Siemens SENTRON 3VL series - Service and maintenance; Preventive measures

3VL IEC molded case circuit breakers
System Manual, 11/2013, 110 0110 - 02 DS 03
125
Service and maintenance
10
10.1
Preventive measures
Maintenance
DANGER
Qualified personnel
Functionality tests and maintenance tasks must only be carried out by qualified personnel
due to the dangers associated with electrical equipment.
The following inspection intervals must be defined by the operator (qualified skilled
personnel) depending on the conditions of use of the relevant 3VL molded case circuit
breaker:
● At least 1 x per year
● After severe high-energy shutdowns
● After trips caused by the electronic overcurrent release
● After shutdowns caused by the thermal overcurrent release
● After shutdowns caused by the magnetic instantaneous overcurrent release
● Additional testing of downstream molded case circuit breakers.