Siemens SINOVA - Table of Contents

3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
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Table of contents
1 Introduction ........................................................................................................................................... 6
1.1 Technical support ................................................................................................................ 6
1.2 Safety instructions ............................................................................................................... 7
1.3 Standards ............................................................................................................................ 8
1.4 Transport ............................................................................................................................. 8
2 Description ........................................................................................................................................... 10
2.1 Mechanical components .................................................................................................... 10
2.1.1 Design ............................................................................................................................... 10
2.1.1.1 Circuit Breaker ................................................................................................................... 10
2.1.1.2 Guide frame ...................................................................................................................... 12
2.1.2 Circuit Breaker identification .............................................................................................. 13
2.1.2.1 Accessory and rating label .................................................................................................. 13
2.1.3 Indicators of the Circuit Breaker ......................................................................................... 15
2.1.4 Operation .......................................................................................................................... 16
2.1.4.1 Installation ........................................................................................................................ 16
2.1.4.2 Racking the Circuit Breaker in or out ................................................................................... 18
2.1.4.3 Position of the Circuit Breaker in the guide frame ............................................................... 21
2.1.4.4 Removing the Circuit Breaker from the guide frame ............................................................ 22
2.1.4.5 Inserting the Circuit Breaker into the guide frame ............................................................... 23
2.1.4.6 Closing and opening .......................................................................................................... 24
2.1.4.7 Commissioning checklist .................................................................................................... 28
2.1.5 Connection ........................................................................................................................ 29
2.1.5.1 Main connections .............................................................................................................. 29
2.1.5.2 Secondary disconnect terminals ......................................................................................... 35
2.1.5.3 Connecting the protective conductor ................................................................................. 38
2.2 Electronic components ...................................................................................................... 39
2.2.1 Electronic Trip Unit (ETU) - functional overview .................................................................. 39
2.2.2 ETU350WJ ......................................................................................................................... 41
2.2.3 ETU360WJ ......................................................................................................................... 44
2.2.4 Indicators on the ETU ......................................................................................................... 48
2.2.5 Protection functions ........................................................................................................... 50
2.2.5.1 Basic protection functions .................................................................................................. 50
2.2.5.2 LT: Overload protection (Long time), L-tripping .................................................................. 50
2.2.5.3 ST: Short-time delay short-circuit release (Short time), S tripping ........................................ 51
2.2.5.4 INST: Instantaneous short-circuit release (Instantaneous), I-tripping ................................... 51
2.2.5.5 GF: Ground-fault protection (Ground-fault), G-tripping ....................................................... 52
2.2.5.6 N: Neutral conductor protection (Neutral), N-tripping ......................................................... 52
2.2.6 Additional functions........................................................................................................... 52
2.2.7 Menus on the displays of the ETU350WJ and ETU360WJ ..................................................... 53
2.2.8 Recommissioning after opening operation by electronic trip unit ........................................ 55