Control back to the routing control transformers and start, stop buttons

Mine appliances no specific test methods, but generally have mine electrical explosion-proof enclosure, its environment and general electrical different, especially the electrical operating characteristics of a great relationship test and the ambient temperature, the direct use is not entirely suitable. On mine explosion magnetic starter operating characteristic test some comments. Mine explosion-proof  Air circuit breaker  with main circuit isolation (or reversing) switch, main contactor, protector. The control back to the routing control transformers and start, stop buttons. This test involves only operating characteristics and the main contactor  electric meter . Temperature rise test case for the combination of product. Mine anti-Na magnetic starter face trial methods, mining anti-Na magnetic starter test even the capacity of the test power requirements should be  power transformers , the resistance should be small enough. In the determination of operating characteristics of the process, the power supply voltage fluctuations on the no-load voltage should be less than 5% in terms of, for the DC power supply voltage is also required to access the test electrical load conditions ripple factor is less than 5%, AC power voltage shall be substantially sinusoidal, the power frequency test appliances should be rated frequency tolerance ± 5%.