| In the electric power system high voltage circuit breakers is one of the most important control and protect equipments. It will effect the system in safety and running economy directly > Test of tradition past the method is an usage to give or get an electric shock the bridge method or direct current to press to decline the method to proceed to measure, and the electric current for producing of is only in the mA class which can't broke through the oxidize surface. If the contact resistance is too big, the influence is dependable, and lowered the circuit breakers to break the service life, direct influence of safety production. This device use great switch power supply which can give 100A,Atmel 89C52 8 bit microcontroller ,192*64 LCD ,A/D7135,and serial port printer, to print and save the testing data. Comparing to the traditional method this device has high testing accuracy and high testing speed to fit the testing requirement. Comparing with local of the same kind product this device have the low cost, good characteristics of interface of person and machine, very suit the Chinese state of the nation, and have the value of expansion.
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