Users Manual

Description
2.3 Protection system
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
45
2.3.2 Option plug
The option plug determines the current rating and the basic protective functions of the
electronic trip unit of the 3WA circuit breaker.
(1)
Article number (on top, not visible when plugged in)
(2)
Current rating
(3)
Basic protective functions
(4)
Country of manufacture (on the bottom side, not visible when plugged in)
The option plug can be replaced to adapt the circuit breaker to changing requirements.
Note
The electronic trip unit continuously monitors the option plug for presence and validity. If no
or an impermissible option plug is detected, the electronic trip unit instantly trips the 3WA
circuit breaker. This is indicated as an error via the red LED INFO as well as in the display of
the ETU600.