Connection Of 3Ru21 Overload Relay - Siemens SIRIUS 3RT Series System Manual

SIRIUS 3RU2/3RB3 overload relays
5.7 Connection
5.7.1

Connection of 3RU21 overload relay

Control circuit
An additional power supply is not required for the operation of 3RU21 thermal overload
relays.
Connection of terminals
Terminal
2T1
4T2
6T3
95
96
97
98
14/22
A2
Reference
More information ...
About connecting the SIRIUS modular system
About conductor cross-sections and tightening
torques
514
Designation
Main circuit terminals
NC contact (NC 95-96)
NO contact (NO 97-98)
Feed-through contactor auxiliary switch (S00 only)
Feed-through contactor coil terminal (S00 only)
Can be found in the chapter titled ...
System overview, under Connection (Page 74)
Conductor cross-sections main circuit (Page 541)
System Manual, 01/2011, A8E56203870002-03
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