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Stored-energy spring mechanism
Unit with spring energy store (mechanical energy). The spring is charged by means of the
spring charging lever or motorized operating mechanism and maintained in a charged state
by means of latches. When these latches are released, the stored energy is routed to the
switching contact and the Circuit Breaker closes.
Trip signal switch
Group signal for overload, short-circuit, and ground-fault tripping by means of microswitch.
Undervoltage release (delayed)
For remotely opening and interlocking the Circuit Breaker. Voltage dips must not cause the
Circuit Breaker to open.
Undervoltage release (instantaneous/short-time delay)
For remotely opening and interlocking the Circuit Breaker as well as for using the Circuit
Breaker in EMERGENCY OFF circuits (to EN 60204-1 / DIN VDE 0113 Part 1) in conjunction
with a separate EMERGENCY OFF device. Brief voltage dips (t
undervoltage release, t
the Circuit Breaker to open.
Use of tools
Buttons located under a cover that can be accessed through a hole (diameter 6.35 mm) must
only be actuated by means of a suitable rod.
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
< 200 ms for short-time delay undervoltage release) must not cause
d
< 80 ms for instantaneous
d
Glossary
217
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