Siemens SENTRON 3VL System Manual page 142

Service and maintenance
11.1 Preventive measures
● Check connections are tight
– Check the terminal screws for proper torque values
– Spot checking of input and output cables
– Spot checking of terminal accessories
– Replace damaged terminal accessories after cleaning the terminal area
● Check, and, if necessary, correct, the settings of the electronic overcurrent trip unit in
accordance with the system conditions
– Electronic circuit breaker releases must only be tested with a device especially
The operator (customer) must arrange for the disposal of the molded-case circuit breaker or
the replaced parts at the end of their service life in accordance with the currently applicable
legal requirements and guidelines.
142
supplied for this purpose.
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01