

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2.3 Skills of Qualified PersonsThe tasks described in this manual must be performed by qualified persons only. Qualified persons must have the following skills:

• Knowledge of how a Sunny Central works and is operated• Training in how to deal with the dangers and risks associated with installing and using electrical devices and systems• Training in the installation and commissioning of electrical devices and systems• Knowledge of all applicable standards and directives• Knowledge of and adherence to this manual and all safety precautions

2.4 Personal Protective Equipment

The following personal protective equipment is regarded by SMA to be the minimum requirement: In a dry environment, safety shoes of category S3 with perforation-proof soles and steel toe caps During precipitation or on moist ground, safety boots of category S5 with perforation-proof soles and steel toe caps Tight-fitting work clothes made of 100% cotton Suitable work pants Individually fitted hearing protection Safety gloves

Any other prescribed protective equipment must also be used.

Damage to the components due to dust intrusion or moisture penetrationDust or moisture penetration can damage the Sunny Central or impair its functionality.

• Do not open the Sunny Central during rainfall or humidity of more than 95%.• Only service the Sunny Central when the environment is dry and free of dust.• Do not operate the Sunny Central with the door open.• Do not connect the external supply voltage before the Sunny Central has been mounted and installed.• Switch on the circuit breaker for external supply voltage. This will activate the heating element and internal fans so

that they can switch on automatically.• If the installation or commissioning process is interrupted, mount all the panels of the Sunny Central.• Close and lock the Sunny Central.

Damage to electronic components due to electrostatic dischargeElectrostatic discharge can damage or destroy electronic components.

• Observe the ESD safety regulations when working on the device.• Wear suitable personal protective equipment for all work on the devices.• Discharge electrostatic charge by touching uncoated, grounded enclosure parts (e.g. near the grounding

connection on the doors). Only then is it safe to touch electronic components.

Always wear suitable protective equipmentWhen working on the Sunny Central, always wear the appropriate personal protective equipment for the specific job.

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2.5 Warning Labels on the Sunny CentralThis section describes the positions of the warning labels on the Sunny Central. The warning messages identify potentially hazardous areas or components. Take note of the warning labels and where they are located prior to working on the Sunny Central.

Figure 1: Position of the labels

Class 1 protective equipment requiredIn accordance to NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Class 1 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. These areas are marked accordingly on the machine, and can only be made accessible after de-energization of the inverter, as described in Section 15 of this manual.For additional information, please contact the SMA Service Line.

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Position SMA order number DesignationA 86-003464 Beware of dangerous voltage*

* Label is only present on inverters shipped to the U.S.

B 86-003464 Beware of dangerous voltage*C 86-029687 Use hearing protectionD 86-05200 Beware of dangerous voltageE 86-79615 Beware of a danger zoneF 86-0043474 Beware of dangerous voltage*G 86-00480020 Beware of dangerous voltage*H 86-10867023 Risk of electric shock from active power sourceI 86-108670106 Risk of burns due to hot fuses under the coverK 86-10867153 Dangerous touch voltage even when device is disconnected

86-0032311 Five safety rules86-003314 Dangerous touch voltage - disconnect the components

L 86-004355 Risk of electric shock from active power sourceM 86-0032311 Five safety rules

86-108670107 The negative terminal in the PV array is grounded in the inverter.N 86-108670108 The positive terminal of the PV array is grounded in the inverter.O 86-10867024 Inadvertent tripping due to modified settingsP 86-0032310 PV system protected by surge arrestersQ 86-108670104 Risk of electric shock from active power sourceR 86-10867035 Wrong connection will destroy the deviceS 86-0099 Position of groundingT 86-108670105 Risk of burns due to hot components under the coverU 86-10867150 Dangerous touch voltage even when device is disconnected

Replacing warning messagesReplace missing or damaged warning messages. These can be ordered from SMA using the SMA order number stated above.

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3 Scope of DeliveryCheck the scope of delivery for completeness and any externally visible damage. Contact your distributor if the scope of delivery is incomplete or damaged.

Figure 2: Components included in the scope of delivery

Position Quantity DesignationA 1 Sunny CentralB 1 Ventilation plateC 5 Kick plateD 1 LV/HRC fuse handle*

* For DC fuse option

E 1 Non-woven abrasiveF 68 BoltG 68 NutH 136 Fender washerI 136 Spring washerK 80 Cable tieL 3 Rubber seal M 1 Installation manual, operating manual, circuit diagram, commissioning report

Position of the LV/HRC fuse handleWith the DC fuse option, the LV/HRC fuse handle is located on the inside right door of the interface cabinet.

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4 Product Description4.1 PV System OverviewThe Sunny Central is a PV inverter which converts the direct current generated in the PV modules into grid-compliant alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the utility grid.A Disconnect Unit can be optionally installed between the inverter and the PV array as well as between the inverter and the MV transformer. This means that the Sunny Central can be disconnected easily and safely whenever necessary.

Figure 3: Principle of a grid-tie PV system with one inverter

Position DesignationA PV arrayB String-Combiner BoxC Sunny CentralD Disconnect Unit*

* optional

E MV transformerF Utility grid

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4.2 Sunny Central4.2.1 Design of the Sunny Central

Figure 4: Sunny Central

The Sunny Central is controlled via the Sunny Central Communication Controller (SC-COM). The grid management service specifications from the grid operator can be implemented via a Power Reducer Box or the Power Plant Controller.

4.2.2 Type LabelThe type label clearly identifies the product. There is one type label present in the Sunny Central. The type label is located in the right-hand top corner at the inside of the interface cabinet.You will require the information on the type label to use the product safely and when seeking customer support from the SMA Service Line. The type labels must be permanently attached to the product.

Position DesignationA Inverter cabinetB Interface cabinetC Touch displayD Service interfaceE Key switch

Reading off the serial numberYou can identify the serial number without opening the Sunny Central. The serial number is located on the Sunny Central on the top left corner of the roof. You can also read off the serial number from the touch display.

Reading off the firmware versionYou can read off the version number of the Sunny Central and touch display firmware via the user interface. You can also read off the version number of the touch display firmware on the touch display.

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Symbols on the ProductAll symbols on the Sunny Central and the type label are explained below.

4.2.3 Touch DisplayDifferent kinds of Sunny Central data can be viewed on the touch display. On the touch display, you cannot set any Sunny Central parameters, but only configure display settings such as language, time and brightness. The display area is activated by touching the touch display. Tapping the symbols on the touch display activates the corresponding functions. If the touch display has not been touched for five minutes, it will switch off.

4.2.4 Key SwitchThe key switch is used to switch the Sunny Central on and off.

Switch position "Start"If the key switch is turned to Start, a motor drive automatically switches the DC switchgear on and the Sunny Central switches from the operating state "Stop" to the operating state "Grid monitoring". If there is sufficient irradiation and a valid utility grid connection, the Sunny Central switches to feed-in operation. If the irradiation level, and therefore the input voltage, is too low, the Sunny Central remains in the operating state "Grid monitoring".

Switch position "Stop"If the key switch is turned to Stop while the Sunny Central is in the operating state "Grid monitoring", a motor drive automatically switches the DC main switch off. The Sunny Central switches to the operating state "Stop".If the key switch is turned to Stop while the Sunny Central is in the operating state "MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once the shutdown is complete, the AC contactor and the DC switchgear are switched off automatically and the Sunny Central switches to the operating state "Stop".

Symbol Designation ExplanationCE marking The product complies with the requirements of the

applicable EU directives.Protection class I All electrical equipment is connected to the protective

conductor system of the product.Degree of protection IP54 The product is protected against interior dust deposits

and splashing water from all angles.Beware of a danger zone This warning symbol highlights a danger zone.

Be particularly vigilant and cautious when working on the product.

Beware of dangerous voltage The product operates at high voltages. All work on the product must be carried out by qualified persons only.

Beware of hot surface The product can get hot during operation. Avoid contact during operation. Allow the product to cool down sufficiently before carrying out any work. Wear personal protective equipment such as safety gloves.

Use hearing protection. The product generates loud noises. When working on the product, wear hearing protection.

Observe the documentation. Observe all documentation supplied with the product.

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4.3 Sunny Central Communication ControllerThe SC-COM is the communication interface between the Sunny Central and the PV system operator.

Figure 5: SC-COM

The SC-COM collects all data from the connected devices. The SC-COM enables monitoring, parameterization and remote diagnosis of the Sunny Central via computer, as well as power control by the grid operator.The various tasks performed by the SC-COM can be organized in two separate networks:

• Monitoring network: this network is used for monitoring, parameterization and remote diagnosis.• Control network: the grid operator uses this network to transmit grid management specifications to the inverters.

The control network is used exclusively for grid management services that need to be transmitted and implemented within a specified time period.

If only a low data transfer rate is required for monitoring the PV system, grid operator specifications can also be transmitted via the monitoring network. Only one network is required in this case.The SC-COM makes all the collected data available to the PV system operator via an Ethernet connection.The networks can be built using copper cables or optical fibers.

Position DesignationA SC-COM

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4.4 Remote ShutdownBy means of remote shutdown, you can selectively shut down and switch off the Sunny Central within approximately six seconds, for example, from a control room. The function of the remote shutdown is similar to the stop function of the key switch. If the remote shutdown function is activated from the control room while the Sunny Central is in the operating state "Grid monitoring", a motor drive automatically shuts off the DC switchgear and the Sunny Central switches to the operating state "Stop".If the remote shutdown function is activated from the control room while the Sunny Central is in the operating state "MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once shutdown is complete, the AC contactor and the DC main switch are switched off automatically and the Sunny Central switches to the operating state "Stop".The remote shutdown is designed as a fail-safe function and must be connected to a 24 V external supply voltage. If 24 V is present in the remote shutdown, the Sunny Central continues to operate in the current operating state. If the remote shutdown is tripped or if a wire break occurs, 0 V is present in the remote shutdown and the Sunny Central switches from its current operating state to the operating state "Stop".In order to be able to use the remote shutdown, the parameter ExlStrStpEna must be set to On.

