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Indoor Medium Voltage Vacuum Circuit Breaker, type VS1-12

                       

            VS1-12 (ZN63) series Indoor Vacuum Circuit Breaker (VCB) with spring-motor operating mechanism is used in Indoor Medium Voltage Switchgears for electrical networks with 3-phase AC current with rated voltage 12 kV rated frequency 50/60 Hz and rated current up to 4000 A. VCB can be used for protection and control of electrical equipment in industrial plants and factories, substations and power stations, minings and in places, where electrical devices work repeatedly and can be used for switching short current. The VCB has maintenance-free high-reliable operating mechanism and long working lifetime. The VCB can be fixed type installation or draw-out type installation having chassis cart and quincunx contacts on it.

Enterprise mode

            Example: Indoor Vacuum Circuit Breaker rated voltage 12 kV, rated short current 31,5 kA, rated current 3150 A, for fixed installation – VS-1-12/3150-31,5-Fixed.

Environmental conditions

Technical parameters 

Name

Unit.

Parameter

1

Rated voltage

kV

12

2

Rated insulation level

1 min industrial frequency voltage withstand

42

Rated lightning impact tolerance voltage

75

3

Rated current

А

630

1250

1600

2000

2500

3150

4000 

4

Rate short-circult breaking current

кА

20

20/31,5

31,5

5

Rated short-time withstand current, 3 sec

20

20/31,5

31,5

6

Rated peak withstand current

50

50/80

80

7

Rated operating sequence

 

O – 0,3 sec – CO - 180 sec – CO

8

Mechanical durability

times

30000

 Installation sizes