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3RV1 Circuit Breaker/MSP
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
2-17
2.4 Accessories
2.4.1 Attachable accessories: Overview
Auxiliary switches, alarm switches, auxiliary releases and other accessories
can be easily attached to the circuit breaker/MSPs without tools, as
required.
Accesso-
ries
Function/use Width Attach
to
Transverse
auxiliary
switch
The contacts of the auxiliary switches close and open together with the
main contacts of the circuit breaker/MSP. Variants:
• 1 changeover contact
• 1 NO + 1 NC contact
• 2 NO contacts
Width of
the circuit
breaker/
MSP
remains the
same
Front
Electroni-
cally opti-
mized
transverse
auxiliary
switch
One transverse auxiliary switch can be attached for each circuit breaker/
MSP:
Variants:
• 1 changeover contact
Lateral
auxiliary
switch
One lateral auxiliary switch can be attached for each circuit breaker/MSP:
• 1 NO + 1 NC contact
• 2 NO contacts
• 2 NC contacts
• 2 NO + 2 NC contacts
9mm
18 mm
Left side
Alarm
switch
Frame sizes
S0, S2 and
S3
One alarm switch can be attached at the side of the circuit breaker/MSPs
with rotary switches.
The alarm switch has two contact systems:
• One contact system (1 NO + 1 NC) reports a general
tripping operation, irrespective of whether it was caused by a
short circuit, overload or auxiliary release.
• The other contact system (1 NO + 1 NC) only switches in the
event of a
short circuit tripping operation.
To reset the circuit breaker/MSP after a short circuit, the alarm switch
must be reset manually after the cause of the error has been eliminated.
18 mm
Shunt
release
Remote release of the circuit breaker/MSP:
• Via PLC: The coil of the release should be connected to the volt-
age only briefly
• Especially suitable for emergency stop disconnection by means
of appropriate emergency stop switches in acc. with
DIN VDE 0113
18 mm Right
side
Accesso-
ries can-
not be
attached
on the
right of a
circuit
breaker/
MSP
with a
relay
function.
(3RV11)
Undervolt-
age
release
Trips the circuit breaker/MSP in the event of a voltage interruption (e.g.
when the power plug is removed) and prevents the motor starting up inad-
vertently when the voltage returns.
Undervolt-
age release
with lead-
ing
auxiliary
contacts
2 NO
Function and use, see undervoltage release.
Additional function:
The auxiliary contacts isolate the undervoltage release from the power
system on both sides in the event of breaking or a tripping operation and
thus prevent voltage distortion to the control circuit when the switch is in
the off position.
It is possible to reset the circuit breaker/MSP because the contacts reset.
Table 2-5: Attachable accessories