Inspection & Maintenance
4.3 Planning of inspection and maintenance
3WJ Air Circuit breakers
170 Operating Instructions, 12/2022, L1V30828903001-01
4.3.3 Logging
Obligation to maintain logs for warranty claims
The operator must log all inspection and maintenance work. The logs should be kept in the
archive for at least ten years.
In order to make it possible to clearly identify the circuit breaker and the general data, every
log should contain the following information:
• General information:
– Date of inspection/maintenance
– Name of person responsible for inspection/maintenance
– Names of other persons involved in inspection/maintenance
– Date of last inspection/maintenance
– Mounting location of the circuit breaker (room, power distribution equipment, section,
cell)
– Ambient conditions (temperature, air humidity, pollution degree)
– Field of application, sector
– Special events during operation (e.g. short-circuit or overload trips)
– Known fault scenarios in the past
• Information about the circuit breaker:
– Circuit breaker type
– Article number and options
– Circuit breaker ID number
– ID number of electronic trip unit
– Fixed-mounted or withdrawable version
– Operating cycles recorded by means of mechanical operating cycles counter or
electronic trip unit
• Information about inspection work performed
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