Description
VD4 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
Their switching capacity is sufficient to handle any conditions arising from switching of equipment and system components under normal operating and fault conditions, particularly short-circuits, within the parameters of their technical data. The vacuum circuit-breakers of type iVD4, designed in column form, can be supplied both as individual units for fixed installation and mounted on chassis. Vacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.
Advantages
Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. VD4 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives.
|
Rated voltage1)
|
kV
|
12
|
24
|
36
|
40.5
|
|
Rated frequency
|
Hz
|
50 -60
|
50 - 60
|
50 - 60
|
50 - 60
|
|
Rated normal current
|
A
|
630...40002)
|
630.25
|
630...31503)
|
630...31503)
|
|
Rated short-circuit breaking current (symm.)
|
kA
|
16.31.5
|
40
|
50
|
63
|
16.31.5
|
16.4
|
16.4
|
|
Rated short-circuit making current
|
kA
|
40.8
|
100
|
1254)
|
158
|
40.8
|
40.1
|
40.1
|
|
Rated duration of short-circuit4)
|
s
|
3
|
3
|
3
|
3
|
3
|
3
|
4
|
|
Fixed- / withdrawable Version
|
|
• / •
|
• / •
|
• / •
|
• / •
|
• / •
|
• / •
|
• / •
|
|
Max. overall dimensions
(fixed Version)
|
mm
p
H
a
b
c
|
150-275
205-310
450-700
424
461-5996)
|
210-275
310
570-700
424
5996)
|
210-275
310
600-750
459
6088)
|
275
310
750
459
677
|
210-275
310
570-700
424
631-661
|
280/3605)
328
8957)/1000
555/6867)
1575
|
280/3605)
328
8957)/1000
555/6867)
1575
|
|
Weight
|
kg
|
73-105
|
94-180
|
147-260
|
265
|
100-110
|
290-365
|
290-365
|
|
Embedded Pole
|
|
•
|
•
|
•
|
|
•
|
•
|
•
|
|
Assembled Pole
|
|
|
|
|
•
|
|
•
|
•
|
Below is the list of SM6 range units used in MV/LV transformer substations and industrial distribution substations:
- Cable control and protection
- Overhead control and protection
- Transformers and distribution substations
- Motor and transformer control and protection
- Generator control and protection
- Capacitor bank control and protection
