Whatsapp
Modern electrical distribution networks depend on components that deliver consistent arc interruption and weather-resistant performance. The 27.5kV Outdoor Circuit Breaker stands out as a proven solution for substations, renewable integration points, and railway traction systems where exposure to dust, humidity, and temperature swings is unavoidable. Designed around vacuum interrupter technology, this equipment virtually eliminates maintenance of the arc-quenching medium. For operators targeting even sharper coordination and compact design, the 27.5kV Vacuum Circuit Breaker brings precision switching with minimal contact erosion. Across industrial parks and utility-scale installations, the Outdoor High Voltage Vacuum Circuit Breaker delivers compliance with IEC and IEEE standards, supporting both manual and motorized operating mechanisms. A lightweight, high-endurance alternative in this family is the 27.5kV Vacuum Breaker, which simplifies retrofit projects on existing steel structures while maintaining full interrupting ratings. This portfolio addresses the real-world requirements of load switching, fault clearance, and line sectionalizing without the environmental drawbacks of SF6-based gear.
The Outdoor Vacuum Circuit Breaker integrates a sealed vacuum interrupter housed in a corrosion-resistant enclosure rated for decades of uninterrupted service. Its trip-free mechanism guarantees reliable opening even under welded contact conditions, while the spring-operated drive delivers consistent closing and opening speeds down to -40°C. Field crews value the visible isolation gap and integrated earthing switch options, which streamline safety procedures during maintenance windows. Whether deployed as a standalone pole-mounted unit or inside a metal-clad switchgear lineup, the device coordinates seamlessly with microprocessor-based relays for overcurrent, earth fault, and autoreclose schemes, reducing outage durations on critical feeders.
| Parameter | Value | Standard |
|---|---|---|
| Rated frequency | 50 / 60 Hz | IEC 62271-100 |
| Opening time (nominal) | ≤ 30 ms | IEC 62271-100 |
| Arcing time | ≤ 15 ms | IEC 62271-100 |
| Total break time | ≤ 65 ms | IEC 62271-100 |
| Rated operating sequence | O–0.3 s–CO–180 s–CO | IEC 62271-100 |
| Contact resistance (post factory test) | ≤ 35 μΩ | DIN VDE 0670 |
| Insulating medium | Vacuum (pressure ≤ 1.33 × 10⁻³ Pa) | Interrupter sealed for life |
| Auxiliary switch contacts | 8 NO + 8 NC, 10 A at 220 V DC | — |
| Enclosure ingress protection | IP55 (operating mechanism compartment) | IEC 60529 |
| Control interface | Modbus RTU / DNP3 (optional) | Compatible with SCADA |
