Regular maintenance

Recommended maintenance/inspection intervals

Following initial commissioning, the equipment/system must be inspected at least once per year.

In addition, an inspection should be carried out after 1000 trips at rated operational current.

If the molded case circuit breaker or switch disconnector is operated in an atmosphere that is dust-laden or in which corrosive vapors, gases, or salt spray is present, it is advisable to adjust the inspection intervals accordingly, e.g. to twice per year.

Inspection procedure recommended for 3VA molded case circuit breakers / switch disconnectors

Optional inspection procedure for the ETU of the 3VA2 molded case circuit breaker