Zago Electric
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KYN28-12 is a 12kV indoor metal-clad withdrawable switchgear for 3.6–12kV AC power systems. It features a mid-mounted withdrawable truck, five-prevention interlock, compartmentalized structure, IP4X protection, and independent pressure relief.
With high interchangeability, low maintenance, and strong safety, it is widely used in power grids, substations, industrial, petrochemical, infrastructure and new energy projects. Fully meets IEC 62271 & GB standards.
| No. | Item | Unit | Technical Parameters |
|---|---|---|---|
| 1 | Rated Voltage | kV | 12 |
| 2 | Rated Frequency | Hz | 50 |
| 3 | Rated Current | A | 630 / 1250 / 1600 / 2500 / 3150 / 4000 |
| 4 | 1 min Power Frequency Withstand Voltage | kV | 42 (48 for Isolation break) |
| 5 | Lightning Impulse Withstand Voltage | kV | 75 (85 for Isolation break) |
| 6 | Rated Short-Circuit Breaking Current (RMS) | kA | 25 / 31.5 / 40 |
| 7 | Rated Peak Withstand Current | kA | 63 / 80 / 100 |
| 8 | Rated Short-Circuit Duration | s | 4 |
| 9 | Degrees of Protection | - | IP4X |
| 10 | Cabinet Height | mm | 2360 |
Note: When using solid-insulated pole-type circuit breakers for 1250A and below, cabinet width can be reduced to 650mm.
