Siemens sirius System Manual page 61

3RV1 circuit breakers
2.4 Accessories
2.4.1 Attachable accessories: Overview
Accessories Function/use
Transverse auxi- The contacts of the auxiliary switches close and open together with
liary switch the main contacts of the circuit breaker. Variants:
• 1 changeover contact
• 1 NO + 1 NC contact
• 2 NO contacts
Electronically One transverse auxiliary switch can be attached for each circuit
optimized trans- breaker:
verse auxiliary Variants:
switch • 1 changeover contact
Lateral One lateral auxiliary switch can be attached for each circuit breaker:
• 1 NO + 1 NC contact
auxiliary switch
• 2 NO contacts
• 2 NC contacts
• 2 NO + 2 NC contacts
Alarm switch One alarm switch can be attached at the side of the circuit breakers
Frame sizes with rotary switches.
S0, S2 and S3
The alarm switch has two contact systems:
• One contact system (1 NO + 1 NC) reports a general
tripping operation
short circuit, overload or auxiliary release.
• The other contact system (1 NO + 1 NC) only switches in
the event of a
To reclose the circuit breaker after a short circuit, the alarm switch
must be reset manually after the cause of the error has been elimi-
nated.
Shunt Remote release of the circuit breaker:
release • Via PLC: The coil of the release should be connected to
the voltage only briefly
• Especially suitable for emergency stop disconnection by
means of appropriate emergency stop switches in acc. with
DIN VDE 0113
Undervoltage Trips the circuit breaker in the event of a voltage interruption (e.g.
release when the power plug is removed) and prevents the motor starting up
inadvertently when the voltage returns.
Undervoltage Function and use, see undervoltage release.
release with lea- Additional function:
ding The auxiliary contacts isolate the undervoltage release from the
auxiliary con- power system on both sides in the event of breaking or a tripping
tacts operation and thus prevent voltage distortion to the control circuit
2 NO when the switch is in the off position.
It is possible to reclose the circuit breaker because the contacts
reclose.
2-18
Auxiliary switches, alarm switches, auxiliary releases and other accessories
can be easily attached to the circuit breakers without tools, as required.
, irrespective of whether it was caused by a
tripping operation.
short circuit
Width Attach to
Width of Front
the cir-
cuit
breaker
remains
the same
Left side
9 mm
18 mm
18 mm
18 mm Right side
Accessories
cannot be
attached on
the right of a
circuit
breaker with
a relay func-
tion.
SIRIUS System Manual
GWA 4NEB 430 0999-02b