Siemens SIRIUS 3RU - Page 45

Product description
3.8 3RB31 solid-state overload relays
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
45
3RB3143 electronic overload relays, size S3, 70 mm width
Front view
Description
3RB3143 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 some cases 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
RESET button
A device set to manual RESET can be reset
locally by pressing the RESET button. In
addition, an electronic remote RESET is
integrated into the 3RB31.
④
Tripping class setting / internal ground-fault
detection (3RB31 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 terminal:
The main circuit can be connected using
either the screw-type connection system or
through-hole technology with straight-
through transformer. Ring terminal lug
connection or busbar connection after
removal of the box terminal block is
optionally possible.
⑧
Selector switch for manual/automatic
RESET and RESET button:
The slide switch is used to choose between
manual and automatic RESET.
⑨
Data Matrix code
⑩
Motor current setting:
The large rotary button provides an easy
means of setting the device to the rated
motor current.
⑪
Label