NRSH-C insulating oil dielectric loss tester is a high-precision, digital industrial instrument developed by Wuhan Nanyue Electric Co., Ltd. in accordance with IEC and national regulations, based on its own technical advantages. The instrument adopts high-frequency induction heating technology, uniform heating, fast heating speed and short time. The single-chip microcomputer is used for control and calculation to realize automation, high accuracy of capacitance and loss measurement, stable data and good repeatability. The output voltage is 0-2000V continuously adjustable, suitable for the different voltage levels of different test samples. It is widely used for the measurement of dielectric loss of transformer oil, capacitor oil and cable oil.