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ZF11-252 GIS
ZF11-252 GIS

Member Details

PINGGAO GROUP HIGH VOLTAGE SWITCHGEAR CO.,LTD.

Pingdingshan,Henan,China

  • Product Details
  • Company Profile

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 ●Brief Description

  ZF11-252(L) GIS is researched and developed independently by us based on the conclusion of previous GIS.

  ZF11-252 (L) GIS contains major substation equipments, such as circuit breaker, disconnector, earthing switch, current transformer, voltage transformer, lighting arrestor in the grounded aluminium alloy enclosure and common-enclosure busbar. The circuit breaker adopts the perfect nozzle to strengthen the arc crack ionization after the separation of contacts and improve the insulator between contacts to restore the strength after the crossing of short current zero. All compartments have been standarized and available to make different combination according to the consumers’ requirements.

  ●Main Features

  1 High current carrying capacity

  The rated current of ZF11-252(L) GIS is 4000A. By introducing the automatic silver-coating line, all electrical contacting surface is automatically silver coated to ensure even thickness, high hardness, strong adhesion and high current capacity.

  2 Aluminum enclosure with low temperture and strong anti-corrosion

  GIS enclosure is made of high strength aluminum alloy with light weight, low temperature rise and strong anti-corrosion property.

  3 Excellent insulating property

  All insulators are made by automatic casting line introduced from Hunbers, Germany. X-ray examination, mechanical tests, power frequency withstand voltage test, partial discharge test shall be performed on all insulators before the sealing package.

  4 Outstanding Sealing Property

  Optimized design technology is adopted to guarantee the sealing property and prolong the endurance of sealing device to prevent the leakage.

  ● Technical parameters

    Specifications

 Unit

Value

Rated voltage

kV

252

Rated current

A

3150/4000

Rated frequency

Hz

50/60

Rated short-time withstand current (r.m.s)

kA

50

Rated peak withstand current

kA

125

1min rated power frequency withstand voltage (r.m.s)

To earth & between pole

kV

460

Across isolating distance

kV

530

Rated lightning impulse withstand voltage (peak)

To earth & between pole

kV

1050

Across isolating distance

kV

1200

Rated SF6 gas pressure(20℃

CB compartment

MPa

0.6

Others

MPa

0.45/0.5

Rated SF6 annual leakage

%

≤0.5

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