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High voltage vacuum circuit breakers serve as critical components in modern power systems, delivering reliable interruption of fault currents while minimizing maintenance. The 40.5KV Vacuum Circuit Breaker is engineered for medium-voltage distribution networks, where its vacuum interrupter technology ensures rapid arc extinguishing and long electrical life. For installations exposed to harsh environmental conditions, the Outdoor Vacuum Circuit Breaker features a weatherproof enclosure and enhanced insulation, making it suitable for pole-mounted or substation perimeter applications. Within indoor switchgear, the 35KV Substation Circuit Breaker provides compact, high-performance switching and protection, often integrated with advanced relay systems. When precise metering and protection coordination are required, integrating a Current Transformer Circuit Breaker enables accurate current measurement and secondary signal output without additional wiring complexity. These solutions combine to form a complete protection scheme that enhances grid stability, reduces downtime, and extends the operational lifespan of connected equipment through clean vacuum interruption and low contact erosion.
The <产品名字> high voltage vacuum circuit breaker incorporates a horizontally mounted vacuum interrupter within a rigid epoxy resin pole assembly. Each phase is housed in a separate insulated cylinder, providing phase-to-phase isolation and excellent resistance to moisture and pollution. The operating mechanism utilizes a motor-wound spring stored-energy system, enabling precise open-close operations with a mechanical endurance exceeding 10,000 cycles. Trip-free functionality ensures that the breaker cannot be held closed against a fault, while the manual emergency trip lever adds an extra layer of operator safety.
| Parameter | Value | Standard |
|---|---|---|
| Rated voltage | 12 kV / 24 kV / 40.5 kV | IEC 62271-100 |
| Rated current | 630 A – 3150 A | IEC 62271-100 |
| Rated short-circuit breaking current | 20 kA – 31.5 kA | IEC 62271-100 |
| Rated short-circuit making current | 50 kA – 80 kA (peak) | IEC 62271-100 |
| Mechanical endurance | 10,000 operations (M2 class) | IEC 62271-100 |
| Electrical endurance at full fault rating | 50 operations (E2 class) | IEC 62271-100 |
| Operating sequence | O–0.3 s–CO–15 s–CO | IEC 62271-100 |
| Ambient temperature range | -30°C to +50°C | IEC 62271-1 |
| Altitude capability | Up to 1000 m (higher with derating) | IEC 62271-1 |
| Humidity tolerance | 95% RH non-condensing | IEC 60068-2-30 |
All contacts within the vacuum interrupter are constructed from copper-chromium alloy, chosen for its superior arc erosion resistance and low chopping current characteristics. The conductive path uses high-purity electrolytic copper, silver-plated at all connection points to reduce contact resistance. Insulating components are manufactured from cycloaliphatic epoxy resin, which delivers exceptional tracking resistance and mechanical strength even under thermal cycling. The <产品名字> design includes optional capacitive voltage indicators and integrated auxiliary switches, simplifying integration into SCADA and remote monitoring architectures. Each unit undergoes routine tests including power-frequency voltage withstand, partial discharge measurement under 1.2 Um/√3, and main circuit resistance verification below 1.2 times the baseline value. Final assembly includes sequential functional checks of the stored-energy mechanism, anti-pump relay verification, and timing measurements for open, close, and reclose operations. This comprehensive validation ensures the breaker meets all performance criteria for utility, industrial, and infrastructure applications where continuous power availability and personnel safety are non-negotiable.