4.5 External Fast StopThe Sunny Central is equipped ex works with a fast stop input. You have the option of connecting an external switch to this fast stop input which is activated via a 24 V signal .The external fast stop disconnects the Sunny Central from the utility grid in less than 100 ms. The Sunny Central is delivered ex works with open terminals. The following options are available for configuring the external fast stop:

• The external fast stop is deactivated.The terminals of the active fast stop are bridged. The fast stop function is thus deactivated. You will need to bridge the terminals if necessary.

• The external fast stop is operated with internal 24 V supply.An external latching switch (break contact) is connected to the Sunny Central terminals via the internal voltage supply of the Sunny Central. When the switch is closed, the all-or-nothing relay is energized and the Sunny Central feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is stopped and no longer feeds energy into the grid.

• The external fast stop is operated via an external 24 V supply.An external latching switch (break contact) is connected to the Sunny Central terminals via an external 24 V voltage supply. When the switch is closed, the all-or-nothing relay is energized and the Sunny Central feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is stopped and no longer feeds energy into the grid.

Tripping of the fast stop functionThe fast stop function should only be tripped in case of imminent danger. The tripping of the fast stop does not entail rapid discharge of the capacitors. If you wish to use an external signal to switch the Sunny Central off in a controlled manner, you should use the input of the remote shutdown function.

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4.6 Grounding ConceptIn accordance with the latest technology, the Sunny Central inverters are discharged to ground. As a result, leakage currents to ground occur which must be taken into account when planning the PV system. The magnitude and distribution of such leakage currents is influenced by the grounding concept of all the devices in the PV system. SMA therefore recommends that e.g. for use of cameras and monitoring technology, signal transmission is executed in fiber-optic technology (see Section 13.2.2 "Setting up a System Network with Optical Fibers", page 73). This will counteract possible interference sources.SMA recommends grounding the Sunny Central and MV transformers in meshed design to reduce leakage current levels.

4.7 Low-Temperature OptionWith the "Low-temperature option", the temperature range is extended from ‒40°C to +62°C (‒40°F to +144°F); however, the Sunny Central will only maintain feed-in operation down to ‒25°C (‒13°F). If the ambient temperature falls below ‒25°C (‒13°F), the Sunny Central switches to the operating state "Stop", communication is shut down and the auxiliary heating element is activated. As soon as the ambient temperature exceeds ‒20°C (‒4°F), the Sunny Central resumes feed-in operation.

4.8 Schematic DiagramSchematic diagrams in PDF format contain jump marks. By double clicking a jump mark, the display will change to the corresponding current path or the referenced place in the equipment list.SMA recommends using schematic diagrams in PDF format during installation. The schematic diagrams in PDF format are available on request. Contact the SMA Service Line.

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5 StorageIf the Sunny Central is to be stored prior to installation, note the following:

If the supply voltage is not connected during storage, the maximum storage period of the inverter is twelve months.

Damage to the Sunny Central due to moisture penetrationIf the Sunny Central is not stored properly, moisture can penetrate the enclosure and cause damage to electronic components.

• Store the Sunny Central in a closed state.• Store the Sunny Central in a dry and covered location. • The temperature at the storage location must be between ‒25°C and +70°C (‒13°F to +158°F).

Damage to the Sunny Central due to uneven support surfaceStoring the Sunny Central on an unsuitable support surface could damage the frame construction of the Sunny Central. Dust and moisture can penetrate and damage electronic components.

• The support surface must be suitable for the weight of the Sunny Central of 1,900 kg (4,200 lbs.).• The unevenness of the support surface must be less than 0.25%.

Storage in cold temperatures and high humidityIf the Sunny Central is connected to the external voltage supply and the circuit breaker of the supply voltage is switched on during storage, the heating element will activate automatically when humidity is high (see Section 12.3.6 "Connecting the External Supply Voltage", page 70).

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6 Preparation for Installation6.1 Selecting a Mounting Location6.1.1 Requirements for the Mounting Location If the Sunny Central is to be installed in an electrical equipment room, an adequate supply of fresh air must be

ensured. If this is not the case, an additional ventilation system must be installed, e.g. an external fan. The mounting location must be freely accessible at all times. The mounting location must be below the maximum installation altitude (see Section 17 "Technical Data", page 85). The ambient temperature must be within the operating temperature range (see Section 17 "Technical Data", page 85). The mounting location must fulfill the requirements for the ambient conditions (see Technical Information "Installation

Requirements - Important information on transportation and installation for Sunny Central 500CP XT ⁄ 630CP XT ⁄ 720CP XT ⁄ 760CP XT ⁄ 800CP XT ⁄ 850CP XT ⁄ 900CP XT").

6.1.2 Dimensions of a Sunny CentralDimensions of a Sunny Central for Outdoor Installation

Figure 6: Dimensions with roof

Width Height Depth Weight2,562 mm (100.9 in.) 2,272 mm (89.5 in.) 956 mm (37.6 in.) 1,870 kg (4,123 lb.)

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Dimensions of the Sunny Central for Indoor Installation

Figure 7: Dimensions without roof

Width Height Depth Weight2,511 mm(98.8 in.)

2,204 mm(86.8 in.)

910 mm(35.8 in.)

1,835 kg(4,045 lb)

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6.1.3 Minimum Clearances for Outdoor Installation

Observe the following requirements for optimum operation of the Sunny Central: The exhaust air vents must not be obstructed or closed. The electrical equipment room must be equipped with suitable exhaust air vents. In closed rooms, ensure that the exhaust air is ducted out of the room. This will prevent the occurrence of thermal

short circuits. The exhaust air vents must be accessible for cleaning at all times.

Minimum Clearances for One Sunny Central

Figure 8: Minimum clearances for the Sunny Central

Risk of fire due to overheating of cables if different cable lengths are usedCables of differing lengths may cause the cables to overheat. This can result in death or serious injury.

• All line conductors from the Sunny Central to the MV transformer must be of the same length. • The cable length between the connection points must not exceed a maximum of 15 m (590 in.).

Damage to the inverter and the MV transformer due to intake of exhaust airThe induction air is intended to cool the inverter components. Failure to observe the specified minimum clearances can result in warm exhaust air from the inverter being drawn in. This increases the risk of a thermal short circuit. Property damage due to yield loss and damage to the components may result.

• When installing the system, ensure that no exhaust air can be drawn in through the air inlets of the inverter. • When installing the system, ensure that it is not possible for exhaust air from the inverter to be drawn into the air

intake of other devices (e.g. the MV transformer).

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Minimum Clearances for Two Sunny Central Inverters with MV Transformer to be Installed OutdoorsOption 1

Figure 9: Option 1: Minimum clearances for two Sunny Central inverters with MV transformer

Position DesignationA Sunny Central 1B Sunny Central 2C MV transformer and medium-voltage switchgearD Cable route between Sunny Central and MV transformer

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Option 2

Figure 10: Option 2: Minimum clearances for two Sunny Central inverters with MV transformer

6.1.4 Minimum Clearances for Installation in Electrical Equipment Rooms

Danger to life due to blocked escape routesIf the doors of inverters installed opposite each other are opened simultaneously, they may block the escape route in hazardous situations, thus causing death or serious injuries.

• An escape route with a passage width of at least 915 mm (36 in.) must be available at all times.• If two inverters have been installed facing each other, never open the doors of both inverters simultaneously.

Position DesignationA Sunny Central 1B Sunny Central 2C MV transformer and medium-voltage switchgearD Cable route between Sunny Central and MV transformer (15 m (590 in.))

Damage to the Sunny Central and the MV transformer due to intake of exhaust airInverters or MV transformers can overheat and be damaged due to exhaust air from other inverters being drawn in.

• When installing the system, ensure that the Sunny Central cannot draw in any exhaust air. The exhaust air vent is located at the rear of the Sunny Central.

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Minimum Clearances for One Sunny Central Installed in Electrical Equipment RoomsThe minimum passage width of 915 mm (36 in.) between the open door of the Sunny Central and the next fixed obstacle must be complied with.

Figure 11: Minimum clearances for one Sunny Central in an electrical equipment room

Minimum Clearances for Two Sunny Central Inverters Installed in Electrical Equipment Rooms

Figure 12: Minimum clearances for two Sunny Central inverters in an electrical equipment room

Position DesignationA Minimum passage widthB Sunny Central

Danger due to blocked escape routeOpening the doors of two Sunny Central inverters located opposite each other blocks the escape route. It is imperative that the escape route is freely accessible at all times.

• Only open the door of one Sunny Central at a time. • An escape route with a passage width of at least 915 mm (36 in.) must be available at all times.

Position DesignationA Minimum passage widthB Sunny Central

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6.1.5 Requirements for Foundation and Cable ArrangementFoundation requirements Minimum dimensions: 2,800 mm (110 in.) wide, 1,150 mm (54 in.) deep The foundation must be suitable for the weight of the Sunny Central. The unevenness of the foundation must be less than 0.25%. The foundation must have a maximum tilt of 1% to allow rain water to drain away.

Requirements for Enclosure Openings

Openings for the cables must be located in the foundation underneath the interface cabinet.

Empty conduits for the cables must be laid under the foundation. The data cables must be kept separate from the AC and DC

cables. There must be sufficient space available to lay the cables properly.

6.1.6 Requirements for Cable Routing between MV Transformer and Sunny Central

The AC cables must be bundled in the three-phase system. Between the MV transformer and the Sunny Central there must be three separate cable routes for the AC cables,

e.g. cable channels. A line conductor A, B and C must be laid in each cable channel. Ensure that the distance between the cable bundles

is at least double that of the diameter of a cable. This will prevent current imbalances.*

Laying the cablesThis document does not specify at what stage the cables should be laid in the foundation. The stage at which the cables are laid must be determined individually for each PV system.

Risk of fire due to overheating of cables if different cable lengths are usedCables of differing lengths may cause the cables to overheat and catch fire. Death or serious injury due to fire can result.

• All cables used must have sufficient ampacity.• All line conductors from the Sunny Central to the MV transformer must be of the same length.• The cable length between the connection points must not exceed a maximum of 15 m (49 ft.).

