Accessories
4.2 Internal accessories
3VA molded case circuit breakers with UL and IEC certification
158 Manual, 01/2019, L1V30435333-01
Electrical alarm switches EAS
Electrical alarm switches are operated as soon as the main contacts of the molded case
circuit breaker open in the event that the breaker is tripped by the ETU. They indicate the
following conditions:
● Overload L and neutral conductor overload
● Short-circuit S, I
● Ground-fault tripping G
The electrical alarm switch is not operated:
● When the breaker is tripped manually
– PUSH TO TRIP
– When the breaker is withdrawn from the plug-in/draw-out socket when the main
contacts are closed
● When activated via an auxiliary release
– Shunt trip STL, STF
– Undervoltage release UVR
– Universal release UNI
You can use electrical alarm switches only with the 3VA6 molded case circuit breakers with
electronic trip units (ETU).
To Next Page
Loading...
