Siemens 3VA1 100 A Manual page 294

Accessories
4.8 Residual current devices
While residual current devices attached to the circuit breakers are supplied with voltage from
all connected phases of the system to be monitored, the modular residual current device
(MRCD) is supplied from a 1-phase auxiliary voltage source (internal or external). The
modular residual current device utilizes an undervoltage release (UVR) or a shunt trip.
The recommended applications for different RCD designs are thus as follows:
+
-
Sizes
Special "BASIC" residual current devices have been developed for use with 3VA1 molded
case circuit breakers.
294
Suitable
Less suitable
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02