Application planning
4.1 Types of installation and installation locations
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
140 Manual, 10/2018, L1V30499596002-01
Front
Front
broadened terminals for main
circuit connection
Rear
Cables
The circuit breaker has the following degrees of protection (fixed-mounted breaker and
withdrawable breaker):
● IP20 for circuit breakers, except for the terminals
● IP30 for the front of the circuit breaker if installed in switchboards with a door sealing
frame IP30 (see Chapter Accessories for connection and insulation (Page 93))
● IP54 for the front of the circuit breaker if installed in switchboards with a padlockable
protective cover IP54 (see Chapter Accessories for connection and insulation (Page 93))