Siemens SIRIUS 3RU - Page 24

Product description
3.4 3RU21 thermal overload relays
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
24 Manual, 09/2016, A5E03656507420A/RS-AB/003
3RU2126 thermal overload relay, size S0, 45 mm width
Front view
Description
3RU2126 overload relay equipment
Position digits
①
Connection for contactor mounting:
In terms of their electrical and mechanical features and their
design, these pins are perfectly compatible with the
3RT2 contactors for the direct mounting of overload relays. Stand-
alone assembly is also an option (in conjunction with a stand-alone
assembly module).
②
Switch position indicator and TEST function for wiring:
Indicates a trip and facilitates testing of the wiring.
③
Motor current setting:
The large rotary button provides an easy means of setting the
device to the rated motor current.
④
Data Matrix code
⑤
Main circuit terminals:
A screw-type, spring-loaded or ring cable lug connection system
can be used to connect the main circuit terminal.
⑥
Control circuit terminals:
A screw-type, spring-loaded or ring cable lug connection system
can be used to connect the control circuit terminal.
⑦
STOP button:
Pressing the button opens the NC contact, thereby disconnecting
the downstream contactor. The NC contact closes again when the
button is released.
⑧
Selector switch for manual / automatic RESET and RESET button:
this switch is used to choose between manual and automatic
RESET. A device set to manual RESET can be reset locally by
pressing the RESET button. The device can be reset remotely
using the RESET modules (accessories) which are compatible for
use with all sizes.
⑨
Label
Terminal labels
2/T1
Main circuit terminals
4/T2
6/T3
95
NC contact (NC 95-96)
96
97 NO contact (NO 97-98)
98