Rated Voltage: 36kV Rated Insulation Level:
- Service: Outdoor
- Type: Vacuum Circuit Breaker
- Rated Normal Voltage: 33KV
- Rated Insulation Level:
- Rated Nominal Voltage: 36KV
- Power Frequency Withstand Voltage: 70kV (r.m.s)
- Lightning Impulse Withstand Voltage: 170kV (peak)
- Rated Frequency: 50Hz
- Rated Normal Current: Typically 400A to 2000A
- Rated Short-Time Withstand Current: 16kA to 31.5kA for 1 to 3 seconds
- Rated Peak Withstand Current: 2.5 times the short-time withstand current
- Rated Short-Circuit Breaking Current: 16kA to 40kA
- Rated Short-Circuit Making Current: 2.5 times the rated breaking current
- Rated Operating Sequence: O-0.3s-CO-3min-CO
- Ambient Temperature: 50°C
- Maximum Permissible Temperature: 50°C ambient with operating parts up to 125°C
- Minimum Clearance:
- Between Phases: 400mm
- Between Phase and Earth: 320mm
- Control Voltage: 220V DC ±10%
- AC Voltage Supply: 400V ±10%, 50Hz, 3-phase, 4-wire system
- System Neutral Earthing: Non-effectively earthed through earthing transformer for 33kV systems
- Operating Mechanism: Spring-operated mechanism with anti-pumping and trip-free features
- Class: M2-C2 as per IEC standards (mechanical and electrical endurance)
- Rated Line Charging Current Breaking Capacity: 50A
- Rated Cable Charging Current Breaking Capacity: 50A
- Rated Capacitive Current Switching: Breaking 50A without restrikes
- Rated Small Inductive Current Switching: Breaking currents between 0.5A and 10A without undue overvoltage
- Mechanical Ratings
- Mechanical Endurance:
- Rated for at least 10,000 operating cycles
- Vacuum interrupter life: 100 operations at rated short-circuit current
- Contact Travel:
- Length of moving contact travel and rate of travel not specified but aligned with design requirements.
- Spring Charging Mechanism:
- Motor-operated with manual charging option
- Capable of one Open-Close-Open operation after power failure.