ZN85C-40.5/T2000-31.5 Indoor 40.5kV Vacuum Circuit Breaker
ZN85C-40.5/T2000-31.5 Indoor 40.5kV Vacuum Circuit Breaker is a high-voltage switching device designed for three-phase AC 50Hz power systems with a rated voltage of 40.5kV. It is widely used in substations, power plants, industrial facilities, and mining power networks for reliable control and protection of load currents, overload currents, and short-circuit currents.
Featuring a compact vertical structure, epoxy resin insulation design, and an integrated spring operating mechanism, the ZN85C-40.5/T2000-31.5 provides excellent electrical performance, mechanical reliability, and reduced installation space requirements. Its low-maintenance design and stable switching capability make it suitable for high-voltage applications requiring frequent operation, enhanced safety, and long service life.
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The ZN85C-40.5/T2000-31.5 Indoor High-Voltage Vacuum Circuit Breaker is a 40.5kV medium-voltage switching device designed for three-phase AC 50Hz power systems. It is widely used in industrial plants, mining facilities, power stations, and substations for reliable switching and protection of load currents, overload currents, and short-circuit currents.
Featuring an innovative vertical structure with an upper vacuum interrupter and lower operating mechanism arrangement, the ZN85C-40.5/T2000-31.5 significantly reduces installation depth and provides a compact solution for space-limited switchgear applications. Each phase is independently insulated by epoxy resin cylinders, forming a reliable composite insulation structure with enhanced dielectric performance and operational safety.
Equipped with a specially designed spring operating mechanism, the circuit breaker delivers stable switching performance, high mechanical reliability, and long service life. Its compact design, fixed electrical connections, narrow phase spacing, and low-maintenance operation make it suitable for demanding high-voltage applications requiring frequent switching, reliable protection, and efficient space utilization.
Technical Data
| Item | Unit | Parameter | |
| Rated voltage | kV | 40.5 | |
| Rated current | A | 1250 / 1600 / 2000 | |
| Rated Frequency | Hz | 50 | |
| Rated Short-time Withstand Current | kV | 25 / 31.5 | |
| Rated Peak Withstand Current | 63 / 80 | ||
| Rated Short Circuit Breaking Current | 25 / 31.5 | ||
| Rated Short-Circuit Closing Current | 63 / 80 | ||
| Rated Absolute Edge level | 1-minute power frequency voltage (effective value) | 95 | |
| Lightning impulse withstand voltage (peak value) | 185 | ||
| Rated Operating Sequence | / | O-0.3s-CO-180s-CO | |
| Rated Breaking Current of Capacitor Bank | A | 630 | |
| Rated Short-Circuit Breaking Current Breaking Times | Times | 20 | |
| Mechanical Life | 10000 | ||
Overall and mounting dimensions(mm)
