High Tension Vacuum Circuit Breakers are available in voltage range varying from 3300 volts and 6600 volts. These Vacuum Circuit Breakers are electrically and mechanically interlocked and are offered in non flameproof design. These Vacuum Circuit Breakers are provided with special windows for visual verification of isolator disengagement before opening main chamber for better safety features. High Tension Vacuum Circuit Breakers have the provision of motorized as well as manual spring charging.