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Yangzhou Ke Yu Electric Power Co., Ltd.

Address: No. 97, Zhongxin Road, Automobile Industrial Park, Yizheng City, Yangzhou City
Phone: 0514-87520111

E-mali:keyudl09@126.com
Website: www.keyudl.com

KW20-12 type outdoor intelligent spring vacuum circuit breaker

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General introduction
KW20-12 outdoor smart spring vacuum circuit breaker is a self-developed company in a box-type spring operating mechanism circuit breakers. Mainly used for breaking, closing the load current in the power system, overload current and short circuit current. Suitable for substation and industrial and mining enterprises in power distribution system for protection and control, more suitable for rural power grids and frequent operation of the place.
The switch adopts vacuum mode arc extinguishing, SF6 gas insulation, excellent overall sealing, internal filled with "zero" gauge pressure SF6 gas, no possibility of gas leakage, high reliability, maintenance-free.
 

Reference Standard

GB1984 AC high voltage circuit breaker
GB/T 11022 High-voltage switchgear and control equipment standard common technical requirements
GB/T 311.1  High-voltage power transmission equipment with insulation
GB/T 3309  High-voltage switchgear at room temperature mechanical test
DL/T 593 Common high-voltage switchgear ordering technical guidance
DL/T 402  AC high voltage vacuum circuit breaker ordering technical conditions

 

The use of environmental conditions
◆Working temperature: -40~+70℃
◆Work environment humidity:0~95%
◆Place of work elevation: ≤3000 m
◆Wind pressure: ≤ 700 Pa
◆Ice thickness:≤10mm
◆External insulation contamination level: Ⅳ
◆seismic intensity:≤ 8°
Note: This product is not suitable for fire, explosion hazard, chemical corrosion and severe vibration and other places. 

 

Model Description
Product model and meaning:

 


 

Technical Parameters

Circuit breaker switch technical parameters

number

Name

unit

Parameters

1

Rated voltage

kV

12

2

Rated current

A

630/1250

3

Rated frequency

Hz

50

4

Rated lightning impulse withstand voltage

kV

Ground 75 / fracture 85

5

Rated short-time power frequency withstand voltage(1min)

kV

Wet test 34, dry test 42 / fracture 48

6

Rated short-circuit breaking current

kA

20/25

7

Rated short circuit breaking times

Times

30

8

Rated thermal current (4s)

kA

20/25

9

Rated dynamic current stability

kA

50/63

10

Rated short-circuit current

kA

50/63

11

Mechanical life

Times

10000

12

Secondary circuit frequency withstand voltage(1min)

KV

2

13

Rated operating sequence

 

O-0.3S-CO-180S-CO

14

net weight

KG

100

Mechanical characteristics parameters

number

Name

unit

Parameters

1

stroke

mm

11±1

2

Contact distance

mm

9±1

3

Overtravel

mm

3±1

4

Closing time

ms

≤60

5

Opening time

ms

≤60

6

Closing different points

ms

≤2

7

Closing bounce

mm

≤2

8

Average opening speed

m/s

1.0±0.2

9

Average closing speed

m/s

0.6±0.2

10

Mechanical number

Times

10000

11

Main circuit resistance

μΩ

≤80

12

Main circuit resistance (with isolation switch)

μΩ

≤ 180

 

Dimensions

 

 

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