* For further information, see Technical Information "Cable Set ‒ Requirements for and Laying of Cables between Sunny Central CP and Transformer Compact Station" at www.SMA-America.com.

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Cable Arrangement for AC Cables Shorter than 2 m (78.7 in.)

Figure 13: Arrangement of AC cables that are shorter than 6 1⁄2 ft. ( ft. (2 m) (example)Arrange the cables as shown in the following figure for all number of cables with a length shorter than 2 m (78.7 in.). The description is exemplary for an arrangement with four cables per line conductor. The distance between the cables should be twice the diameter of a single cable.For AC cable arrangement 1: The distance between the cables should be twice the diameter of a single cable.

Cable Arrangement for AC Cables Longer than 2 m (79 in.)

Figure 14: Arrangement of AC cables with three cables per line conductor (example)Arrange the cables as shown in the following figure for any number of cables shorter than 6 1⁄2 ft. (2 m) long. The description is exemplary for an arrangement with four cables per line conductor. The distance between the cables should be twice the diameter of a single cable.

Figure 15: Arrangement of AC cables with four cables per line conductor (example).

Observe maximum cable lengthThe maximum AC cable length between the Disconnect Unit and the MV transformer must be shorter than 15 m. (49 ft.).

Number of cables per line conductor Arrangement of AC cables3 Arrangement with three cables per line conductor4 If possible: arrangement with four cables per line conductor

Otherwise: arrangement with three cables per line conductor5 Arrangement with three cables per line conductor6 If possible: arrangement with six cables per line conductor

Otherwise: arrangement with three cables per line conductor

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Figure 16: Arrangement of AC cables with 6 cables per line conductor (example).

6.2 Preparation for Mounting without Base6.2.1 Position of the Mounting Holes on the Sunny CentralThe fixtures in the support surface can be prepared prior to installing the Sunny Central.The Sunny Central must be attached to the support surface by means of six bolts. Mounting holes for attaching the inverter to the foundation or the base are located in the inverter floor.

Figure 17: Position of the mounting brackets on the Sunny Central

6.2.2 Drilling Mounting Holes in the Foundation1. Mark the positions of the mounting holes on the foundation corresponding to the mounting brackets.2. Drill mounting holes at the marked positions.

6.3 Preparation for Mounting on a BaseRequirements: Foundation pit and subgrade must be prepared for the installation of the base (see Technical Information "Installation

Requirements ‒ Important Information on Transportation and Installation for Sunny Central 500CP XT ⁄ 630CP XT ⁄ 720CP XT ⁄760CP XT ⁄ 800CP XT ⁄ 850CP XT ⁄ 900CP XT").

The base has been installed by SMA.Procedure:

1. Lead the AC, DC and data cables through the opening into the base. Route the data cables separately from AC and DC cables.

2. Seal the opening, e.g. with expanding foam. This will prevent animals from penetrating the Sunny Central.3. Fill up the excavation pit and level off to ground level.

Position DesignationA Mounting holes for mounting on base or foundationB Mounting holes for mounting on baseC Mounting holes for mounting on foundation

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7 Transporting the Sunny CentralOnce you have taken all the preparatory measures, you can transport the Sunny Central to the mounting location. In this section, you will find information on the transport options recommended by SMA and important points to remember when transporting the Sunny Central.

7.1 Safety during Transport

7.2 Center of Gravity of the Sunny CentralThe center of gravity of the Sunny Central is not in the middle of the Sunny Central. Keep this in mind during transportation of the Sunny Central. The center of gravity of the Sunny Central is marked with the center of gravity symbol on the packaging and the enclosure.

Figure 18: Center of gravity symbol

For installation in an electrical equipment room, comply with the followingIf you are installing the Sunny Central in an electrical equipment room, you must first mount the rear kick plates of the Sunny Central (see Section 7.3, page 39). Once the inverter has been installed, there may no longer be sufficient room for mounting the kick plates.

Danger of crushing through tipping, falling or swaying of raised or suspended Sunny CentralThe Sunny Central can tip or fall as a result of being lifted and transported carelessly or too fast. This can result in death or serious injury.

• Always transport the Sunny Central as close to the ground as possible.• Use all suspension points for transportation.• For transport by crane, use a hoist of adequate lifting capacity for the weight of the Sunny Central of max.

1,900 kg (4,200 lb.).• Avoid fast or jerky movements during transport.• Keep a safe distance from the Sunny Central at all times during transport.• All means of transport used must be designed for the weight of the Sunny Central of 1,900 kg (4,200 lb.).• Always take the center of gravity of the Sunny Central into consideration during transport.• Wear personal protective equipment.• Keep a safe distance from the Sunny Central at all times during transport.

Damage to the Sunny Central due to inappropriate transportPlacing the Sunny Central on uneven surfaces can cause buckling so that the doors will no longer close properly. As a result, moisture and dust can penetrate the interior of the Sunny Central.

• Never place the Sunny Central on an unpaved, uneven surface even for a short period of time.• Do not transport the Sunny Central with mounted kick plates.

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7.3 Mounting the Kick Plates at the Rear of the Sunny CentralIf you are installing the Sunny Central in an electrical equipment room, the kick plates must be attached at the rear of the Sunny Central prior to aligning the Sunny Central on the mounting surface.

Procedure:1. Fasten the grounding cables to the kick plates (torque: 8 Nm (70.8 in-lb.)).2. Put the kick plates into the correct position at the rear of the Sunny Central.3. Attach the kick plates to the Sunny Central using a Torx screwdriver (torque: 2 to 3 Nm (17.7 lbs in to 26.6 lbf in)).

7.4 Transporting the Sunny Central Using a Crane Fork

Requirements: The crane and crane fork must be designed to take the weight of the Sunny Central. The crane fork must be properly coupled to the crane. All kick plates must be removed.

Procedure:1. Move the crane forwards until the crane fork is positioned

underneath the Sunny Central from the front or the rear. Take the center of gravity of the Sunny Central into account and move the crane fork right under the Sunny Central.

2. Slowly raise the crane fork with the Sunny Central.3. Transport the Sunny Central to the mounting location and set down on a suitable surface.

Transport

Transporting the Sunny Central after the rear kick plates are mountedAfter the rear kick plates are mounted, you can no longer transport the Sunny Central with a forklift truck or a crane fork. With mounted rear kick plates, you must use a crane for transportation (see Section 7.7, page 42).

Danger of crushing if the Sunny Central tips overWith the kick plates mounted at the rear of the Sunny Central, the supporting surface of the Sunny Central on the forks of the crane fork is inadequate. Vibrations during transport may cause the Sunny Central to slip off the crane fork and tip over. This can result in death or serious injury.

• Disassemble all kick plates before transporting the inverter using a crane fork.• When the kick plates are mounted, always stabilize the Sunny Central with crane slings or steel chains during

transport.

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7.5 Transporting the Sunny Central Using a Forklift Truck

Requirements: The forklift truck must be designed to take the weight of the Sunny Central. All kick plates must be removed.

Procedure:1. Position the forklift truck under the Sunny Central either from the

front or the rear. Take the center of gravity of the Sunny Central into account and move the forklift truck right under the Sunny Central.

2. Stabilize the Sunny Central using e.g. tension belts. 3. Slightly raise the Sunny Central.4. Transport the Sunny Central to the mounting location and set down on a suitable surface.

Danger of crushing if the Sunny Central tips overWith the kick plates mounted at the rear of the Sunny Central, the supporting surface of the Sunny Central on the forks of the forklift truck is inadequate. Vibrations during transport may cause the Sunny Central to slip off the forklift truck and tip over. This can result in death or serious injury.

• Disassemble all kick plates before transporting the inverter by forklift truck.• When the kick plates are mounted, always stabilize the Sunny Central with crane slings or steel chains during

transport.

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7.6 Transporting the Sunny Central Using a Pallet TruckRequirements: The pallet truck must be designed to take the weight of the Sunny Central. All kick plates must be removed.

Procedure:1. If the Sunny Central is to be transported on a wooden pallet, move

the pallet truck under the Sunny Central from the front or the rear.

2. If the Sunny Central is to be transported without a wooden pallet, the pallet truck must always be moved under the Sunny Central from the side. Ensure that the side panels of the Sunny Central are not damaged by the forks.

3. Slightly raise the Sunny Central.4. Transport the Sunny Central to the mounting location and set down on a suitable surface.

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7.7 Transporting the Sunny Central Using a CraneTo transport the Sunny Central by crane, you will first need to remove the roof.

7.7.1 Disassembling the Roof of the Sunny Central

Procedure:1. Release the screws of the right-hand ventilation grid.

2. Pull the lower side of the right-hand ventilation grid forwards to remove it.

3. Release the screws of the left-hand ventilation grid.

Danger of crushing due to heavy, unwieldy roofThe roof of the Sunny Central is unwieldy and weighs 30 kg (66 lbs.). If you try to move the roof on your own, you run a risk of having limbs crushed.

• Only move the roof with at least two persons.• Wear personal protective equipment.

Property damage due to grounding cables being ripped outThe roof is connected to the Sunny Central by grounding cables. If the roof is not disassembled correctly, the grounding cables may be ripped out.

• Take care not to damage the grounding cables when disassembling the roof.

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4. Pull the lower side of the left-hand ventilation grid forwards to remove it.

5. Pull the front edge of the roof forward and push upward.

6. Gently push the roof to the rear to slide it out of the guide rails.

7. Release the grounding cables from the Sunny Central.

8. Remove the Sunny Central roof and set down on a suitable surface.

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7.7.2 Transporting the Sunny Central Using a CraneRequirements: The crane and hoist must be designed to take the weight of the Sunny Central. The hoist must be properly connected to the crane. The roof of the Sunny Central must be dismantled.

Procedure:1. Attach the hoist to all four lifting eyes in the Sunny Central.2. Raise the crane hook slowly until the hoist is taut.

3. Ensure that the hoist is attached correctly.4. Slightly raise the Sunny Central.5. Transport the Sunny Central as close to the ground as possible.6. Transport the Sunny Central to the mounting location and set down on a suitable surface.

