HMG Power Systems Pvt. Ltd. Manufactures Circuit-Breaker with Spring Drive Mechanism. HMG Power Systems Pvt. Ltd. Manufactures HV circuit breaker and its auxiliary equipment, electrical and mechanical components and accessories, On Load Tap Changer [OLTC], High Voltage Disconnector, and Compact Switch gear etc. The Circuit-Breaker with Spring Drive Mechanism is mainly used for outdoor applications. The Circuit-Breaker with Spring Drive Mechanism has Rated voltage of 40.5kV. The Circuit-Breaker with Spring Drive Mechanism has Rated frequency of 50Hz.