Zago Electric
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HXGN66-12 AC Metal-Enclosed Ring Main Unit (RMU) is a compact indoor medium voltage switchgear designed for 3.6–12kV power systems. It offers reliable vacuum circuit breaker performance, complete safety interlocking, and efficient power distribution for substations and industrial applications.
Developed in compliance with international standards (IEC 60298, GB3906, DL/T 404), this switchgear features a compact structure, with an overall volume approximately 50% smaller than conventional switchgear. It incorporates a dependable "Five-Prevention" interlocking system to ensure operational safety.
| No. | Item | Unit | Technical Parameters |
|---|---|---|---|
| 1 | Rated Voltage | kV | 3.6 / 7.2 / 12 |
| 2 | Rated Power Frequency Withstand Voltage | kV | 42 (Phase-to-ground), 48 (Isolation) |
| 3 | Rated Lightning Impulse Withstand Voltage | kV | 75 (Phase-to-ground), 85 (Isolation) |
| 4 | Rated Frequency | Hz | 50 |
| 5 | Rated Current | A | 630 / 1250 |
| 6 | Rated Short-circuit Breaking Current (RMS) | kA | 20 / 25 / 31.5 |
| 7 | Rated Short-circuit Making Current (Peak) | kA | 50 / 63 / 80 |
| 8 | Rated Peak Withstand Current | kA | 50 / 63 / 80 |
| 9 | Rated Short-time Thermal Withstand Current (4s) | kA | 20 / 25 / 31.5 |
| 10 | Dimensions (W × D × H) | mm | 900 × 1000 × 2300 |
