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145kv GIS Switchgear

Brief Description

1.Gas Insulated Switchgear (GIS) is 3-phase AC high voltage switchgear which is used for the control, measurement, protection and switching of transmission lines. Since 1984, more than 5000 bays have been in service, some exported to Thailand, Equatorial Guinea and other countries.

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145kv GIS  Switchgear

Brief Description

1.Gas Insulated Switchgear (GIS) is 3-phase AC high voltage switchgear which is used for the control, measurement, protection and switching of transmission lines. Since 1984, more than 5000 bays have been in service, some exported to Thailand, Equatorial Guinea and other countries.

2.ZF12B -72.5/126/145 (L) GIS contains major substation equipments, such as circuit breaker, disconnector, earthing switch, voltage transformer, current transformer and surge arrester. All components are three-phase in one closure. In ZF12B, the disconnector and earthing switch combined into 3-working-position type DS/ES to optimize the equipment structure and make it more compact.

Main Features

145kv GIS  Switchgear

1. ZF12B series are equipped with 3-working-position type DS/ES, which has the advantages of compactness, flexible configuration, physically mechanical interlock and high reliability.

2. The mechanism is oil/gas free, simple construction, easy maintenance and reliable operation.

3. The enclosure is made of aluminum alloy to ensure light weight, low temperature-rise and strong anti-corrosion.

4. Double sealing systems are adopted to guarantee high reliability in gas tightness and the annual gas leakage rate is leaa than 0.5%.

5. Excellent insulating, conducting and current carrying performances.



Specifications Unit Value
Rated voltage kV 72.5 126 145
Rated current A 2000/3150
Rated frequency Hz 50/60
Rated short-time withstand current (r.m.s) kA 40
Rated peak withstand current kA 100/104
1min rated power frequency
withstand voltage (r.m.s)
To earth & between pole kV 140 230 275
Across isolating distance kV 160 265 315
Rated lightning impulse
withstand voltage (peak)
To earth & between pole kV 325 550 650
Across isolating distance kV 375 630 750
Rated SF6 gas pressure(20℃) CB compartment MPa 0.6
Others MPa 0.4
Rated SF6 annual leakage % ≤0.5

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