7.7.3 Mounting the Roof of the Sunny Central

Procedure:1. Place the roof on the Sunny Central.2. Screw the grounding cables onto the Sunny Central

(torque: 14.2 Nm (125.7 in-lb.)).

Danger of crushing due to heavy, unwieldy roofThe roof of the Sunny Central is unwieldy and weighs 30 kg (66 lbs.). If you try to move the roof on your own, you run a risk of having limbs crushed.

• Only move the roof with at least two persons.

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3. Slide the roof into the rail on the Sunny Central and pull forwards.

4. Press the roof downwards.

5. Insert the left-hand ventilation grid.

6. Fasten the left-hand ventilation grid (torque: 20 Nm (177.0 in-lb.)).

7. Insert the right-hand ventilation grid.

8. Screw the right-hand ventilation grid on (torque: 20 Nm (177.0 in-lb.)).

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8 Installation of the Sunny CentralDepending on the order option, the Sunny Central can be installed directly on the foundation without a base or attached to the base. You must select the relevant section.

8.1 Attaching the Sunny Central without BaseOnce the Sunny Central has been aligned on the foundation, you can attach it to the foundation using concrete screw anchors and bolts. Requirements: The mounting surface must be prepared for installation (see Section 6.2 "Preparation for Mounting without Base",

page 37). The Sunny Central must be off the pallet.

Additionally required material (not included in the scope of delivery): Four suitable concrete screw anchors

Procedure:• Insert the screw anchors through the brackets on the Sunny Central into the foundation. The exact procedure

depends on the type of screw anchors used.

8.2 Installing the Sunny Central with BaseOnce the Sunny Central has been aligned on the base, you can attach it to the base with bolts. The bolts for attaching the inverter to the base are included in the scope of delivery of the base.Requirements: The base must be prepared for installation (see Section 6.3 "Preparation for Mounting on a Base", page 37). The Sunny Central must be off the pallet.

Procedure:• Insert the screws through the brackets on the Sunny Central into the base and screw tight (torque: 80 Nm (59 ft-lb.)).

8.3 Disassembling the Panels on the Connection AreaThe panels are located at the bottom of the interface cabinet of the Sunny Central.

Procedure:1. Remove the panel screws using a Torx screwdriver (T30). 2. Carefully remove the front panel of the connection area. Pull the panel forwards by approximately 200 mm (8 in.).3. Detach the grounding cable from the rear side of the panel.

Property damage due to grounding cables being ripped outThe panels are connected to the Sunny Central via grounding cables. If the panels are not disassembled correctly, the grounding cables may be ripped out.

• When disassembling the panels, take care not to damage the grounding cables.

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4. Remove the panels.

5. If necessary, remove screws from the protective covers and take the protective covers out of the Sunny Central.

8.4 Removing the Transport Lock from the Inverter Cabinet

Subject to the production version, the three inverter bridges are secured for transport with ESD bubble wrap.Procedure:

1. Open the inverter cabinet.2. Remove the bubble wrap from each of the three inverter bridges.

Be sure to observe all ESD protection measures.

3. Close the inverter cabinet.

8.5 Mounting the Ventilation PlateThe guide rails for the ventilation plate are located in the floor area of the inverter cabinet.Procedure:

• Slide the ventilation plate into the guide rails in the inverter cabinet. The ventilation grid in the ventilation plate should be facing the rear panel. The ventilation plate is flush with the Sunny Central. The ventilation plate will not go all the way in?

• Grip the ventilation plate from underneath and press the middle part upwards while sliding it in.

Damage to electronic components due to electrostatic dischargeElectrostatic discharge can damage or destroy electronic components.

• When working on the Sunny Central or handling assemblies, observe the ESD safety regulations and wear protective gloves.

• Discharge electrostatic charge by touching uncoated, grounded enclosure parts (e.g. near the grounding connection on the doors). Only then is it safe to touch electronic components.

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9 Grounding Connection9.1 Cable and Terminal Lug RequirementsCables: The cable cross-sections of the PE connections depend on the installed overcurrent protective device. Refer to the

National Electrical Code® ANSI/NFPA 70 Article 250.122 for how to calculate the required cross-sections. All cables must be suitable for temperatures of up to +95°C (+203°F) and comply with the National Electrical

Code® ANSI/NFPA 70. Individual cable sizes must be selected in compliance with the National Electrical Code® 310 and must have

sufficient ampacity. The grounding of the PV system must be designed according to the requirements of sections 690.41 to 690.47 of

the National Electrical Code® 70 and is the responsibility of the installer. Use copper or aluminum cables only.Terminal lugs: Use tin-plated terminal lugs only. Only use the nuts, screws and washers included in the scope of delivery for the connection. Always connect two-hole terminal lugs with two screws. The terminal lugs must be designed for temperatures of at least +95°C (+203°F). The width of the terminal lugs must exceed the washer diameter (32 mm) (1.25 in.). This will ensure that the defined

torques are effective over the whole surface.

9.2 Connecting the Grounding Cables

Figure 19: Assembly of the connection for one terminal lug

Equipotential bonding• Ground the Sunny Central in accordance with the applicable regulations.

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Requirement: All cable requirements are complied with. Do not attach more than one grounding cable to the PE connection lug.

Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent

Procedure:1. Insert the grounding cable into the connection area.2. Strip the grounding cable insulation.3. Fit terminal lugs to the grounding cable.4. Wipe the contact surfaces on terminal lugs and the grounding busbar with a clean cloth and ethanol cleaner.

Do not touch the surfaces once they have been cleaned.5. Connect the grounding cable to the grounding busbar in accordance with the circuit diagram. Only use the screws,

washers and nuts included in the scope of delivery (torque: 37 Nm (27.5 ft-lb.)).6. Fasten the grounding cable to the cable support rail. This will ensure that the cable cannot be pulled out

inadvertently.

Position DesignationA NutB Spring washerC Fender washerD BusbarE1 Tin-plated one-hole terminal lugE2 Tin-plated two-hole terminal lugF Screw M12

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10 DC ConnectionDepending on the order option, the DC connection procedure may differ. You must select the relevant section.

10.1 Safety during DC Connection

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• When working in a high contact-risk environment, wear personal protective equipment.• Do not touch any live components.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all safety precautions of the module manufacturer.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

Danger to life from electric shock due to live DC cablesDC cables connected to PV modules that are exposed to sunlight carry live voltage. Touching live components results in death or serious injury.

• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.• Wear suitable personal protective equipment for all work on the Sunny Central.

Danger to life from electric shock due to ground faultIf a ground fault has occurred, parts of the PV system that are supposedly grounded may in fact be live. Touching system components that have not been properly grounded results in death or serious injuries from electric shock.

• Before working on the PV system, ensure that no ground fault is present.• Wear suitable personal protective equipment for all work on the devices.

The insulation monitoring with GFDI, remote GFDI or soft grounding does not provide protection from injury when GFDI is activated. PV modules grounded by GFDI discharge voltage to ground. When entering the PV field, lethal electric shocks may occur.

• Before entering the PV field, switch the PV array to insulated operation.• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .

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10.2 DC Connection with DC Fuse Option10.2.1 Cable and Terminal Lug Requirements

Cables: All cables must be suitable for temperatures of up to +203°F (+95°C) and comply with the National Electrical

Code® ANSI/NFPA 70. Individual cable sizes must be selected in compliance with the National Electrical Code® 310 and must have

sufficient ampacity. Use copper or aluminum cables only. Maximum cable cross-section: 400 mm2 (800 kcml) Connect a maximum of two DC cables to each connection lug.

Terminal lugs: Use tin-plated terminal lugs only. Only use the nuts, screws and washers included in the scope of delivery for the connection. Always connect two-hole terminal lugs with two screws. The terminal lugs must be designed for temperatures of at least +95°C (+203°F). The width of the terminal lugs must exceed the washer diameter (32 mm) (1.25 in.). This will ensure that the defined

torques are effective over the whole surface.

Risk of fire due to failure to observe torque specifications on live bolted connectionsFailure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire.

• Ensure that live bolted connections are always tightened with the exact torque specified in this document.• Only use suitable tools when working on the device.• Avoid repeated tightening of live bolted connections as this may result in unacceptably high torques.

DC-side disconnectionThe DC main distributions and DC sub-distributions should be equipped with circuit breakers. Circuit breakers enable trouble-free DC-side disconnection of the inverter.

Reduced DC input currentsThe DC inputs are fused with LV/HRC size-3 fuses. Comply with DC input current reduction in accordance with the National Electrical Code® 690.8.Fusing Reduced DC current125 A 87.5 A160 A 112.0 A200 A 140.0 A250 A 175.0 A315 A 220.5 A400 A 280.0 A

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10.2.2 Connection Area with DC Fuse Option

Figure 20: Connection area for DC fuses (example)

Position DesignationA Connection bar for grounding cableB Connection lug for DC‒ cableC Connection lug for DC+ cableD Connection lugs for AC cablesE DC connection lug with dimensions

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10.2.3 Connection with One Terminal Lug

Figure 21: Assembly of the connection with terminal lug for terminals with single assignment

Position DesignationA NutB Spring washerC Fender washerD BusbarE1 Tin-plated one-hole terminal lugE2 Tin-plated two-hole terminal lugF Screw M12

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10.2.4 Connection with Two Terminal Lugs

Figure 22: Assembly of the connection with terminal lugs for terminals with double assignment

10.2.5 Connecting the SMB Connection Kit to DC FusesUse the SMB Connection Kit to connect the Sunny Main Box-Cabinet to the Sunny Central. You can only connect the SMB Connection Kit to a Sunny Central with DC fuses. The SMB Connection Kit busbar links three of the Sunny Central DC terminals and allows up to four DC cables to be connected.Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent

Position DesignationA NutB Spring washerC Fender washerD1 Tin-plated one-hole terminal lugD2 Tin-plated two-hole terminal lugE Connection lugF Screw M12

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Procedure:1. Position and screw the busbar firmly over three DC terminals:

• Clean the contact surface using a clean cloth and ethanol cleaning agent.

