Indoor High Voltage Vacuum Circuit Breaker VS1-12
This indoor high voltage switchgear is designed for three-phase AC 50 Hz systems with a rated voltage of 7.2-12 kV. It features a reliable interlocking function.



Technical Specifications
Product Overview
VS1-12 Indoor Vacuum Circuit Breaker
The VS1-12 series is a high-performance indoor vacuum circuit breaker designed for three-phase AC 50 Hz power systems with a rated voltage of 7.2-12 kV. Featuring advanced solid-encapsulated pole technology, it ensures maintenance-free operation by protecting the vacuum arc-extinguishing chamber from environmental factors. Its modular spring operating mechanism and compact design make it an ideal choice for both fixed installation and handcart assembly in substations and industrial facilities.

Technical Specifications
Available Rated Currents
- 630
- 1,250
- Rated Voltage
- 12 kV
- Rated Frequency
- 50 Hz
- Rated Lightning Impulse Withstand Voltage (Peak)
- 75 kV
- Rated (1 min) Line Frequency Withstand Voltage
- 42 kV
- Rated Operating Sequence
- O-0.3s-CO-180s-CO

Key Features
- Core Benefits
- Maintenance-freeSolid-encapsulated poleUltra-low resistanceModular spring mechanismCompact designReliable interlocking




