Siemens 3VA1 100 A Manual page 280

Accessories
4.7 Locking and interlocking
Interlocking of molded case circuit breakers
Use of more than one key poses safety hazard and/or risk of damage to property
Leave only 1 key inserted in one of the circuit breakers included in the interlock
arrangement.
Store all other keys in a safe place or lock them away.
In order to ensure reliable functioning of the interlock, only 1 key is left in one circuit breaker
included in the interlock arrangement. This one key serves as the release instrument for only
one molded case circuit breaker at a time.
1. Move all 3VA molded case circuit breakers in the interlock arrangement to the OFF
position and lock them (turn the cylinder lock to the horizontal "locked" position).
2. Remove all keys.
All 3VA molded case circuit breakers in the interlock arrangement are now safely locked
in the OFF (O) position and cannot be operated.
3. Insert one single key in one circuit breaker included in the interlock; store or lock away all
other keys.
280
WARNING
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02