Siemens SIRIUS 3RU - Electrical Connections; Overview of Connection Types

SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
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Connection
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8.1
Connection
Connection types
The electronic and thermal overload relays are available with the following connection types.
3RU2 thermal overload relays
● Size S00 and S0:
– Main and auxiliary circuits: optionally screw connection, spring-loaded connection
technology or ring cable lug connection technology
● Size S2:
– Main circuit: Screw connection with box terminal
– Auxiliary circuit: optionally screw or spring-loaded connection
● Size S3:
– Main circuit: screw connection with box terminal (ring terminal lug connection or
busbar connection after removal of the box terminal block is optionally possible)
– Auxiliary circuit: optionally screw or spring-loaded connection