| Brand | ROCKWILL |
| Series | KYN28A |
| Rated Voltage | 12 kV |
| Rated Current | 630 A-4000 A |
| Rated Short-time Withstand Current | 20 kA-40 kA |
| Rated Frequency | 50/ 60 Hz |
| Item | Parameter with Unit |
|---|---|
| Rated Voltage | 12 kV |
| Rated Frequency | 50/ 60 Hz |
| Rated Current | 630 A–4000 A |
| Power Frequency Withstand Voltage (1 min) | 42 kV (phase-to-phase and earth), 48 kV (across breaking gap) |
| Lightning Impulse Withstand Voltage (peak) | 75 kV (phase-to-phase and earth), 80 kV (across breaking gap) |
| Secondary Circuit Withstand Voltage (1 min) | 2000 V |
| Rated Short-time Withstand Current | 20 kA / 25 kA / 31.5 kA / 40 kA |
| Rated Short-circuit Making Current (peak) | 50 kA / 63 kA / 80 kA / 100 kA |
| Rated Short-circuit Duration | 4 s |
| Protection Grade | IP4X |
12kV, three-phase AC 50Hz, supporting single busbar and sectionalized single busbar layouts.
Yes. The removable breaker cart enables quick inspection and replacement without full power cut, significantly reducing downtime.
Yes. Features reliable dielectric performance meeting standard power frequency and lightning impulse withstand tests.
Yes. Multiple current and short-circuit withstand options to satisfy various heavy-load distribution requirements.
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