Inspection and maintenance
5.4 Performing inspection
3WA1 air circuit breaker
398 Equipment Manual, 02/2023, 92310000002-06
5.4.8 Testing of settings and inspection of electronic trip unit
Note
The electronic trip unit monitors itself continuously and signals detected errors.
configuration software assists with the documentation. For
more information on powerconfig, refer to the internet
(
https://mall.industry.siemens.com/mall/en/WW/Catalog/Products/10230050).
Check the following items or perform the following checks:
• Visual inspection of the electronic trip unit
• Query of stored trips
• Function and readability of the display of the electronic trip unit
• Compliance of protection settings with specifications or available documents
• Documentation of the protection settings. The protection settings of the electronic
trip unit can be stored using the SENTRON configuration software powerconfig.
• Readout of status and maintenance information (logs) using the SENTRON
configuration software powerconfig
• Performance of internal self-test of electronic trip unit with tripping of the circuit
breaker or software-assisted testing, see Chapter Self-monitoring and diagnostics
(Page 173).
5.4.9 Inspection of the arc chutes, arc chute cover and the contact system
Check the following items:
• Optical condition of arc chutes as per Chapter Maintaining the arc chutes (Page 403)
• Damage to the arc chute covers on the guide frame (option)
• Main contacts with contact erosion indicator as per Chapter Maintaining the main
contacts (Page 405)
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