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GW23-252D outdoor AC high voltage isolating switch
Number of views:
1000

GW23-252D outdoor AC high voltage isolating switch

GW23(GT9)-252D/2500-50 type double column (horizontal fracture) foldable outdoor AC high voltage isolating switch is suitable for AC frequency 50Hz, rated voltage 220kV system, used for high-voltage lines, circuit breakers and other electrical equipment without It can be electrically isolated under load and can also be used for switching operation. It is a mature product recommended by our company for high-voltage power distribution networks. It analyzes the defects of the current isolation switch conductive circuit overheating, operating mechanism failure, and severe corrosion of metal materials. After major improvements, it has been successfully developed. The product has many advantages such as beautiful appearance, simple structure, corrosion resistance, good seismic performance, safe and reliable electrical and mechanical performance.
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Product serial number
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1
Detail
Parameters
Features
Technical Parameter
Case

GW23(GT9)-252D/2500-50 type double column (horizontal fracture) foldable outdoor AC high voltage isolating switch is suitable for AC frequency 50Hz, rated voltage 220kV system, used for high-voltage lines, circuit breakers and other electrical equipment without It can be electrically isolated under load and can also be used for switching operation. It is a mature product recommended by our company for high-voltage power distribution networks. It analyzes the defects of the current isolation switch conductive circuit overheating, operating mechanism failure, and severe corrosion of metal materials. After major improvements, it has been successfully developed. The product has many advantages such as beautiful appearance, simple structure, corrosion resistance, good seismic performance, safe and reliable electrical and mechanical performance.

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1、Advanced friction contact

  • Good conductivity

  • Guaranteed low loop resistance

  • Each contact is equipped with independent spring

  • The spring does not carry current and has a long life

2、The two states of opening and closing can be self-locked and maintained, effectively preventing the dynamic and static contacts from being separated by the influence of wind and electric power;
3、The transmission link adopts oil-free bearing and copper alloy bushing, which has self-lubricating ability, which reduces the rust and jam of the rotating link;
4、Use anti-rust aluminum and stainless steel materials to avoid surface corrosion;
5、Different surface treatment methods are selected according to the place of use, including hot-dip galvanizing and spray painting, Dacromet, nickel-phosphorus alloy composite plating, etc.; for transmission parts, the nickel-phosphorus alloy composite plating process is used, which has better wear resistance than Dacromet;
6、The main switch is a three-pole linkage, with electric and manual operation modes;
7、Equipped with earthing switch

  • Manual operation

  • Same short-circuit current carrying capacity as isolation switch

  • Electrical and mechanical double interlock with isolating switch

8、Configure ice breaker
9、Large contact range of dynamic and static contacts
10、The return spring and clamping spring are used to make the tightening process stable and the clamping force constant and reliable
11、The silver-plated surface is coated with new electronic oil, which effectively delays the oxidation of the silver layer.

Serial number

Name

unit

Parameter

1

Rated voltage

kV

252

2

Rated current

A

2500

3

Isolation switch and ground knife peak withstand current (peak value)

kA

125

4

3s short-term withstand current of isolation switch and grounding knife (effective value)

kA

50

5

Isolating switch main loop resistance

μΩ

≤130

6

1 minute power frequency withstand current (effective value)

On the ground (dry, wet)

kV

395

Fracture

kV

460

7

Lightning impulse withstand voltage (1.2/50μs)

To the ground

kV

950

Fracture

kV

1050

8

Mechanical life of isolating switch and earthing switch

Times

2000 each

Ningbo Tianan (Group) Co., Ltd. was founded in 1969, covers an area of 1298 acres, more than 1800 employees. Is a focus on smart grid, "new infrastructure", "integrated smart energy" and other fields of power distribution switching equipment research and development, production, sales and service of the national key high-tech enterprises.

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