Outdoor High Voltage Vacuum Circuit Breaker

Reliable Outdoor High Voltage Vacuum Circuit Breaker Solutions

When safety and uptime are non‑negotiable, the right switching equipment makes all the difference. Our range spans the specialized 27.5kV Outdoor Circuit Breaker, the high‑performance 27.5kV Vacuum Circuit Breaker, and the compact 27.5kV Vacuum Breaker, all built on the same rugged platform as our broader Outdoor Vacuum Circuit Breaker family. Every unit is engineered to excel in harsh outdoor conditions—from coastal salt fog to high‑altitude substations—delivering consistent interruption, minimal maintenance, and an operating life that routinely exceeds 30,000 mechanical cycles.

The embodies decades of field‑proven design. Its sealed vacuum interrupters eliminate the need for insulating oil or SF6 gas, drastically reducing environmental impact and inspection overhead. A stainless‑steel mechanism housing and epoxy‑resin pole‑mounted insulators ensure corrosion resistance, while the modular operating mechanism supports both motor‑charged spring drive and manual emergency operation. Adaptive trip units with selectable protection curves allow seamless integration into existing protection schemes, and optional remote terminal units (RTUs) enable full SCADA connectivity for real‑time status monitoring and control.

Core Technical Specifications

• Rated Voltage Range: 27.5 kV (other voltages up to 40.5 kV available on request)
• Power Frequency Withstand Voltage: 85 kV (dry) / 75 kV (wet) phase‑to‑earth
• Lightning Impulse Withstand (BIL): 185 kV peak
• Rated Normal Current: 630 A / 1250 A / 2000 A (configurable)
• Rated Short‑Circuit Breaking Current: 20 kA / 25 kA / 31.5 kA
• Rated Short‑Circuit Making Current: 50 kA / 63 kA / 80 kA (peak)
• Operating Sequence: O‑0.3 s‑CO‑3 min‑CO
• Mechanical Endurance: ≥ 30,000 operations
• Electrical Endurance at Full Short‑Circuit Current: 30 interruptions
• Applicable Standards: IEC 62271‑100, ANSI C37, GB 1984, DL/T 402
• Ambient Temperature Range: ‑40°C to +55°C
• Altitude Suitability: ≤ 2000 m (higher altitudes with derating)
• Humidity Tolerance: Up to 100% condensing
• Ice Coating Resistance: Up to 20 mm (tested per IEC 62271‑1)

Detailed Operating Parameters