| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Operation: | Vcb |
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The ZN85-40.5 Indoor High Voltage Vacuum Circuit Breaker is a three-phase AC indoor switchgear device designed for 40.5kV, 50/60Hz power systems. It features advanced vacuum arc-extinguishing technology, providing high reliability, long service life, and excellent switching performance.
This circuit breaker is commonly used in medium and high voltage switchgear, particularly KYN61-40.5 metal-clad switchgear, for control and protection of transformers, generators, and industrial equipment.
It adopts a modular, withdrawable design, making it convenient for installation, maintenance, and replacement. It is suitable for use in power plants, substations, factories, and mining enterprises.
| Type | ZN85-40.5 |
| Rated Voltage | 33kV/40.5kV |
| Power Frequency Withstand Voltage(RMS) | 95kV |
| Lightning Impulse Withstand Voltage(Peak) | 185kV |
| Rated Frequency | 50Hz |
| Rated Current | 1250A,1600A,2000A |
| Rated Short-Time Withstand Current | 25kA,31.5kA |
| Rated Peak Withstand Current | 63kA,80kA |
| Rated Short-Circuit Duration | 4s |
| Rated Short-Circuit Breaking Current | 25kA,31.5kA |
| Rated Short-Circuit Making Current | 63kA,80kA |
| Rated Operating Sequence | O-0.3s-CO-180s-CO |
| Breaking Time | <80ms |
| Rated Short-Circuit Breaking Current Interrupting Times | 20Times |
| Single Capacitor Bank Breaking Current | 630A |
| Back-to-Back Capacitor Bank Breaking Current | 400A |
| Rated Operating Voltage | AC110,220V;DC110,220V |
| Mechanical Life | 10000Times |
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