Mounting/Disassembly; Thermal And Electronic Overload Relays (S00 / S0) - Siemens SIRIUS 3RU Manual

7.3

Mounting/Disassembly

7.3.1

Thermal and electronic overload relays (S00 / S0)

Direct mounting on 3RT contactor (sizes S00 and S0)
The diagram below shows an example mounting scenario based on mounting the
3RU21 thermal overload relay, size S0, on the 3RT2 contactor. The contactor/overload relay
combinations can be snapped onto 35 mm DIN rails according to EN 60715.
Mounting 3RU21 thermal overload relays with screw connection
①
②
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
Push the overload relay into the contactor from below. Attach the two hooks on the overload
relay to the two openings on the rear of the contactor. This pushes the main current contacts
into the corresponding socket contacts on the contactor.
Screw the main conductor terminals tight on the contactor. Check that the cable is clamped
tight.
Mounting
7.3 Mounting/Disassembly
83