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))