Siemens SIRIUS 3RU - Page 34

Product description
3.6 3RB21 electronic overload relays
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
34 Manual, 09/2016, A5E03656507420A/RS-AB/003
3RB2163 electronic overload relays, size S10 / S12, 145 mm width
Front view
3RB2163 overload relay equipment
Position digits
①
Connection for contactor mounting:
In terms of their electrical and mechanical features and their design, these busbars are perfectly compatible with
3RT1 contactors for the direct mounting of overload relays.
②
Switch position indicator and TEST function for wiring:
Indicates a trip and facilitates testing of the wiring.
③
RESET button
A device set to manual RESET can be reset locally by pressing the RESET button. On the 3RB21 an electronic
remote RESET is integrated.
④
Tripping class setting / internal ground-fault detection (3RB21 only): The rotary switch is used to set the required
tripping class dependent upon the starting conditions and activate internal ground-fault detection.
⑤
Electronics test (device test):
Enables a test of all major device components and functions.
⑥
Control circuit terminal (removable):
A screw-type or spring-loaded system can be used to connect the control circuit terminal.
⑦
Main circuit connection:
The following variants of connection to the main circuit are possible:
• Bus connection system
• Connection with box terminal block