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  • ZW8-12 Outdoor High Voltage Vacuum Circuit Breaker Series
Medium Voltage Switch Element

ZW8-12 Outdoor High Voltage Vacuum Circuit Breaker Series

ZW8-12 outdoor high voltage vacuum circuit breaker series are three-phase AC outdoor equipment wi...

  • Product Introduction
  • Product Features
  • Technical Parameters

Product Introduction

ZW8-12 outdoor high voltage vacuum circuit breaker series are three-phase AC outdoor equipment with the rated voltage of 12kV and the rated frequency of 50Hz. They are mainly used to open and close load current, over current and short-circuit current in 12kV system of rural and urban grid as well as other similar places.

Product Features

Environment Temperature: +40℃~ — 25℃

Altitude: not higher than 1000m

Relative Air Temperature: daily average not higher than 95% and monthly average not higher than 90%

Wind Pressure: not higher than 700Pa

Seismic intensity not higher than 8

Installed in places that are free from fire, explosion, severe pollution, chemical corrosion and drastic vibration.

Technical Parameters

Name

Unit

Parameter

Rated Voltage

kV

12

Rated Frequency

Hz

50

Rated Current

A

630

Rated Short-circuit Breaking   Current

kA

6.3

12.5

20

Rated Short-circuit Making Current   (Peak Value)

16

31.5

50

Rated Peak Withstand Current (Peak   Value)

16

31.5

50

Rated Short-time Withstand Current

6.3

12.5

20

Rated Insulation Level

Power Frequency Withstand Voltage   (Dry Type)

kV

42

Lightning Impulse Withstand   Voltage (Peak Value)

75

Rated Short-circuit Breaking   Current Breaking Times

Time

30

Mechanical Life

10000

Rated Operative Sequence

-0.3 s-合分-180s-合分

Rated Making Voltage of the   Operation Mechanism

V

DC/AC 110, 220

Rated Breaking Voltage of the   Operation Mechanism

DC/AC 110220

Clearance between Contactors

mm

11±1

Over-travel (Compression Length of   the Contactor Spring)

mm

3.1±0.3

Three-phase Breaking and Making   Asynchrony

ms

≤2

Making Bounce Time of Contact

≤2

Average Breaking Speed

m / s

1.2±0.3

Average Making Speed

0.6±0.2

Breaking Time

under the   highest operation voltage

ms

≤50

under the lowest operation voltage

≤60

Making   Time

≤100

Resistance of Main Circuits of   Different Phases

υ Ω

≤200

Allowable Accumulated Thickness of   Abrasion of Active and Static Contactors

mm

3