• Polish the contact surfaces with the non-woven abrasive until they have a light metallic sheen. Ensure that the coated contact surface is not damaged in the process.

• Remove metal dust using a clean cloth and ethanol cleaning agent and do not touch the contact surfaces after cleaning.

• Tighten the busbar using the three screws, nuts and washers supplied (torque: 60 Nm (44.5 ft-lb.).

2. Pull the fuses out of the three DC connection lugs. Use the LV/HRC fuse handle.

10.2.6 Connecting DC Cables

Requirement: All cable requirements are complied with. No more than two DC cables are connected to each fuse input.

Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent

Procedure:1. Insert the DC cables into the connection area.2. Strip the DC cable insulation.3. Fit terminal lugs to the DC cables.4. Wipe the contact surfaces on the terminal lugs and connection lugs with a clean cloth and ethanol cleaner.5. For non-tin-plated busbars, also polish the contact surfaces with non-woven abrasive as follows:

• Polish the contact surfaces with the non-woven abrasive until they have a light metallic sheen. Ensure that the coated contact surfaces are not damaged in the process.

• Remove metal dust using a clean cloth and ethanol cleaning agent and do not touch the contact surfaces again after cleaning.

6. Connect the DC cables with the specified torque in accordance with the circuit diagram. Only use the screws, nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards.

7. Fasten the DC cables to the cable support rail. This will prevent the cables from being pulled out inadvertently.

Danger to life from electric shock due to live DC cablesDC cables connected to PV modules that are exposed to sunlight carry live voltage. Trying to connect live DC cables results in death or serious injury.

• Prior to connecting the DC cables to the Sunny Central, ensure that the DC cables are voltage-free.• Wear suitable personal protective equipment for all work on the Sunny Central.

Type of terminal lug TorqueTin-plated aluminum terminal lug 37 Nm (27.5 ft-lb.)Tin-plated copper terminal lug 60 Nm (44.5 ft-lb.)

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10.3 DC Connection with DC Busbar Option10.3.1 Cable and Terminal Lug RequirementsCables: All cables must be suitable for temperatures of up to +95°C (+203°F) and comply with the National Electrical

Code® ANSI/NFPA 70. Individual cable sizes must be selected in compliance with the National Electrical Code® 310 and must have

sufficient ampacity. Use copper or aluminum cables only. Maximum cable cross-section: 400 mm2 (800 kcmil) Connect a maximum of two DC cables to each connection lug.

Terminal lugs: Use tin-plated terminal lugs only. Only use the nuts, screws and washers included in the scope of delivery for the connection. Always connect two-hole terminal lugs with two screws. The terminal lugs must be designed for temperatures of at least +95°C (+203°F). The width of the terminal lugs must exceed the washer diameter (32 mm) (1.25 in.). This will ensure that the defined

torques are effective over the whole surface.

10.3.2 Connection Area with DC Busbar Option

Figure 23: Dimensions of the DC busbar (example)

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10.3.3 Connection with One Terminal Lug

Figure 24: Assembly of the connection with terminal lug for terminals with single assignment

Position DesignationA Connection bar for grounding cableB Connection lug for DC‒ cableC Connection lug for DC+ cableD Connection lugs for AC cablesE DC connection lug with dimensions

Position DesignationA NutB Spring washerC Fender washerD BusbarE1 Tin-plated one-hole terminal lugE2 Tin-plated two-hole terminal lugF Screw M12

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10.3.4 Connection with Two Terminal Lugs

Figure 25: Assembly of the connection with terminal lugs for terminals with double assignment

Position DesignationA NutB Spring washerC Fender washerD1 Tin-plated one-hole terminal lugD Tin-plated two-hole terminal lugE BusbarF Screw M12

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10.3.5 Connecting DC Cables

Requirements: All cable requirements are complied with. No more than two DC cables are connected to each fuse input.

Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent

Procedure:1. Insert the DC cables into the interface cabinet.2. Strip the DC cable insulation.3. Fit terminal lugs to the DC cables.4. Wipe the contact surfaces on the terminal lugs and connection lugs with a clean cloth and ethanol cleaner.5. Do not touch the contact surfaces again after cleaning.6. Connect the DC cables with the specified torque in accordance with the circuit diagram. Only use the screws,

nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards.

7. Fasten the DC cables to the cable support rail.

Danger to life from electric shock due to live DC cablesDC cables connected to PV modules that are exposed to sunlight carry live voltage. Trying to connect live DC cables results in death or serious injury.

• Prior to connecting the DC cables to the Sunny Central, ensure that the DC cables are voltage-free.• Wear suitable personal protective equipment for all work on the Sunny Central.

Type of terminal lug TorqueTin-plated aluminum terminal lug 37 Nm (27.5 ft-lb.)Tin-plated copper terminal lug 60 Nm (44.5 ft-lb.)

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11 AC ConnectionThe AC outputs are isolated from the enclosure and the system grounding, so that the AC output and neutral are not bonded to ground. If requires by section 250 of the National Electrical Code®, ANSI/NFPA 70, the installer is resposible for this grounding.

11.1 Safety during AC Connection

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the low-voltage and medium-voltage grids. Touching live components results in death or serious injury due to electric shock.

• Always perform work on the Sunny Central in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, NFPA 70E and any locally applicable provisions.

• When working in a high contact-risk environment, wear Class 1 personal protective equipment.• Do not touch any live components.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all locally applicable safety regulations for working on the low-voltage grid and medium-voltage grid.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

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11.2 Connecting AC Cables11.2.1 Cable and Terminal Lug RequirementsCables: All cables must be suitable for temperatures up to +95°C (+203°F) and comply with the National Electrical Code®

ANSI/NFPA 70. Individual cable sizes must be selected in compliance with the National Electrical Code® 310 and must have

sufficient ampacity. Use copper or aluminum cables only. Maximum cable cross-section: 300 mm2 (600 kcmil) AC cables must be designed for maximum voltages of 1,600 V to ground, with a root-mean-square value of 800 V. Use copper or aluminum cables only. Connect a maximum of four AC cables to each connection lug. All cables of the line conductors must be of the same length.

Terminal lugs: Use tin-plated terminal lugs only. Only use the nuts, screws and washers included in the scope of delivery for the connection. Always connect two-hole terminal lugs with two screws. The terminal lugs must be designed for temperatures of at least +95°C (+203°F). The width of the terminal lugs must exceed the washer diameter (32 mm) (1.25 in.). This will ensure that the defined

torques are effective over the whole surface.

Fire hazard due to differing cable lengthsDiffering cable lengths cause overheating. As a result, components may catch fire.

• The cables of the individual line conductors must be of the same length.Risk of fire due to failure to observe torque specifications on live bolted connectionsFailure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase. This can cause components to overheat and catch fire.

• Only use the nuts, screws and washers included in the scope of delivery.• Ensure that live bolted connections are always tightened with the exact torque specified in this document.

– For connections of tin-plated aluminum terminal lugs, observe a torque of 37 Nm (27.5 ft-lb.).– For connections of tin-plated copper terminal lugs, observe a torque of 60 Nm (44.5 ft-lb.).

• Only use suitable tools when working on the device.• Avoid repeated tightening of live bolted connections as this may result in unacceptably high torques.

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11.2.2 Connection with One Terminal Lug

Figure 26: Assembly of the connection with terminal lug for terminals with single assignment

11.2.3 Connection with Two Terminal Lugs

Figure 27: Assembly of the connection with terminal lugs for terminals with double assignment

Position DesignationA NutB Spring washerC Fender washerD Connection busbarE1 Tin-plated one-hole terminal lugF Screw M12

Position DesignationA NutB Spring washerC Fender washer

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11.2.4 Connecting the AC Cables

Figure 28: Dimensions of the AC connection lugsRequirement: All cable requirements are complied with. All cables are laid according to the specifications (see Section 6.1.6 "Requirements for Cable Routing between MV

Transformer and Sunny Central", page 35). The AC cables must be prepared for the connection.

Additionally required mounting material (not included in the scope of delivery): Clean cloth Ethanol cleaning agent

Procedure:1. Insert the AC cables into the connection area.2. Strip the AC cable insulation.3. Fit the AC cables with terminal lugs.4. Clean the contact surfaces using a clean cloth and ethanol cleaning agent.5. Polish the contact surfaces with the non-woven abrasive until they have a light metallic sheen. Ensure that the coated

contact surfaces are not damaged in the process.6. Remove metal dust using a clean cloth and ethanol cleaning agent and do not touch the contact surfaces again after

cleaning.7. Connect the AC cables with the specified torque in accordance with the circuit diagram. Only use the screws,

nuts and washers included in the scope of delivery and make sure that the screw heads always point forwards.

8. Attach the AC cables to the cable support rail. This will prevent the cables from being pulled out inadvertently.9. If you do not wish to continue with installation work at present, close the Sunny Central (see Section 15.7 "Mounting

the Panels and Protective Covers", page 82).

D1 Tin-plated one-hole terminal lugE Connection busbarF Screw M12

Type of terminal lug TorqueTin-plated aluminum terminal lug 37 Nm (27.5 ft-lb.)Tin-plated copper terminal lug 60 Nm (44.5 ft-lb.)

Position Designation

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12 Cable Connection of External Devices and Connections in the Interface Cabinet

The connection of external devices depends on the project configuration. You must select the relevant section. Note that for unused functions such as remote shutdown or transformer protection, the parameter settings must be checked and changed, if necessary.

12.1 Connection Area

Figure 29: Terminals in the interface cabinet

Position DesignationA Customer connection terminalsB Cable support railC Sealing plate with cable support sleeves

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12.2 Leading the Cables into the Interface Cabinet1. Remove the four screws at the top of the sealing plate.

2. Remove the sealing plate.3. Release the three screws at the side of the sealing plate.

4. Remove the required cable support sleeves from the sealing plate. Make sure that the diameter of the cable support sleeves corresponds to the diameter of the cables to be inserted. Use the additional cable support sleeves included in the scope of delivery, if necessary.

