Siemens SENTRON 3WL10 - Summation Current Transformer Rc CT; Locking and Interlocking

3.5.3.3 Summation current transformer Rc CT
Residual currents of 3A to 30A can be measured with a summation current transformer and
evaluated by electronic trip units of the 6-series, which is equipped with a rating plug for residual
current protection and the metering function MF Advanced. The transformer is connected to the
auxiliary conductor terminal system of the circuit breaker.
L1
L2
L3
3WL10
3VA27
N
PE
7
T7 Summation current transformer
3.5.4 Locking and interlocking
Covers and locking provisions to prevent mechanical operations at the operator panel




① Protective covers to prevent unintended mechanical operation
② Locking provision, OFF position, Ronis lock
③ Interlocking set for mechanical ON and/or OFF, for padlocks
④ Locking provision, OFF position, for padlocking
Accessories
3.5External accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 115