Knkong Electric Co.,Ltd

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Home    Vacuum Circuit Breaker    ZW20 Vacuum Circuit Breaker

ZW20 Vacuum Circuit Breaker

Outdoor VCB
SF6 gas insulation
12kv,50HZ,630A,1250A
OEM & ODM,Complete equipment
ISO9001:2015,CCC,ISO9001,CE, CB,IEC60898
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Product Introduction

/filedownload/50488ZW20 Series Vacuum circuit breaker consists of three parts: circuit breaker body, operating mechanism and lifting device.The circuit breaker body consists of conductive circuit, insulation system, the seals and housing. The entire conductive loop is formed by in and out wire conducting rod, conductive clip, soft connection and vacuum arcing chamber.

 

This product uses SF6 gas insulation. The inlet and outlet insulating sleeves are integrally cast with epoxy resin silicon rubber. In order to reduce the volume of the switch, A and C phases use a corner bushing to ensure good external insulation. The interior adopts a composite insulation structure, in the case of no SF6 gas charging, it also can reach the corresponding insulation level.

 

This product adopts a mature sealing structure: the mechanism cover and the upper cover of the housing are sealed with a stamping forming groove, and the output pointer shaft is sealed with a double “0” ring, and the inlet and outlet line bushings are integrally cast to ensure good airtightness.

 

Normal service condition:

1. Altitude≤2000;

2. Ambient temperature: -15℃~+50℃

3. Maximum water vapor pressure:24 hours ≤2.2kpa,1 month ≤1.8kpa

4. Wind pressure:≤700pa(34m/s)

5. Earthquake intensity ≤8

6. Ice thickness ≤10mm

7. No fire, explosion danger, chemical corrosion, violent vibration 


Technical Parameters

No.

Item

Unit

Parameter

1

Rated voltage

KV

12

2

Rated frequency

Hz

50

3

Rated current

A

630  1250

4

Power frequency withstand

voltage(Dry\Wet\ isolation fracture)

KV

42\34\48

5

Lightning shock withstand voltage

KV

75

6

Rated short-circuit breaking current

KA

20   25

7

Rated short circuit breaking current breaking times

times

30

8

Rated operating sequence

 

O-0.3s-CO-180s-CO

9

Rated short-circuit closing current

 

KA

50  63

10

Rated short time withstand current

20  25

11

Rated peak value of withstand current

50  63

12

Rated short circuit duration

s

4

13

Mechanical endurance

times

10000

14

Contact allowabled wear thickness

mm

3

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