The synchronized closing control technology can completely restrain the surge and overvoltage generated by a circuit breaker randomly closing a power equipment. So it is very important for the stability of transmission and distribution system. The authors analyzed relevant foreign literatures

and collected the data of circuit breakers’ mechanical performances depending on control of voltage

stored spring energy

temperature

idle time

and SF6gas blocking pressure

in order to provide compensatory data for the synchronized closing control of the circuit breaker. A no-load test was conducted under two modes of adaptive compensation and given compensation. In addition

the application of the synchronized closing control technology in engineering is described.