Power system is refers to the national electricity network, such as high voltage transmission also includes 380 v enterprise and agricultural electricity consumption and 220 v household electricity.In the high pressure transmission, if power breakdown, generally we cannot easily achieve outage power testing, we can offer the device which is adapt to high pressure of nondestructive testing.For general industrial voltage and household voltage, electric current and voltage readings can achieve very accurate value, and the device testing the resistance and insulation test can also meet the national standard.At the same time, we can provide equipment which can test the leakage detection , the analysis of the transformer and other special purpose test.