5. Remove the sealing plugs from the cable support sleeves.6. Insert the cables through the cable support sleeves.7. Insert the cable support sleeves into the sealing plate without deforming them. This will guarantee a tight fit.8. Tighten the screws at the side of the sealing plate.9. Screw the sealing plate to the floor of the interface cabinet.

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12.3 Connecting the Cables in the Interface Cabinet12.3.1 Connecting the Cables to the Connecting Terminal Plate

1. Dismantle 60 mm (2.4 in.) of the cable.2. Strip 5 mm (0.2 in.) off the conductor insulation.

3. Connect the cable in accordance with the circuit diagram.• Remove the connection plug from the base terminal.

• Insert the screwdriver into the square opening of the connection plug. This will release the opening of the connection plug for the insulated conductors.

• Insert the insulated conductors of the cable into the connection plug, as shown in the circuit diagram.

• Remove the screwdriver from the connection plug.• Plug the connection plug into the base terminal.

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12.3.2 Connecting the Data Cable from the Sunny String-MonitorThe data cable for the RS485 communication and the +55 VDC voltage supply links the Sunny String-Monitor to the Sunny Central.For an optimum voltage supply, SMA recommends connecting two insulated conductors each with a cross-section of 0.5 mm2 (21 AWG) to one voltage supply terminal. You can connect two insulated conductors to one terminal for the GND_EXT signal in just the same way.Recommended cable type: Li2YCYv (TP) 4 x 2 x 0.5 mm2 (4 x 2 x 21 AWG). Cable requirement: The voltage supply and the communication connection must be combined in one cable. The cable must be shielded.

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the Sunny String-Monitor cable into the interface cabinet (see Section 12.2 "Leading the Cables into the

Interface Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66).3. Remove the shield clamping saddle from the busbar.4. Press the shield clamping saddle down onto the shield of the

stripped cable until it clicks into place, and fasten hand-tight.

5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out inadvertently.

12.3.3 Connecting the Remote Shutdown.The remote shutdown enables the Sunny Central to be switched off from a distance, e.g. from a control room. The function of the remote shutdown is similar to the stop function of the key switch.

Cable requirement: The cable must be shielded.

Supply voltage shortfallIf the supply voltage at the remote shutdown unit is between 18.5 V and 24.0 V, the Sunny Central will continue to operate in its current operating state. If the supply voltage at the remote shutdown unit falls below 18.5 V, the Sunny Central switches from the current operating state to the operating state "Stop".

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Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the remote shutdown cable into the interface cabinet (see Section 12.2 "Leading the Cables into the Interface

Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66).3. Remove the shield clamping saddle from the busbar.4. Press the shield clamping saddle down onto the shield of the

stripped cable until it clicks into place and fasten hand-tight.

5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out inadvertently.

12.3.4 Connecting the External Setpoint Specification

You will find further information on how the external setpoint specification works in the Sunny Central operating manual.Cable requirement: The cable must be shielded.

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the external setpoint cable into the interface cabinet (see Section 12.2 "Leading the Cables into the Interface

Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66).3. Remove the shield clamping saddle from the busbar.

Signal transmissionExternal setpoints for reactive and active power are normally specified by the grid operator, e.g. via a ripple control signal. The Power Reducer Box or the Power Plant Controller receives the setpoints from the ripple control receiver and sends these to the Sunny Central. The Sunny Central applies the specifications of the grid operator and feeds, for example, a specified amount of reactive power into the utility grid. Ask your grid operator which type of signal transmission is used.If these setpoints are not transmitted via the Power Reducer Box or the Power Plant Controller, there are terminals located in the Sunny Central for connecting the external setpoints. The Sunny Central processes analog standard signals of 4 mA to 20 mA.

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4. Press the shield clamping saddle down onto the shield of the stripped cable until it clicks into place and fasten hand-tight.

5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out inadvertently.

12.3.5 Connecting the Transformer ProtectionThe Sunny Central is equipped with a terminal for monitoring the MV transformer which switches the Sunny Central off immediately under fault conditions. To use the transformer monitoring, an external voltage supply of 230 V/50 Hz must be provided in the MV transformer.Cable requirement: The cable must be shielded.

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the transformer protection cable into the interface cabinet (see Section 12.2 "Leading the Cables into the

Interface Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66).3. Remove the shield clamping saddle from the busbar.4. Press the shield clamping saddle down onto the shield of the

stripped cable until it clicks into place and fasten hand-tight.

5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out inadvertently.

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12.3.6 Connecting the External Supply VoltageThe Sunny Central draws electricity for its internal power supply from the external supply voltage. The Sunny Central must be connected to an external, three-phase supply voltage with 230 V line voltage/400 V line-to-line voltage (3/N/PE) per phase.

Cable requirement: The cable used must be shielded. Maximum conductor cross-section: 4 mm2 (11 AWG)

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Lead the external voltage supply cable into the interface cabinet (see Section 12.2 "Leading the Cables into the

Interface Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66).3. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out

inadvertently.

12.3.7 Connecting the External Fast Stop CablingIf required, you can connect an external fast stop according to the circuit diagram. The fast stop can be operated by means of an internal or external voltage supply.

Cable requirements: The cable must be shielded.

Damage to the Sunny Central due to incorrect connection of internal power supply• Connect the neutral conductor N.• Ground the neutral point of the transformer for auxiliary power supply.

Circuit breaker between the external voltage supply and the Sunny CentralA type-B circuit breaker with a rated current of 16 A is installed in the Sunny Central.

• Provide a selective circuit breaker to protect the cable to the Sunny Central.

Cut the grounding conductor to the correct lengthThe grounding conductor must be cut to size and connected so that in case of excessive tensile load, the grounding conductor will only pull out after the live conductors.

• Provide sufficient excess length for the grounding conductor.

Shortfall of external supply voltageIf an external supply voltage of between 18.5 V and 24.0 V is supplied to the external fast stop, the Sunny Central will continue to operate in its current operating state. If the external supply voltage to the external fast stop falls below 18.5 V, the Sunny Central switches from the current operating state to the operating state "Stop". If the temperature in the interior of the Sunny Central exceeds +60°C (+140°F), the external fast stop must be supplied with a supply voltage between 20.0 V and 24.0 V to continue operating the Sunny Central in its current operating state.

• Ensure that the external fast stop is supplied with a constant external voltage between 20.0 V and 24.0 V.

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Cable requirements for internal voltage supply: The cable must be shielded. Maximum cable length with cable cross-section of 2.5 mm2 (14 AWG): 130 m (426 ft.) Maximum cable length with cable cross-section of 1.5 mm2 (16 AWG): 80 m (263 ft.)

Requirements: The Sunny Central must be disconnected (see Section 14, page 75). Use latching switches only.

Procedure:1. Insert the cable of the external fast stop into the interface cabinet (see Section 12.2 "Leading the Cables into the

Interface Cabinet", page 65).2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1 "Connecting the Cables to the

Connecting Terminal Plate", page 66). 3. Remove the shield clamping saddle from the busbar.4. Press the shield clamping saddle down onto the shield of the

stripped cable until it clicks into place and fasten hand-tight.

5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out inadvertently.

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13 Setting up a System Network13.1 Structure of a System NetworkIn order to connect the Sunny Central to a computer via the service interface or via the Internet, the communication must be set up in a PV system network. If you connect the Sunny Central permanently to the Internet, it will be able to transmit data to Sunny Portal automatically.

Figure 30: Basic structure of large-scale system networks

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13.2 Position of the Communication Terminals13.2.1 Connection Area

Figure 31: Position of the communication terminals

13.2.2 Setting up a System Network with Optical Fibers

Depending on the order option, you can integrate the Sunny Central into the PV system network with optical fibers. In this case, the Sunny Central is equipped with an integrated splice box. The splice box features an SC-P plug to which the optical fibers can be connected directly.There are two ways of connecting the optical fibers to the SC-P plug:

• Connection of optical fibers via SC plug• Connection of optical fibers via optical fiber pigtail

Position Quantity DesignationA 1 Splice box*

* optional

B 2 Network terminal for network port

Damage to optical fibers due to too tight bend radiiOverly bending or kinking the optical fibers will damage the glass fiber.

• Observe the minimum permissible bend radii of the optical fibers.

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Connection of Optical Fibers via SC PlugAdditionally required mounting material (not included in the scope of delivery): SC plug

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the optical fibers into the interface cabinet of the Sunny Central (see Section 12.2, page 65).2. Fit the SC plugs to the optical fibers.3. Plug the SC plugs into the SC-P plugs in the splice box.

Connection of Optical Fibers via Optical Fiber PigtailOptical fiber pigtail requirements: The cable must be equipped with a 50 μm multi-mode optical fiber. The cable must be fitted with an SC plug.

Additionally required mounting material (not included in the scope of delivery): Optical fiber pigtail according to the specifications

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the optical fibers into the interface cabinet of the Sunny Central.2. Splice the optical fibers with the optical fiber pigtails in the splice box.3. Plug the SC plugs into the SC-P plugs in the splice box.4. Attach the optical fibers to the cable support rail using a cable tie. This ensures that the optical fibers cannot be pulled

out inadvertently.5. If you do not wish to continue installation work or commission the Sunny Central immediately, close the

Sunny Central (see Section 15.7, page 82).

13.2.3 Setting up a System Network with Copper CablesThe Sunny Central can be integrated into the system network using a copper cable.Requirements for the network cable: The cable must be shielded and pair-twisted. The cable must be at least of category 5 (CAT 5). Maximum cable length: 100 m (328 ft.)

Requirement: The Sunny Central must be disconnected (see Section 14, page 75).

Procedure:1. Insert the network cable into the interface cabinet (see Section 12.2, page 65).2. Plug the network cable into the network socket in the interface cabinet.3. Attach the network cable to the cable support rail using a cable tie. This ensures that the network cable cannot be

pulled out inadvertently.4. If you do not wish to continue installation work or commission the Sunny Central immediately, close the

Sunny Central (see Section 15.7, page 82).

