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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Auxiliary releases
3/26
Siemens LV 36 · 2008
3
■
Overview
Location of accsessory compartments in 3VT2
The particular rated operating voltage of the shunt release is set up by
jumpers located on the right hand side in the release. It is always set to
the maximum value by default.
Type designation of shunt releases
according to the rated operating voltage
Type designation of undervoltage releases
according to the rated operating voltage
• Signaling switch: The switch is located in accessory compart-
ment 1. Its function is to signal the state of the circuit breaker.
• Relative switch: The switch is located in accessory compart-
ment 2. This switch indicates the tripping of the circuit breaker
by releases, the TEST pushbutton or the OFF pushbutton on
the motorized operating mechanism.
• Auxiliary switch: in compartement 3, an auxiliary switch is lo-
cated. Its function is to indicate the switching position of the
main contacts (in the 4-pole version, auxiliary switches can
also be installed in accessory compartments 4,5 and 6). The
leading switches are intended for the make/break function in
advance of the main contacts.
■
Function
Shunt releases
Circuit breaker switched off by the shunt release
Circuit breaker states and toggle positions of the circuit breaker
Order No.
U
e
3VT9 300-1SC00
AC/DC 4, 40, 48 V
3VT9 300-1SD00
AC/DC 10 V
3VT9 300-1SE00
AC 230, 400, 500 V/DC 220 V
Order No.
Rated operating voltage U
e
3VT9 300-1UC00
AC/DC 24, 40, 48 V
3VT9 300-1UD00
AC/DC 110 V
3VT9 300-1UE00
AC 230, 400, 500/DC 220 V
20
20
20
20
30
30
0
1
0
1
0
1
0
1
0
1
t
[ms]
NSO0_00226
2
4
6
1
3
5
3.4 3.3
3.2 3.1
2.4 2.3
2.2 2.1
Main contacts
Auxiliary switch
Auxiliary switch
Relative switch
Relative switch
accessory
compartment
3
accessory
compartment
2
Circuit breaker state
Toggle positions of circuit breaker
Switched on
Switched off by releases, or by TEST
button or by the trip pushbutton on the
motorized operating mechanism
Switched off manually or electrically by
the operating mechanism
A2
10.Y1
A1
A1
U
<
U
<
A2
10.Y2
N-
N-
3VT9 300-1O.00
3VT9 300-1S.00
L+
L+
NSO0_00230
or