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Product Description

GN24-12 model indoor HV disconnect switch applies to power system of rated voltage 12KV, AC 50Hz, it is  used to break  and make circuit under no-load. there are additional pollution abatement type, high altitude type and electrified display.

This series of isolation switches is a three-pole type and consists of a chassis, a shaft, a lever, a porcelain pillar insulator, a knife and a terminal board. The shaft is placed on the base frame, and three pairs of levers are welded on the shaft. The lever is made of a porcelain insulator and a knife necklace. The shaft protrudes from the base frame, any of which can be connected to the operating mechanism.

Working Environment

1.The altitude: 1000m~3000m

2.The ambient temperature: -30°C~40°C
3.The relative humidity of air: monthly≤90°C,daily≤95°C
4.The wind pressure: ≤700pa(wind speed 34m/s)
5.Amplitude: earthquake degree 8
6.Environment degree: degree III
Cannot be use on the condition of the danger of fire and blast, heavy pollution, chemical etching, strong shake etc.


Project

Unit

Parameter

Rated Voltage


KV

12

1 min power frequency withstand voltage

To ground

KV

42

Fracture

KV

48

Lightning impulse withstand voltage (peak)

To ground

KV

75

Fracture

KV

85

Rated frequency

Hz

50

Rated current

A

400          

630

 1000 1250

Rated short-time withstand current

KA

16

 20

 16

20

 25

20 

25

31.5

Rated peak withstand current

KA

40 

 50

40 

 50

  63

50

63

 80

Rated short-time withstand current duration main knife / ground knife

s

4/2

Creepage distance

mm

300~380

Mechanical life

Times

2000


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