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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Mounting accessories
Withdrawable design
4/40
Siemens LV 36 · 2008
4
■
Design
Withdrawable device
Circuit breaker 3VT9-300-4WA30
in withdrawable design withdrawable device
The withdrawable device of the circuit breaker / switch-discon-
nector is intended for demanding industrial applications where
rapid exchange of the circuit breaker, frequent checking and
both visual and conductive disconnection of the circuit are
needed.
• The withdrawable device includes complete accessories for
assembling circuit breaker/switch-disconnector in withdraw-
able design from the originally fixed-mounted design
• The components of the withdrawable device are:
- supporting part of the withdrawable device
- 2 movable side plates
- 2 connection sets (total of 6 terminals) for fitting onto the
switching unit
- interlocking connecting rod (ensures automatic switching off
of the circuit breaker for handling, inserting and withdrawing)
- a set of mounting bolts is used to fasten the withdrawable
device into the switchboard, and these are include with the
3VT3 763-.AA36-0AA0 switching unit
Main circuit
• The 3VT9 300-4TA30 connecting set is used for connecting
with busbars or cable lugs and is included in delivery of the
3VT3 763-.AA36-0AA0 switching unit
• For connecting in another way, it is necessary to use connect-
ing sets
(see page 4/9)
• The type of connections must comply with our recommenda-
tions
(see page 4/43)
.
Auxiliary circuits
These are connected using the 3VT9 300-4PL00 15-wire cable.
Coding
3VT9 300-4WN00 coding set
The withdrawable device and circuit breaker can be provided
with coding set, which prevents inserting another circuit breaker
into the withdrawable device.
Position signalling
3VT9 300-4WL00 position signalling switch
The withdrawable device can be provided with switches for sig-
nalling the position of the circuit breaker, see table.
Technical specifications
For wiring diagram of the circuit breaker in withdrawable device
with accessories, see page 4/13.
States of 3VT9 300-4WL00 switches in withdrawable design
according to circuit breaker and arrestment positions
0 = contact open, 1 = contact closed
Accessory compartments 19 and 20 are for 4-pole version only.
• Operating state is always in arrested position
• In arrested position, it is possible to lock the withdrawable
device (for more detailed information, see “Advantages and
enhanced safety for operator”)
Type
3VT9 300-4WL00
Rated operational voltage U
e
V AC 400
AC 250
Rated islation voltage U
i
V AC 500
Rated frequency f
n
Hz 50/60
Rated operational current
I
e
/U
e
AC-13
3 A/AC 400 V
DC-15
0.15 A/DC 250 V, 3 A/DC 125 V,
4 A/DC 30 V
Thermal current
I
th
A 6
Arrangement of contacts
001
Connector cross-section S
mm
2
0.5 ... 1
Terminal protection
(connected switch)
IP20
Accessory compartment
11 ... 14
(19, 20)
1)
15,17
(19, 20)
1)
16, 18
Circiut breaker and arrestment
position
Inserted and unarrested
0 1 1 0 0 1
0 1 1 0 1 0
Withdrawn and unarrested
1 0 0 1 0 1
1 0 0 1 1 0
Removed and unarrested
1 0 1 0 0 1
1 0 1 0 1 0
2
1
4
2
1
4
2
1
4