34
P P
H
W
D
VD4/US 24
(3)
24
24
50
125
50-60
630
1250
16 (20)
(5)
16 (25)
(5)
20 (25)
(5)
20 (25)
(5)
16 (20)
(5)
16 (25)
(5)
20 (25)
(5)
20 (25)
(5)
40 (50)
(5)
40 (63)
(5)
40 (63)
(5)
40 (63)
(5)
33 ... 60
10 ... 15
43 ... 75
60 ... 80
680
680
653
653
742
742
210
210
125
125
000047
000047
- 5 ... + 40
VD4/US 24
(4)
24
24
50
125
50-60
630
1250
16
16
20
20
16
16
20
20
40
40
50
50
33 ... 60
10 ... 15
43 ... 75
60 ... 80
680
680
653
653
742
742
210
210
125
125
000047
000047
- 5 ... + 40
5.5.12. General characteristics of withdrawable circuit-breakers
for UniSwitch switchgear and UniMix (24 kV) switchgear
(1) Rated current guaranteed with withdrawable circuit-breaker installed in switchgear with 40 °C ambient temperature
(2) The value and duration of the rated short-time withstand current depends on the switchgear. See the specific catalogues of the UniSwitch and UniMix switchgear
(3) The top shutter activation wheels of the UniSwitch switchgear (CBW unit) are mounted and adjusted by the manufacturer of the UniSwitch switchgear
(4) The top shutter activation wheels of the UniMix switchgear (P1/E unit) are available on request
(5) The values in brackets refer to the 12 kV rated voltage.
Circuit-breaker
Standards
Rated voltage
Rated insulation voltage
Withstand voltage at 50 Hz
Impulse withstand voltage
Rated frequency
Rated normal current (40 °C)
(1)
Rated breaking capacity (rated symmetrical
short-circuit current)
Rated short-time
withstand current (3 s)
(2)
Making capacity
Operation sequence
Opening time
Arcing time
Total breaking time
Closing time
Maximum
overall
dimensions
Weight
Standardised table of dimensions
Operating temperature
Tropicalization
Electromagnetic compatibility
UniSwitch
(unit CBW type)
UniMix
(unit P1/E type)
IEC 62271-100
VDE 0671; CEI 17-1 (File 1375)
Ur
[kV]
Us
[kV]
Ud
(1 min) [kV]
Up
[kV]
fr
[Hz]
Ir
[A]
Isc
[kA]
Ik
[kA]
Ip
[kA]
[O - 0.3 s - CO - 15 s - CO]
[ms]
[ms]
[ms]
[ms]
H [mm]
W [mm]
D [mm]
Pole centre distance P [mm]
[kg]
1VCD
[°C]
IEC: 60068-2-30, 60721-2-1
IEC: 60694
5.5.13. Standard fittings for withdrawable circuit-breakers for
UniSwitch and UniMix switchgear
The basic versions of the withdrawable circuit-breakers are three-
pole and provided with:
– EL type manual operating mechanism
– Mechanical signalling device for closing spring charged/discharged
– Mechanical signalling device for circuit-breaker open/closed
– Closing pushbutton
– Opening pushbutton
– Operation counter
– Set of ten circuit-breaker open/closed auxiliary contacts
Note:
with the set of ten auxiliary contacts supplied as standard
and the maximum electrical accessories, three break contacts are
available (signalling circuit-breaker open) and four make contacts
(signalling circuit-breaker closed).
– Lever for manual charging of the closing spring incorporated in the
operating mechanism
– Isolating contacts
– Racking-out/racking-in lever (the quantity must be established
according to the number of pieces of apparatus ordered).
VD4 withdrawable circuit-breaker for switchgear UniSwitch (type
unit CBW) and UniMix (type unit P1/E)
Ur
Isc
Rated uninterrupted current (40°C) [A]
Circuit-breaker type
kV
kA
UniSwitch CBW
UniMix P1/E
P=210
P=210
u/l=310
u/l=310
ø=35
ø=35
16
630 (1)
630
VD4/US 24.06.16 p210
20
630 (1)
630
VD4/US 24.06.20 p210
25
—
630
VD4/US 24.06.25 p210
16
1250 (1)
1250
VD4/US 24.12.16 p210
20
1250 (1)
1250
VD4/US 24.12.20 p210
25
—
1250
VD4/US 24.12.25 p210
Note
(1) 25 kA Isc at the 12 kV rated voltage
P
= Pole horizontal centre distance.
u/l = Distance between bottom and top terminal.
Ø = Diameter of the isolating contact.
24
