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Connection Of 3Ru21 Overload Relay; Connection Of 3Rb30/3Rb31 Overload Relays - Siemens SIRIUS 3RU2 Manual

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Connection

8.2 Connection of 3RU21 overload relay

8.2
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
The terminal labels and a description of the operator controls of the 3RU21 thermal overload
relays can be found in the chapter "3RU21 thermal overload relays (Page 24)".
Reference
More information ...
about connecting the SIRIUS modular system
about conductor cross-sections and tightening
torques
8.3

Connection of 3RB30/3RB31 overload relays

Control circuit
The 3RB30 and 3RB31 solid-state overload relays do not need an additional supply voltage
because they power themselves via the integrated current transformers.
Connection of terminals
The terminal labels and a description of the operator controls of 3RB3 solid-state overload
relays can be found in chapters "3RB30 solid-state overload relays (Page 27)" and "3RB31
solid-state overload relays (Page 30)".
Reference
More information ...
about connecting the SIRIUS modular system
about conductor cross-sections and tightening
torques
66
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
can be found ...
in the appendix "References" under SIRIUS
Innovations manuals (Page 148) in the
"SIRIUS Innovations - System Overview" manual.
In the chapter "Technical data (Page 101)".
can be found ...
in the appendix "References" under SIRIUS
Innovations manuals (Page 148) in the
"SIRIUS Innovations - System Overview" manual.
In the chapter "Technical data (Page 101)".
Manual, 09/2014, A5E03656507420A/RS-AA/002

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