CN
KYN28A‑12 is metal‑clad withdrawable switchgear for 12 kV three‑phase 50 Hz power system. It features high current and high breaking capacity, dedicated for power reception, distribution, system control, protection and monitoring. Adopting withdrawable structure for easy maintenance, it can operate independently as outlet switch for high‑voltage generators. It is widely used in power stations, substations and large‑scale industrial‑mining power‑distribution sites.
The product meets domestic and international standards including GB/T 3906, GB/T 11022, IEC 62271‑200.
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Product Parameters |
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Rated voltage |
kV |
3.6 |
7.2 |
12 |
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Frequency |
Hz |
50 |
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Rated current |
Switchgear equipment |
A |
630, 1250, 1600, 2000, 2500, 3150, 4000 |
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Circuit‑breaker |
A |
630, 1250, 1600, 2000, 2500, 3150, 4000 |
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Rated short‑circuit breaking current |
kA |
16, 20, 25, 31.5, 40, 50 |
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Rated short‑time withstand current |
kA/4s |
16, 20, 25, 31.5, 40, 50 |
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Rated peak withstand current (peak value) |
kA |
40, 50, 63, 80, 100, 125 |
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Rated short‑circuit making current (peak value) |
kA |
40, 50, 63, 80, 100, 125 |
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Power‑frequency withstand voltage (1 min) |
Across poles & to earth |
kV |
24 |
32 |
42 |
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Across breaking gap |
kV |
24 |
32 |
48 |
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Lightning impulse withstand voltage (peak) |
Across poles & to earth |
kV |
40 |
60 |
75 |
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Across breaking gap |
kV |
46 |
70 |
85 |
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