Table of contents
3WA1 air circuit breaker
12 Equipment Manual, 02/2023, 92310000002-06
4.16 Special packaging ...........................................................................................................................385
4.16.1 Description .......................................................................................................................................385
4.16.2 Article number .................................................................................................................................385
5 Inspection and maintenance ........................................................................................................... 387
5.1 General ..............................................................................................................................................387
5.2 Safety regulations ...........................................................................................................................389
5.3 Planning of inspection and maintenance...................................................................................390
5.3.1 Inspection interval ..........................................................................................................................390
5.3.2 Scope .................................................................................................................................................391
5.3.3 Logging..............................................................................................................................................393
5.4 Performing inspection ....................................................................................................................394
5.4.1 General ..............................................................................................................................................394
5.4.2 Visual inspection .............................................................................................................................394
5.4.3 Check of the available documentation and of the rating/accessory label..........................395
5.4.4 Testing of mechanical function of the circuit breaker ............................................................395
5.4.5 Testing of mechanical function of the withdrawable circuit breaker and the guide
frame .................................................................................................................................................396
5.4.6 Testing of auxiliary circuits and of cables to external current sensors ...............................396
5.4.7 Testing of mechanical and electrical function of internal accessories ...............................397
5.4.8 Testing of settings and inspection of electronic trip unit .......................................................398
5.4.9 Inspection of the arc chutes, arc chute cover and the contact system ...............................398
5.4.10 Testing of the function of the CubicleBUS² modules ..............................................................399
5.5 Preparing for maintenance work .................................................................................................400
5.6 Maintaining the arc chutes ...........................................................................................................403
5.7 Maintaining the main contacts ....................................................................................................405
5.7.1 Introduction ......................................................................................................................................
405
5.7.2 Maintaining the main contacts and replacing the contact system.......................................406
5.7.3 Article number .................................................................................................................................414
5.8 Decommissioning............................................................................................................................416
6 Technical specifications .................................................................................................................. 417
6.1 Circuit diagrams ..............................................................................................................................417
6.1.1 Secondary disconnect terminal blocks X5 to X9 and their terminal markings ...................417
6.1.2 Terminal connection diagrams of secondary disconnect terminal .......................................418
6.1.2.1 ETU300 terminal assignment diagram .......................................................................................418
6.1.2.2 ETU600 terminal assignment diagram .......................................................................................419
6.1.2.3 Terminal assignment plan supplement for circuit breakers with the K60 option
(with integrated undervoltage release) ......................................................................................421
6.1.3 Closing coil CC / CC-COM ............................................................................................................422
6.1.4 Remote trip alarm reset coil RR ...................................................................................................422
6.1.5 Shunt trip ST / ST-COM / ST2 ....................................................................................................422
6.1.6 Capacitor trip device for shunt trips ...........................................................................................423
6.1.7 Undervoltage release UVR / UVR-t ............................................................................................423
6.1.8 Second tripping solenoid F6 with reclosing lockout ................................................................424
6.1.9 External Trip Controller ETC600 ..................................................................................................424
6.1.10 Digital input / output module IOM230 .......................................................................................425
6.1.11 Digital input/output module IOM350 ..........................................................................................425
6.1.12 Spring charging motor....................................................................................................................426
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