Indoor High-Voltage AC Vacuum Circuit Breaker
VTB-40.5(ZN85)
Product Overview
Advanced switchgear designed for reliable power distribution and protection in utility and industrial applications.
Inquire NowTechnical Specifications
| Rated Voltage | 40.5 kV |
| Rated Frequency | 50 Hz |
| Rated Current | 630/1250/1600/2000/2500/3150/4000 A |
| Power Frequency Withstand Voltage(1 min)-Phase-to-Phase/To Earth | 95 kV |
| Power Frequency Withstand Voltage(1 min)-Across Open Contacts | 118 kV |
| Power Frequency Withstand Voltage(1 min)-Auxiliary &ControlCircuit | 2 kV |
| Lightning ImpulseWithstand Voltage-Phase-to-Phase/To Earth | 185 kV |
| Lightning ImpulseWithstand Voltage-Across Open Contacts | 215 kV |
| Rated Short-Circuit Breaking Current | 25/31.5/40 kA |
| Rated Short-Circuit Making Current | 63/80/100 kA |
| Rated Peak Withstand Current | 63/80/100 kA |
| Rated Short-Time Withstand Current | 25/31.5/40 kA |
| Rated Short-Circuit Duration | 4 s |
| Rated Operating Sequence | O-0.3s-CO-180s-CO |
| DC Component of Rated Short-Circuit Breaking Current | 42 % |
| Rated Short-Circuit Breaking Current Endurance | 50 (for 1250A and 31.5kA or below), 30 (for 1600A or 40kA and above) cycles |
| Mechanical Life | 20,000 (for 1250A and 31.5kA or below), 10,000 (for 1600A or 40kA and above) cycles |
| Rated Cable Charging Breaking Current | 50 A |
| Rated Two-Phase Grounding Breaking Current | 21.8/27.4/34.8 kA |
| Rated Out-of-Phase Breaking Current | 6.25/7.87/10 kA |
| Rated Operating Voltage | AC/DC 220V, AC/DC 110 V |
| Vacuum Interrupter Vacuum Level | ≤1.33x10-3 Pa |