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GIS, circuit breaker, disconnector & its parts |
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1.General Description
ZF12 gas insulated switchgear (GIS) is a new type of switchgear with 3-phase sharing enclosure.
Self-energized are control device is applied for the GIS circuit breaker. The device is so designed that the energy of arc generated is used to improve its arc quenching capability, which leads to a higher breaking capability and a lower operating force needed.
The circuit breaker and earthing and disconnecting switch of the GIS are equipped with spring and motor operating mechanism and operation reliability of the GIS is further improved.
2.main technical Data
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Item |
Unit |
ZF12-72.5 |
ZF12-126 |
ZF12-145 |
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Rated voltage |
kV |
72.5 |
126 |
145 |
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Rated current |
A |
3150 |
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Rated SF6 gas pressure(20℃) |
CB & CT compartment |
Mpa |
0.6 |
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Other compartments |
0.4 |
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Rated peak withstand current (peak) |
kA |
100 |
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Rated short time withstand current (rms) |
kA |
40(3s) |
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Rated short circuit breaking current |
kA |
40 |
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First pole to clear factor |
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1.5 |
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Over voltage multiple of reversal phase |
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2.5 |
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Rated operating sequence |
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O-0.3s-CO-3min-CO |
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Opening time |
ms |
28±4 |
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Closing time |
ms |
80±10 |
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Breaking time |
ms |
≤60 |
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Closing-opening time |
ms |
≤60 |
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Rated SF6 gas pressure (20℃,gauge) |
Mpa |
CB: 0.60; Other: 0.40 |
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Operating mechanism |
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Spring |
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