SIEMENS
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Siemens IC 10 · 2017
Motor Starter Protectors/Circuit Breakers
SIRIUS 3RV2 Motor Starter Protectors/Circuit Breakers
Accessories
Mountable accessories
7
■
Overview
Mounting location and function
The 3RV2 motor starter protectors/circuit breakers have three
main contact elements. In order to achieve maximum flexibility,
auxiliary switches, signaling switches, auxiliary releases and
isolator modules can be supplied separately.
These components are easily fitted to the switches without the
use of any tools according to requirements.
Overview graphic,
see page 7/7
.
For a complete overview of which accessories can be used for the
various motor starter protectors/circuit breakers,
see page 7/2
.
Front side
Note:
• A maximum of four auxiliary contacts with
auxiliary switches can be mounted on each
motor starter protector/circuit breaker
Transverse auxiliary
switches, solid-state
compatible transverse
auxiliary switches
1 NO + 1 NC
or
2 NO
or
1 CO
An auxiliary switch block can be inserted transversely on the front. The overall
width of the motor starter protectors/circuit breakers remains unchanged.
Left-hand side
Notes:
• A maximum of four auxiliary contacts with
auxiliary switches can be mounted on each
motor starter protector/circuit breaker
• Lateral auxiliary switches (two contacts) and
signaling switches can be mounted separately
or together
• Signaling switches cannot be used for 3RV27
and 3RV28 circuit breakers
Lateral auxiliary switches
(2 contacts)
1 NO + 1 NC
or
2 NO
or
2 NC
One of the three lateral auxiliary switches can be mounted on the left side per
motor starter protector/circuit breaker. The contacts of the auxiliary switch
close and open together with the main contacts of the motor starter protec-
tor/circuit breaker.
The width of the lateral auxiliary switch with two contacts is 9 mm.
Lateral auxiliary switches
(4 contacts)
2 NO + 2 NC
One lateral auxiliary switch with four contacts can be mounted on the left side
per motor starter protector/circuit breaker. The contacts of the auxiliary switch
close and open together with the main contacts of the motor starter
protector/circuit breaker.
The width of the lateral auxiliary switch with four contacts is 18 mm.
Signaling switches
Tripping 1 NO + 1 NC
Short circuit 1 NO + 1 NC
One signaling switch can be mounted on the left side of each motor starter
protector.
The signaling switch has two contact systems.
One contact system always signals tripping
irrespective of whether this was
caused by a short circuit, an overload or an auxiliary release. The other contact
system only switches in the event of a short circuit. There is no signaling as a
result of switching off
with the actuator.
In order to be able to switch on the motor starter protector again after a short
circuit, the signaling switch must be reset manually after the error cause has
been eliminated.
The width of the signaling switch is 18 mm.
Right-hand side
Notes:
• One auxiliary release can be mounted per
motor starter protector/circuit breaker
• Accessories cannot be mounted on the
right-hand side of the 3RV21 motor starter
protectors for motor protection with overload
relay function
Auxiliary releases
Shunt releases
For remote-controlled tripping of the motor starter protector/circuit breaker. The
release coil should only be energized for short periods
(see circuit diagrams)
.
or
Undervoltage releases
Trips the motor starter protector/circuit breaker when the voltage is interrupted
and prevents the motor from being restarted accidentally when the voltage is
restored. Used for remote-controlled tripping of the motor starter protector/
circuit breaker.
Particularly suitable for EMERGENCY-STOP disconnection by way of
corresponding EMERGENCY-STOP pushbuttons according to EN 60204-1.
or
Undervoltage releases with
leading auxiliary contacts
2 NO
Function and use as for the undervoltage release without leading auxiliary
contacts, but with the following additional function: the auxiliary contacts will
open in switch position OFF to deenergize the coil of the undervoltage release,
thus interrupting energy consumption. In the "tripped" position, these auxiliary
contacts are not guaranteed to open. The leading contacts permit the motor
starter protector/circuit breaker to reclose.
The width of the auxiliary release is 18 mm.
Top
Notes:
•
Isolator modules cannot be used for 3RV27 and
3RV28 circuit breakers
• Isolator module for size S2:
-
only with 3RV2 motor starter protectors/circuit
breakers up to max. 65 A
-
not with the transverse auxiliary switch
• Terminal screws of the transverse auxiliary
switch are covered by the isolator module;
Recommendation: Lateral auxiliary switches
should be used in combination with the isolator
module, or the isolator module should not be
mounted until the auxiliary switch has been
wired up
Isolator modules
Isolator modules can be mounted to the upper connection side of the motor
starter protectors.
The supply cable is connected to the motor starter protector through the
isolator module.
The plug can only be unplugged when the motor starter protector is open and
isolates all 3 poles of the motor starter protector from the network. The shock-
protected isolation point is clearly visible and secured with a padlock to
prevent reinsertion of the plug.
© Siemens AG 2016