ABB VD4 Installation And Service Instructions Manual page 36

5.5.12. General characteristics of withdrawable circuit-breakers
for UniSwitch switchgear and UniMix (24 kV) switchgear
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
(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.
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).
34
UniSwitch (unit CBW type)
UniMix (unit P1/E type)
IEC 62271-100
VDE 0671; CEI 17-1 (File 1375)
Ud (1 min) [kV]
[O - 0.3 s - CO - 15 s - CO]
P P
H
D Pole centre distance P [mm]
W
IEC: 60068-2-30, 60721-2-1
VD4/US 24 (3)
Ur [kV] 24
24
Us [kV]
50
Up [kV] 125
fr [Hz] 50-60
Ir [A] 630 1250
16 (20) (5) 16 (25)
Isc [kA]
20 (25) (5) 20 (25)
16 (20) (5) 16 (25)
Ik [kA]
(5)
20 (25) 20 (25)
(5)
Ip [kA] 40 (50) 40 (63)
40 (63) (5) 40 (63)
33 ... 60
[ms]
[ms] 10 ... 15
[ms] 43 ... 75
[ms] 60 ... 80
H [mm] 680 680
653 653
W [mm]
D [mm] 742 742
210 210
[kg] 125 125
1VCD 000047 000047
- 5 ... + 40
[°C]
IEC: 60694
VD4 withdrawable circuit-breaker for switchgear UniSwitch (type
unit CBW) and UniMix (type unit P1/E)
Ur Isc Rated uninterrupted current (40°C) [A]
kV kA UniSwitch CBW
P=210
u/l=310
ø=35
16 630 (1)
20 630 (1)
25 —
24
16 1250 (1)
20 1250 (1)
25 —
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.
VD4/US 24 (4)
24
24
50
125
50-60
630
(5) 16
(5) 20
(5) 16
(5)
20
(5)
40
(5) 50
33 ... 60
10 ... 15
43 ... 75
60 ... 80
680
653
742
210
125
000047
- 5 ... + 40
Circuit-breaker type
UniMix P1/E
P=210
u/l=310
ø=35
630 VD4/US 24.06.16 p210
630 VD4/US 24.06.20 p210
630 VD4/US 24.06.25 p210
1250 VD4/US 24.12.16 p210
1250 VD4/US 24.12.20 p210
1250 VD4/US 24.12.25 p210
1250
16
20
16
20
40
50
680
653
742
210
125
000047