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Copyright ® Henan pinggao Electric Co.,Ltd         豫ICP备05010380号

Company name: henan pinggao electric co. LTD

Address: Henan province of pingdingshan city

south ring road 22

Mail editor: 467000
E -  mail : pinggao@pinggao.esgcc.com.cn

400-6700-312

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JW8A/8B-550 type Disconnector

Description

JW8A/8B-550 type Disconnector

Brief Description

JW8A/9B-550 grounding switch is for high voltage line under te condition of no load flow or on the maintenance of high voltage bus, circuit breakers and other electrical equipment and reliable electrical grounding with high-voltage lines, and can effectively cut off electromagnetic induction and static electric induction current.

Main Features

1. Plug-in structure, reliable grounding

2. The balancing spring system to balance the breaking-closing heavy torque of the cutter bar and can effectively reduce the operating force

3. Balance spring sealing device, can effectively waterproof and dustproof

Service environment

service environment stable 1

Items

 Specifications

Unit

Value

1

The surrounding air temperature

The Highest temperature

+40

The Lowest temperature

-40

Maximum daily temperature difference

K

25

2

Altitude

m

≤1000

3

Solar radiation indensity

w/m2

1000

4

pollution class

 

III grade、IV grade

5

Icing-thickness

mm

10

6

Wind speed

m/s

34

7

Humidity

Daily average relative humidity

%

≤95

Monthly average relative humidity

≤90

8

seismic intensity

 

9 degree

9

The common mode voltage amplitude which is induced by the opening and closing operation of the main circuit from the auxiliary and control circuit.

kV

≤1.6

10

The installation site should be free of severe vibration and flammable, explosive materials and chemical corrosion.

Product catagories and rated parameters

Product catagories and rated parameters stable 2

Item

Specifications

Unit

Value

I

Structure and type of earthing switch

1

Structural style

 

JW8A-550
Straight lun plug-in

JW8B-550
Straight lun plug-in

Operating mechanism style

 

CJ11 electrically operated mechanism

2

Operating mode

 

Three-phase electric linkage

Electric or mannual

 

Electric and mannual

Motor voltage

V

AC 380 or DC 220

Control voltage

V

AC 380V or AC 220V or
DC 220V or DC 110V

3

Backup auxiliary contact

Yes

8

II

Rated parameters

1

Rated voltage

kV

550

2

Rated frequency

Hz

50

3

Resistance of the main circuit

μΩ

260

4

1min power frequency withstand voltage 

kV

740

Rated lightning impulse withstand voltage peak(1.2/50ms)

kV

1675

The rated operating impulse withstand voltage peak(250/2500ms)

kV

1300

5

Rated short-time withstand current

kA

63

6

rated duration of short-circuit

s

3

7

Rated peak withstand current

kA

160

8

Radio interference level

μV

≤500

9

The switching induced current capacity of the earthing switch

Electromagnetic induction

Reactive current

A

80

400

Induced voltage

kV

2

35

Breaking times

time

10

 Electrostatic induction

Capacity current

A

2

50

Induced voltage

kV

8

50

Breaking times

time

10

10

Opening time

s

12±2

11

Closing time

s

12±2

12

Break-brake average speed

m/s

0.33

13

Closing average speed

m/s

0.33

14

mechanical life

次time

≥2000

15

Assist and control circuit short-time power frequency withstand voltage

kV

2

16

Wiring terminal static mechanical load

Longitudinal

N

4000

Horizontal

2000

Vertical

1500

Safety factor

 

Static state2.75, Dynamic state1.7

17

After closing the earthing switch, the minimum air insulation distance should not less than

mm

3900

18

supporting insulator

Creepage distance

mm

Ⅲgrade:13750、Ⅳgrade:17050

Electric arc distance (dry)

≥3800

S/P

 

≥0.9

Bending resistance

kN

12

 

Corresponding parameter set not found, please add it in property template of background
暂未实现,敬请期待
暂未实现,敬请期待
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