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Medium-Voltage Switchgear Circuit-Breaker Switchgear Type NXAIR: Factory-Assembled, Type-Tested

and Metal-Enclosed Switchgear for Indoor Installation, Air-Insulated Loss of Service Continuity Category: LSC 2B (Metal-Clad)

Partition Class PM (Metallic Partition) Internal Arc Classification: IAC A FLR, I

SC = 40 kA, t = 1s Arc Duration

FIRST LINE OPERATION

& MAINTENANCE

TRAINING COURSE

Order No.: 110-0134.9

8BX3300-0LA00-0AB1

Revision: 05 Issue: 14.12.2011

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About these Instructions

These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with operation. For details about technical design and equipment like e.g. technical data, secondary equipment, circuit diagrams, please refer to the order documents. The switchgear is subject to continuous technical development within the scope of technical progress. If not stated otherwise on the individual pages of these instructions, we reserve the right to modify the specified values and drawings. All dimensions are given in mm’s. For further details, e.g. about additional equipment, please refer to catalog HA 25.71. Should further information be desired or should particular problems arise which are not covered sufficiently by these instructions, the matter should be referred to the competent Siemens department. The contents of this instruction manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The Sales Contract contains the entire obligations of Siemens. The warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements contained herein do not create new warranties or modify the existing warranty.

Medium-Voltage

Switchgear

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Contents

Safety instructions .................................................................................... 4

1 Signal terms and definitions ................................................ 4

2 General instructions ............................................................ 4

3 Due application .................................................................. 5

4 Qualified personnel ............................................................. 5

Description ................................................................................................. 6

5 Features................................................................................ 6

6 Panel types........................................................................... 7

6.1 Circuit-breaker panel ................................................ 7

6.2 Disconnecting panel……............................................8

6.3 Metering panel.......................................................... 8

6.4 Bus sectionalizer....................................................... 9

6.5 Contactor panel......................................................... 9

7 Panel design......................................................................... 10

8 Interlocks ............................................................................. 12

9 Accessories ......................................................................... 13

10 Technical data……..…………...................................................14

10.1 Complete switchgear................................................. 14

10.2 Operating conditions.................................................. 18

10.3 Vacuum circuit-breaker type 3AE ….......................... 19

10.4 Contactor type 3TL6 .................................................. 19

10.5 Operating instructions for circuit-breaker type 3AE &

contactor type 3TL6 .................................................. 20

11 Service information .................................................................. 21

11.1 Maintenance.................................................................21

11.2 Visual inspection ........................................................ 21

11.3 Preventive maintenance ............................................ 23

11.4 Switchgear extension ................................................ 24

11.5 Spare part orders....................................................... 24

11.6 Replacement of panels and components....................25

11.7 Disposal .................................................................... 25

Operation NXAIR .................................................................................. 26

12 Safety instructions.............................................................. 26

13 Panel operation....................................................................27

13.1 Control elements at the front side of the panel ........ 27

13.2 Access to compartments ......................................... 29

13.3 Operating tools ........................................................ 30

13.4 Opening and closing the high-voltage door.............. 34

13.5 Racking the circuit-breaker to service position ….... 40

13.6 Racking the circuit-breaker to test position ............. 43

13.7 Racking the V.T. unit to service position ................. 46

13.8 Racking the V.T. unit to test position ....................... 49

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13.9 Racking the contactor to service position ................... 52

13.10 Racking the contactor to test position ....................... 55

13.11 Closing the circuit-breaker...........................................58

13.12 Opening the circuit-breaker ....................................... 60

13.13 Charging the spring manually......................................61

13.14 Closing or opening the contactor.................................63

13.15 Applying the Feeder earth.......................................... 64

13.16 Removing the Feeder earth.........................................67

13.17 Applying the Busbar earth.......................................... 69

13.18 Removing the Busbar earth.........................................72

13.19 Access to the cable compartment ............................. 74

13.20 Removing the circuit-breaker, discon-link and/or metering

unit out of the panel ................................................... 79

13.21 Inserting the circuit-breaker, discon-link and/ or metering

unit in a panel............................................................ 84

13.22 Removing the V.T unit from the panel ....................... 89

13.23 Inserting the V.T. unit into the panel........................... 93

13.24 Removing the contactor from the panel ..................... 96

13.25 Inserting the contactor into the panel ......................... 99

13.26 Emergency operation of the feeder earth-switch without

the circuit-breaker being inserted in the panel........... 103

13.27 Verification of safe isolation from the supply ……...... 104

13.28 Connecting the earthing and short-circuiting facility....108

13.29 Manual operation of shutters in circuit-breakers, discontrs.

and metering panels....................................................109

13.30 Manual operation of shutters in the contactor panel . 112

13.31 Application of HVHRC fuse-links in contactor panel . 117

13.32 Motor starting currents............................................... 120

13.33 Coordinating components of the motor circuit …....... 121

13.34 HVHRC fuse-links of the V.T. unit...............................123

13.35 Key-operated interlocking.......................................... 126

14 Trouble shooting......................................................................132

Index.............................................................................................................133

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DANGER!

As used in these instructions, this means that personal injuries can occur if the

relevant precautionary measures are not taken or observed or a risk assessment has

not been carried out.

Observe the safety instructions.

ATTENTION!

As used in these instructions, this means that damage to property or environment can

occur if the relevant precautionary measures are not taken.

Observe the safety instructions.

Safety instructions

1 Signal terms and definitions

Symbols used: Operation symbol:

Identifies an operation. Asks the operator to perform an operation.

Result symbol:

Identifies the result of an operation.

2 General instructions

Independently of the safety instructions given in these operating instructions, the local laws, ordinances,

guidelines and standards for operation of electrical equipment as well as for labor, health and

environmental protection apply.

Any kind of modification on the product or alteration of the product must be coordinated with the

manufacturer in advance, as uncoordinated modifications or alterations can cause the expiration of

warranty claims, cause danger to life, limb and other legally protected interests, and the fulfillment of the

type tests (according to IEC 62271-200) may not be guaranteed anymore.

NOTE!

As used in these instructions, this points at facilitations of work, particularities for

correct operation, or warning covering possible mal-operation.

Observe the steps of the safe operation and all safety instructions.

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DANGER!

The perfect and safe operation of this switchgear is conditional on:

Observance of operating and installation instructions.

Qualified personnel.

Proper transportation and correct storage of the switchgear.

Correct installation and commissioning.

Diligent operation and maintenance.

Observance of the instructions applicable at site for installation, operation and

safety.

The edition of the standard is only mentioned in the test report applicable at the time of switchgear manufacture. Five Safety Rules of The Five Safety Rules of Electrical Engineering must generally be observed during operation of Electrical Engineering the products and components described in these operating instructions:

Isolate. Secure against reclosing. Verify safe isolation from supply. Earth and short-circuit. Cover or barrier adjacent live parts.

3 Due application

The switchgear corresponds to the relevant laws, prescriptions and standards applicable at the time of

delivery. If correctly used, they provide a high degree of safety by means of logical mechanical interlocks and

shockproof metal enclosure of live parts.

4 Qualified personnel

Qualified personnel in accordance with these instructions are persons who are familiar with maintenance and

operation of the product and have appropriate qualifications for their work.

Furthermore, qualified personnel must have the following training and instruction or authorization:

Training and instruction or authorization to switch on, switch off, earth and identify power circuits and equipment / systems as per the relevant safety standards.

Training and instruction regarding the applicable specifications for the prevention of accidents and the care and use of appropriate safety equipment.

Training in first aid and behavior in the event of possible accidents