Abstract: When conducting the electrical strength test of Chapters 13.3 and 16.3 of IEC 60335-1, the short-circuit and release energy requirements for the high-voltage power supply capacity of the equipment when the test voltage is≥4000V, the short-circuit current I_s≥200mA, trip current I_r≥100mA. In the JJG 795 verification procedure, only I_r is verified, and I_s is not verified, so the laboratory needs to master a method of verifying I_s. This article understands I_r and I_sfrom the working principle of the high voltage tester, and then introduces the methods of indirect verification and direct measurement of I_s.

Key words: High voltage tester, High voltage transformer, Short-circuit current I_s, Trip current I_r