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14 Disconnecting the Sunny CentralBefore working on the Sunny Central, always disconnect the Sunny Central from all voltage sources as described in this section.

Procedure:1. Switch the key switch of the Sunny Central to Stop.2. Wait 15 minutes. This allows the capacitors to discharge.

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• Always perform work on the Sunny Central in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, NFPA 70E and any locally applicable provisions.

• When working in a high contact-risk environment, wear personal protective equipment.• Do not touch any live components.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all safety precautions of the module manufacturer.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

Danger to life from electric shock due to ground faultIf a ground fault has occurred, parts of the PV system that are supposedly grounded may in fact be live. Touching incorrectly grounded components results in death or serious injuries from electric shock.

• Ensure that no voltage is present before touching any components.• Wear suitable personal protective equipment for all work on the Sunny Central.

The insulation monitoring with GFDI, remote GFDI or soft grounding does not provide protection from injury when GFDI is activated. PV modules which are grounded with GFDI discharge voltage to ground. Entering the PV field can result in lethal electric shocks.

• Before entering the PV field, switch the PV modules to insulated operation.• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .

Connecting and disconnecting the AC voltage of the MV transformerOnly a duly authorized person trained in electrical safety is allowed to connect and disconnect the AC voltage of the MV transformer.

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3. Disconnect the external AC voltage of the MV transformer.4. Disconnect the DC voltage in the main distribution (e.g. Sunny Main Box) or the sub-distribution

(e.g. Sunny String-Monitor).5. Open the door of the interface cabinet.6. Switch off the AC circuit breaker in the inverter.7. Disconnect the external supply voltage externally.8. Disconnect any additional external voltage.9. Switch off the circuit breaker of the external supply voltage and

disconnect the internal transformer for auxiliary power supply if applicable.

10. Switch off the motor-protective circuit-breaker of the grid monitoring.

11. Open the test and disconnect terminals.

12. Ensure that all poles are free of voltage.13. Ground and short-circuit the inverter.14. Cover or isolate any adjacent live components.15. Unscrew the protective cover over the fuses.16. Remove all fuses and isolating blades from all fuse holders.

Use the LV/HRC fuse handle.

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15 Commissioning15.1 Sequence of Commissioning

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• Always perform work on the Sunny Central in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, NFPA 70E and any locally applicable provisions.

• When working in a high contact-risk environment, wear Class 1 personal protective equipment.• Do not touch any live components.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all safety precautions of the module manufacturer.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

Statutory warranty or guarantee claimsWarranty or guarantee claims can only be asserted providing that the initial start-up was carried out by SMA or that the fully completed and signed "Commissioning Report for Sunny Central PV Systems" is on file at SMA.

Connecting and disconnecting the AC voltage of the MV transformerOnly a duly authorized person trained in electrical safety is allowed to connect and disconnect the AC voltage of the MV transformer.

Procedure See 1. Check the Sunny Central cabling Section 15.2, page 78 2. Commission the DC sub-distribution, e.g. Sunny String-Monitor DC sub-distribution

documentation3. If applicable, commission the DC main distribution, e.g. Sunny Main Box. DC main distribution

documentation4. Check the DC voltages Section 15.3.1, page 785. Insert fuses or isolating blades Section 15.5, page 80

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15.2 Checking the Sunny Central Cabling

Procedure:1. Ensure that all connections are executed in accordance with the circuit diagram.2. If no external fast stop is to be installed, ensure that the terminals are wired with a jumper according to the circuit

diagram.3. Make sure that the AC, DC, and grounding conductor terminals are securely connected.4. Ensure that there is equipotential bonding between the Sunny Central and the mounting location.5. Ensure that all terminals in the interface cabinet are securely in place.

15.3 Checking the Voltages on the Sunny Central15.3.1 Checking DC Voltages

6. Connect the external AC voltage of the MV transformer (to be performed by duly authorized persons trained in electrical safety only)

MV transformer documentation

7. Check the AC line voltage Section 15.3.2, page 798. Check the internal power supply Section 15.3.3, page 799. Check the grid monitoring Section 15.4, page 79

10. Switch on the voltage supply and AC circuit breaker Section 15.6, page 8111. Mount the panels and protective covers Section 15.7, page 8212. Switch the Sunny Central on Section 15.9, page 83

Danger to life from electric shock due to live DC cablesDC cables connected to PV modules that are exposed to sunlight carry live voltage. Trying to connect live DC cables results in death or serious injury.

• Prior to connecting the DC cables to the Sunny Central, ensure that the DC cables are voltage-free.• Wear suitable personal protective equipment for all work on the Sunny Central.

Danger to life due to electric arcs if the multimeter is not connected correctlyContacting the measurement points incorrectly can cause an electric arc. Electric arcs may result in death or serious injury.

• Select the appropriate measurement range on the multimeter.• Wear personal protective equipment.• Select the correct measurement points.

Damage to the Sunny Central due to high DC voltagesThe DC voltage of the PV array must not exceed the maximum voltage of the Sunny Central.

• VPV = 1,000 V

Procedure See

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Procedure:1. Measure the DC voltage for each input and record it in the commissioning report. Use the DC+ and DC‒ connection

lugs as measuring points.2. Check that the DC voltages do not exceed the maximum DC voltage of the Sunny Central.

If the DC voltages differ from one another or exceed the maximum DC voltage, make sure that the cabling of the PV modules has been configured according to the circuit diagram.

3. Make sure that the polarity of each input is correct.4. Measure the DC voltage for each non-grounded pole to ground and record in the commissioning report. Use the

connection lugs of the ungrounded terminal and the grounding busbar as measuring points. Voltage drop can be measured. Voltage drop cannot be measured?

A ground fault is present.• Eliminate the ground fault.

15.3.2 Checking the AC Line Voltage1. Using a rotating field instrument, measure whether a right-rotating magnetic field is connected at the AC connection

lugs. If a left-rotating magnetic field is connected, two line conductors have been incorrectly connected.• Swap over the connections of the line conductors A and C.

2. Check whether the AC voltage is approximately the same as the nominal voltage of the Sunny Central. Measure the AC voltage between the terminals at the AC connection lugs and record in the commissioning report.If the AC voltage differs significantly from the nominal voltage of the Sunny Central, the transformation ratio of the MV transformer must be adjusted by a duly authorized person.

15.3.3 Checking the Supply Voltage1. Using the rotating field instrument, measure to establish whether a right-rotating magnetic field is connected at the

supply voltage circuit breaker. Use the measuring points on the circuit breaker of the supply voltage. If a left-rotating magnetic field is connected, two line conductors have been incorrectly connected.• Swap over the connections of the line conductors A and C.

2. Measure the AC voltages between the terminals on the circuit breaker of the supply voltage and record the values in the commissioning report. Use the measuring points on the circuit breaker of the supply voltage.

The voltage between the line conductors is in the range 360 V to 460 V. The voltage between line conductor and neutral conductor or grounding conductor is in the range 207 V to 264 V. The voltage between grounding conductor and neutral conductor is 0 V.

15.4 Checking the Grid Monitoring

Additionally material required for tests: 1 function generator

Parameters for grid monitoringThe Sunny Central is supplied with the grid monitoring parameters set according to the requirements in the respective country.The grid operator may request settings of the grid monitoring parameters which differ from these default settings. Grid monitoring parameters can be adjusted via the user interface. Details of how to adjust the grid monitoring parameters can be found in the Sunny Central operating manual.

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Procedure:1. Ensure that the motor-protective circuit-breaker of the grid monitoring is switched off.2. Open the test and disconnect terminals.

3. Connect the function generator to the test and disconnect terminals (see function generator manual).4. Check the limiting values set for the grid monitoring parameters:

• Use the function generator to create a simulated line voltage for the Sunny Central. Always observe the nominal AC voltage of the Sunny Central:

• Record the configured limiting values for the grid monitoring parameters in the commissioning report.5. Disconnect the function generator from the test and disconnect terminals.

15.5 Inserting Isolating Blades

Procedure:1. If you are using an SMB Connection Kit, insert isolating blades.

Use an LV/HRC fuse handle.

Screw the protective cover over the fuses.

Inverter type Nominal AC voltageSC-500CP XT 270 VSC-630CP XT 315 VSC-720CP XT 324 VSC-760CP XT 342 VSC-800CP XT 360 VSC-850CP XT 386 VSC-900CP XT 405 V

Replace LV/HRC size 3 fuses with isolating bladesIf you are using the Sunny Central with the SMB Connection Kit, you will need to replace the extracted LV/HRC size 3 fuses at the respective fuse inputs with isolating blades.

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15.6 Switching the Voltage Supply and the AC Circuit Breaker On1. Close the test and disconnect terminals.

2. Switch on the motor-protective circuit-breaker of the grid monitoring. The electronic components of the Sunny Central switch on. The fans switch on and start drawing air in through the air

intake vents. The fans do not switch on?

• Contact the SMA Service Line.

3. Switch the AC circuit breaker on.

4. Switch the supply voltage circuit breaker on.

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15.7 Mounting the Panels and Protective Covers

Figure 32: Position of the protective covers in the Sunny Central

Procedure:1. Attach all cables to the cable support rail using cable ties.2. Tighten all protective covers (torque: 5 Nm (44.3 in-lb.)).3. Fasten the grounding cables to the panels of the interface cabinet and the kick plates (torque: 8 Nm to 10 Nm)

(70.8 in-lb. to 88.5 in-lb.)).4. Ensure that the grounding cables are securely in place.5. Attach the panels at the prescribed positions.

6. Attach the panels to the Sunny Central using a Torx screwdriver (torque: 2 Nm to 3 Nm (17.7 in-lb. to 26.6 in-lb.)).

Position DesignationA Protective cover

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15.8 Important Measures In Case of Non-Utilized OptionsUnused Remote Shutdown

• If you are not using the remote shutdown option, set the parameter ExtStrStpEna to Off after commissioning (see operating manual).

Unused Transformer Protection• If you are not using the transformer protection option, set the parameter ExtTrfErrEna to Off after commissioning

(see operating manual).

