Test of Rated Short-time and Peak Withstand Current Above 3. 3 kV Voltage Level

For poor coal mine environment,reliability and safety of power supply system is highly demanded,and anti-transient short-circuit current impact and resistant ability are very important for coal mine explosion-proof electrical products.The paper introduces the experimental devices and inspection and testing process of rated short time and peak withstand current of coal mine explosion-proof electrical appliances above 3.3 kV voltage level.