SUSPENSION OF OPERATIONAL OPSAF-16-420 PRACTICE SOP …

SUSPENSION OF OPERATIONAL

PRACTICE SOP 420

OPSAF-16-420 Issue No. 4

© SP Power Systems Limited of 20

Internal Use

1. SCOPE

This document details the application of SOP 420 (Applicable to Schneider CBGS-0 Switchgear) issued by the Energy Networks Association.

2. ISSUE RECORD

This is a Reference document. The current version is held on the EN Document Library. It is your responsibility to ensure you work to the current version.

Issue Date Issue No. Author Amendment Details

April 2021 1 Patrick Dolan Original Issue1

July 2021 2 Patrick Dolan Original issue restrictions unchanged - appendices added2

Dec 2021 3 Patrick Dolan Amendment to restriction – appendices updated

May 2022 4 Patrick Dolan Amendment to restriction – addition of remote operating device

3. ISSUE AUTHORITY

Author Owner Issue Authority

Patrick Dolan Lead Engineer

Fraser Ainslie Head of Engineering Design and Standards

Fraser Ainslie Head of Engineering Design and Standards

4. REVIEW

This is a Reference document which has a 5 year retention period after which a reminder will be issued to review and extend retention or archive.

5. DISTRIBUTION

This document is not part of a Manual maintained by Document Control and does not have a maintained distribution list. It is published on the SP Energy Networks website.

1 Line 1 inadvertently removed on Issue 2 update: correctly reinstated in Issue3 2 Line 2 statement “Original issue” incorrect in Issue 2 - Additional text added: “restrictions unchanged- appendices” added to correct amendment details in Issue 3


PRACTICE SOP 420



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6. CONTENTS

1. SCOPE ....................................................................................................................................... 1

2. ISSUE RECORD ........................................................................................................................ 1

3. ISSUE AUTHORITY .................................................................................................................. 1

4. REVIEW ..................................................................................................................................... 1

5. DISTRIBUTION .......................................................................................................................... 1

6. CONTENTS ............................................................................................................................... 2

7. SOP DETAILS ........................................................................................................................... 3

8. SOP HEADER ........................................................................................................................... 4

9. APPENDIX - ADDITIONAL GUIDANCE ................................................................................. 5


PRACTICE SOP 420



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7. SOP DETAILS

EQUIPMENT TYPE Schneider CBGS-0

ORIGINATING COMPANY SPEN

DATE 1 Apr 2021

NUMBER INSTALLED IN ENERGY NETWORKS NORTH

66 (SPD and SPT, includes equipment that may not be commissioned / in SAP)

NUMBER INSTALLED IN ENERGY NETWORKS SOUTH

122 (includes equipment that may not be commissioned / in SAP)

REASON There have been 6 incidents concerning the Schneider CBGS-0 switchgear, SF1-G CB modules globally (1 found in SPEN) where the moving contact on one of the CB poles remains captive in Closed position after a CB open operation.

STATUS IN INITIATING COMPANY

All operations of the 3-pos switch (Open -> Service and Service -> Open) shall be completed with an approved remote operating solution where reasonably practicable.

Alternatively, operations shall only be completed with the network on both sides of the CB not live

• Following any affected CB open operation, verification that all poles of the CB have opened is mandatory

SPEN APPLICATION As above

ADDITIONAL INFORMATION As per the hierarchy of switching, all live operations of the CB shall be carried out remotely where practicable and electrically from the switchgear control panel (BCU with time delayed operation) for all other operations. Opening of all CB poles may be verified by aid of the VPIS present on the switchboard when either the CCT side or the BB side of the CB is live.

UPDATE Restriction updated to include additional restriction of manual

operation of the 3-pos switch with (Open -> Service & Service -> Open) with network both sides of the CB not live

Restriction updated to allow utilisation of the switch remote operating device provided by the OEM (Schneider)

REMEDIAL ACTION None yet agreed


PRACTICE SOP 420



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8. SOP HEADER

Field Name Field Value Field Size

Name (SOP) * SOP420 6

The reason for the * Operational Restriction

CB Pole stays closed upon trip 30

Nature of the * Operational Restriction

Live op of 3-pos sw restricted 50

Comments * Manual 3-pos sw (open>service & service>open) ops prohibited with network live either side of CB. Op of 3-pos sw with network live allowed with remote operating device only. Verify CB poles open on op

200

Restricted Access to * Substation Flag Y N 1

SOP Impact Code * (highlight or underline the appropriate code)

0 Temporary/Impact under assessment 1 Very minor operational/network impact 2 Moderate operational/network impact 3 Significant impact on system perf./measurable business costs 4 Inoperable without intervention 5 Inoperable – no cost effective solution/must be replaced

N/A

SOP component type * (highlight or underline the appropriate code)

01 Bushing only 02 Circuit Breaker 03 Fixed Portion only 04 Moving Portion only 05 Switch 06 RMU 07 Transformer only 08 Tap Changer only 09 Transformer & Bushing 10 Transformer & Tap Changer

N/A

Search Criteria * *CBGS* CB module DOM 03/2018 – 04/2020, affected range confirmed by Schneider

N/A

* This denotes a Mandatory Field


PRACTICE SOP 420



Internal Use

9. APPENDIX - ADDITIONAL GUIDANCE

See presentation in the pages below.


PRACTICE SOP 420



Internal Use

SUSPENSION OF OPERATIONAL OPSAF-16-420 PRACTICE SOP …

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