Siemens SITOP series - Page 34

Installation
5.1 Line-side connection
SITOP modular 1ph/2ph
34 Operating Instructions, 06.2014, C98130-A7548-A1-3-7629
between line conductors L1 and L2 and an RCD is used as protection against direct or
indirect contact, then only an AC/DC-sensitive RCD type B is permitted.