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outdoor vacuum circuit breaker

10kV MV Outdoor Vacuum Circuit Breaker/VCB Switch on Pole, ZW8-12(G)

EXZW8-12(G)
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FOB
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1 piece
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1. General description
   EXZW8-12 series vacuum circuit breaker is a H.V. outdoor switch with rated voltage 12kV, tri-phase AC 50Hz, which is mainly used for making and breaking load current, over-current, short-circuit current of rural network, urban network and miniature power system. The overall structure of this product is tri-phase co-box type, tri-phase vacuum explosion chamber in the metal box, the performance is reliable, and the insulation level is strong by making use of SMC insulation material phase to phase insulation and to earth.
   EXZW8-12G consists of ZW8-12 vacuum circuit breaker and isolation blade, called combined circuit breaker, use for breaking switch. The operating device of this series product is VCT23 spring loaded operation mechanism, divided into two kinds of motor operation and manual operation.
   It has the function of surge control, can meet the demands of control and measurement.
   This breaker matches with electronic control unit to realize Four Remote monitor.

2. Main technical parameter

Item

Unit

ZW8-12(G)/630-6.3kA

ZW8-12(G)/630-12.5kA

ZW8-12(G)/630-20kA

Rated voltage

kV

12

Rated current

A

630

Rated short circuit breaking current

kA

6.3

12.5

20

Rated short circuit making current (peak)

kA

16

31.5

50

Rated peak value withstand current

kA

16

31.5

50

Rated short time withstand current

kA

6.3

12.5

20

Rated insulation level 1min P.F. withstand voltage

kV

42

Rated insulation level lightning impulse withstand voltage(peak)

kV

75

Rated operation sequence

O-0.3s-CO-180s-CO

Mechanical life time

time

10000

Rated short-circuit current breaking times

time

30

Rated closing voltage of operation mechanism

V

110,220

Rated opening voltage of operation mechanism

V

110,220

Contact opening distance

mm

11±1

Over travel (spring compressed length)

mm

3±0.3

Tri-phase O/C asynchronous

ms

≤2

Contact closing bounce time

ms

≤2

Average opening speed

m/s

1.0±0.2

Average closing speed

m/s

0.7±0.15

Opening time under max operation voltage

ms

15-50

Opening time under min operation voltage

ms

30-60

Closing time

ms

25-50

Each phase main circuit resistance

μΩ

≤120(with G≤200)

Allowable attrition thickness of moving and fixed contacts

mm

3

Weight

kg

152(with G 180)

Phases center distance

mm

175±1.5

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