How to test the electric water heater?
2, security performance testing:Operation method: the heater, the zero line, the fire line and the ground wire are clamped on the zero, fire and ground wire of the test clamp respectively. The test includes two steps, the first step is to test the water heater electric strength and grounding resistance test before the water heater blowing, and then test the water heater, the testing process without water leakage current; second step test of the water heater, the water first before the test, and then press the test button the test, during the test observation of water heater indicator is a hot water outlet, whether.
1, pressure test: according to the pressure test operation rules to perform operation, pressure standard: 1.2Mpa, test time: 5 minutes, test results: no leakage phenomenon.
The test numerical criteria are as follows:(1) electrical strength (withstand voltage): test voltage 1800V, breakdown current: <5mA (before testing must first dry the water inside the heater), test time 2 seconds.(2) grounding resistance: test current 25A, grounding resistance <100m, test time 5 seconds.(3) leakage current: the test voltage shall be 1.06 times the rated voltage, the leakage current value shall be less than 0.75 mA /Kw, the maximum value shall not exceed 5 mA, and the test time shall be 5 seconds. Note: test leakage current must be tested by water first.
