VS1-40.5KV/T Indoor High Voltage Vacuum Circuit Breaker – Dedicated VCB for KYN61 Switchgear
The VS1-40.5/T type indoor high voltage vacuum circuit breaker is a premier protection and control unit specifically designed for KYN61-40.5(Z) switchgear systems. Operating at a rated voltage of 40.5kV with a three-phase AC 50Hz frequency, this advanced VCB is ideal for demanding applications in power plants, substations, and industrial mining enterprises. It meets rigorous international standards including IEC56 and GB1984, ensuring reliable performance in locations requiring frequent switching operations.
Product Overview
The VS1-40.5KV/T Type Indoor High Voltage Vacuum Circuit Breaker is a premier control and protection unit specifically engineered for KYN61-40.5(Z) switchgear systems. Operating in three-phase AC 50Hz power systems with a rated voltage of 40.5kV, this VCB is widely used in power plants, substations, and industrial mining enterprises. As one of the most advanced types of power supply and distribution equipment, it is exceptionally suitable for locations requiring frequent operations and offers a maintenance-free interrupting experience.
Key Features
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Seamless Integration: Specifically designed to meet the technical requirements of KYN61-40.5(Z) switchgear.
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High Reliability: Complies with rigorous international and national standards including IEC56, GB1984, and GB11022.
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Durable Performance: Features a mechanical life of up to 10,000 cycles, ensuring long-term operational stability.
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Compact & Lightweight: Designed for easy installation on a trolley, making it ideal for modern, space-efficient distribution networks.
Technical Specifications
Main Technical Parameters
| Item | Unit | Data |
| Rated Voltage | kV | 40.5 |
| Rated Frequency | Hz | 50/60 |
| Rated Current | A | 630 / 1250 / 1600 / 2000 / 2500 |
| Rated Insulation Level (1 min power frequency) | kV | 95 |
| Lightning Impulse Withstand Voltage (Peak) | kV | 185 |
| Rated Short-circuit Breaking Current | kA | 20 / 25 / 31.5 |
| Rated Operating Sequence | O-0.3s-CO-180s-CO | |
| Mechanical Life | times | 10000 |
Mechanical Characteristic Parameters
| Item | Unit | Data |
| Contact Opening Distance | mm | 20±2 |
| Contact Overtravel | mm | 6±1 |
| Average Closing Speed | m/s | 0.6±0.2 |
| Average Breaking Speed | m/s | 1.2±0.2 |
| Contact Closing Bounce Time | ms | ≤3 |
| Circuit Resistance per Phase | μΩ | ≤80 |
Application Environments
To ensure the safety and longevity of the VS1-40.5KV/T, the following ambient conditions should be maintained:
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Ambient Air Temperature: -40°C to +40°C, with a 24-hour average not exceeding 35°C.
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Relative Humidity: Daily average ≤ 95%; Monthly average ≤ 90%.
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Altitude: Not exceeding 1000m.
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Site Requirements: Must be installed in a location free from fire hazards, explosion risks, heavy pollution, chemical erosion, or violent vibration.
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