15.9 Switching the Sunny Central On

Requirements: All electrical connections made on site are properly connected and firmly in place. The entire electrical installation, including the PV system, has been tested by the plant builder in accordance with the

applicable standards. A test protocol of the tests carried out has been compiled in accordance with the applicable standards. Additional tests have been carried out if a medium-voltage switchgear is present. The ground resistance of the PV system has been determined. All values measured are within the permissible range. The Sunny Central doors are closed.

Procedure:1. Lock the Sunny Central.2. Turn the key switch to Start.

The DC switch switches on with an audible click. If there is sufficient irradiation, the Sunny Central will start feeding into the utility grid. Error on the touch display?

• Eliminate the error (see the Sunny Central operating manual).

Danger to life through electric shock in the event of improper use or unauthorized opening of the Sunny CentralHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• Do not operate the Sunny Central with the door open.• Remove the keys from the door locks of the Sunny Central.• Keep the keys in a safe place.

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16 Decommissioning

Procedure:1. Disconnect the Sunny Central from all voltage sources (see Section 14, page 75).2. Disassemble the panels (see Section 8.3, page 46).3. Screw the protective cover over the fuses.4. Decommission the DC main distribution (see DC main distribution documentation).5. Decommission the DC sub-distributions (see DC sub-distribution documentation).6. Disconnect the AC and DC cabling in the Sunny Central.7. Mount the panels (see Section 15.7).8. Close the door of the interface cabinet.

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the Sunny Central. Touching live components results in death or serious injury due to electric shock.

• Always perform work on the Sunny Central in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, NFPA 70E and any locally applicable provisions.

• When working in a high contact-risk environment, wear Class 1 personal protective equipment.• Do not touch any live components.• Follow the instructions precisely.• Observe all warning messages on the product and in the documentation.• Observe all safety precautions of the module manufacturer.• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage

sources before performing any work on the inverter:– Line voltage for grid feed-in– Internal power supply– DC voltage from the PV array– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors of the

Sunny Central to discharge completely.• Before working on the Sunny Central, check that all devices are completely voltage-free.• Ground and short-circuit.• Cover or isolate any adjacent live components.

Class

Class 1 protective equipment requiredIn accordance to NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Class 1 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. These areas are marked accordingly on the machine, and can only be made accessible after de-energization of the inverter.For additional information, please contact the SMA Service Line.

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17 Technical Data17.1 Sunny Central 500CP XTInput DataMPP voltage range 430 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,250 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 500 kVAContinuous AC power at +25°C 550 kVAMaximum AC current 1,176 AACNominal AC current 1,069 AACNominal AC voltage − 10% / +15% 270 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3%Overvoltage category - AC output IIIOvervoltage category - communication II

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17.2 Sunny Central 630CP XT

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "‒40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

Input DataMPP voltage range 500 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,350 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

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Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 630 kVAContinuous AC power at +25°C 700 kVAMaximum AC current 1,283 AACNominal AC current 1,155 AACNominal AC voltage − 10% / +15% 315 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3%Overvoltage category - AC output IIIOvervoltage category - communication II

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.7%European weighted efficiency, ηEU 98.5%CEC weighted efficiency 98.5%

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17.3 Sunny Central 720CP XT

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "-40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m³/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

Input DataMPP voltage range 525 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,400 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 720 kVAContinuous AC power at +25°C 792 kVAMaximum AC current 1,411 AAC

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Nominal AC current 1,283 AACNominal AC voltage − 10% / +15% 324 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3%Overvoltage category - AC output IIIOvervoltage category - communication II

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "‒40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

Output Data

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17.4 Sunny Central 760CP XTInput DataMPP voltage range 554 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,400 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 760 kVAContinuous AC power at +25°C 836 kVAMaximum AC current 1,411 AACNominal AC current 1,283 AACNominal AC voltage − 10% / +15% 342 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3 %Overvoltage category - AC output IIIOvervoltage category - communication II

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

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17.5 Sunny Central 800CP XT

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "-40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

Input DataMPP voltage range 583 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,400 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

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FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 800 kVAContinuous AC power at +25°C 880 kVAMaximum AC current 1,411 AACNominal AC current 1,283 AACNominal AC voltage − 10% / +15%*

* PV modules are subject to a natural aging process. This reduces their performance capacity. The Sunny Central 800CP XT has the option of adjusting the nominal AC voltage and power to the degradation of the PV modules. Further information can be found in the Sunny Central operating manual.

360 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3 %Overvoltage category - AC output IIIOvervoltage category - communication II

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°C

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17.6 Sunny Central 850CP XT

Extended operating temperature range* ‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL** 4,000 m

* Only for Sunny Central with the option "‒40°C"** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude

Installation").

Input DataMPP voltage range 620 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,400 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at 50°C 850 kVAContinuous AC power at 25°C 935 kVAMaximum AC current 1,411 AACNominal AC current 1,283 AACNominal AC voltage − 10% / +15%* 386 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leading

Ambient Conditions

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17 Technical Data SMA America, LLC

94 SCCPXT-IA-D4btf-US-en-22 Installation Manual

Maximum total harmonic distortion < 3%Overvoltage category - AC output IIIOvervoltage category - communication II

* PV modules are subject to a natural aging process. This reduces their performance capacity. The Sunny Central 850CP XT has the option of adjusting the nominal AC voltage and power to the degradation of the PV modules. Further information can be found in the Sunny Central operating manual.

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "‒40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

Output Data

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SMA America, LLC 17 Technical Data

Installation Manual SCCPXT-IA-D4btf-US-en-22 95

17.7 Sunny Central 900CP XTInput DataMPP voltage range 656 VDC to 850 VDCMaximum DC voltage 1,000 VDCMaximum DC current 1,400 ADCMaximum short-circuit current 1,680 ADCOvervoltage category - DC inputs IIOvervoltage category - AC inputs IIIOvervoltage category - communication II

Number of DC InputsMaximum number with DC fuse 9 per potentialMaximum number with DC fuse with SMB Connection Kit 24 per potentialMaximum number with DC busbar 2 per potentialMaximum number with Optiprotect 50 A fusing 32 per potentialMaximum number with Optiprotect 100 A fusing 16 per potential

FusingFuse sizes with DC fuse*

* Screening factor: 0.7

125 A / 160 A / 200 A / 250 A / 315 A / 400 AFusing with DC busbar in DC main distributionFusing with Optiprotect 50 A / 100 A

Output DataNominal AC power at +50°C 900 kVAContinuous AC power at +25°C 990 kVAMaximum AC current 1,411 AACNominal AC current 1,283 AACNominal AC voltage − 10% / +15%*

* PV modules are subject to a natural aging process. This reduces their performance capacity. The Sunny Central 900CP has the option of adjusting the nominal AC voltage and power to the degradation of the PV modules. Further information can be found in the Sunny Central operating manual.

405 VACPower frequency 50 Hz / 60 HzDisplacement power factor cos φ 0.9 lagging to 0.9 leadingMaximum total harmonic distortion < 3 %Overvoltage category - AC output IIIOvervoltage category - communication II

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17 Technical Data SMA America, LLC

96 SCCPXT-IA-D4btf-US-en-22 Installation Manual

Power ConsumptionSelf-consumption in operation < 1,900 WStandby consumption < 100 WExternal supply voltage 230 V / 400 V (3/N/PE), 50 Hz / 60 Hz

Dimensions and WeightWidth x height x depth 2,562 mm x 2,272 mm x 956 mm

(100.9 in. x 89.5 in. x 37.6 in.)Weight 1,900 kg (4,190 lbs.)

EfficiencyMaximum efficiency, ηmax 98.6%European weighted efficiency, ηEU 98.4%CEC weighted efficiency 98.5%

Ambient ConditionsDegree of protection: electronics / connection area (as per IEC 60529)

IP54 / IP43

Pollution degree 2Operating temperature range ‒25°C to +62°CExtended operating temperature range*

* Only for Sunny Central with the option "-40°C"

‒40°C to +62°CHumidity 15% to 95%Fresh air consumption 3,000 m3/hMaximum operating altitude above MSL**

** For installation at altitudes over 2,000 m, the maximum DC and MPP voltage values change (see Technical Information "High-Altitude Installation").

4,000 m

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SMA America, LLC 18 Contact

Installation Manual SCCPXT-IA-D4btf-US-en-22 97

18 ContactIf you have technical problems concerning our products, contact the SMA Service Line. We need the following data in order to provide you with the necessary assistance:

• Inverter type• Serial number of the Sunny Central• Type and number of PV modules connected• Type of communication• Display message on the Sunny Central• Error number on the Sunny Central

United States/Estados Unidos

SMA America, LLCRocklin, CA

+1 877-MY-SMATech (+1 877-697-6283)*+1 916 625-0870**

* toll free for USA, Canada and Puerto Rico / Llamada gratuita en EE. UU., Canadá y Puerto Rico** international / internacional

Canada/Canadá

SMA Canada, Inc.Toronto

+1 877-MY-SMATech (+1 877-697-6283)***

*** toll free for Canada / gratuit pour le Canada

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19 Revision History SMA America, LLC

98 SCCPXT-IA-D4btf-US-en-22 Installation Manual

19 Revision HistoryRevisions to version 2.0New functions

External fast stop 26Low-temperature option 27New power classes 11SC-COM 25

Revised functionsGrounding concept 27Schematic diagram 27

Revised installation contentCable routing between MV transformer and inverter 35Mounting on base 37Revised technical data of the inverter 29

Revisions to version 2.1New functions

Remote shutdown 26New installation content

Mounting panels and protective covers 82New safety warnings

New warning labels on the product 24New warning messages

Danger if Sunny Central is disconnected on the AC and DC sides 16Removed content

Sunny Central with light repeatersRevised installation content

Revised material of the busbars 49, 54, 57

Revisions to version 2.2Removed content

Cover of the touch displayOptiprotect option

Revised functionsPosition of the type label 23

Revised installation contentDisconnecting grid monitoring with motor-protective circuit-breaker 76, 81Using a jumper wire when the fast stop is not used 78

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