Siemens SENTRON 3VL System Manual page 54

Functions
5.1 Current protection
Special requirements
● Every RCD module requires a separate cable for remote tripping. It is not possible to use
one cable when switching two or more RCD modules in parallel. It is possible to use two
or more switches in parallel for remote tripping of an RCD module.
● The customer provides an unshielded or shielded twisted-pair cable with a maximum
capacity of 36 nF as well as a maximum resistance of 50 Ohms (total length = out and
back).
● Example: The maximum cable length with a cable capacity of 120 nF/km is 330 m. With a
shielded cable, the shield must not be applied to the PE conductor of the system.
● A separate conductor must connect terminal X13.2 with the ground busbar (E or PE).
This connection is recommended for the prevention of electrostatic charge on the remote
tripping cable. This applies in particular when long cables (> 10 m) are used. Otherwise,
the remote tripping cable is isolated.
54
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01