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Power factor is an important test condition for making and breaking capacities test of mining low voltage electromagnetic starter. Combing the reserves of coal resources with the development trend of coal industry, the structure, the application environment and the requirements of making and breaking capacities test for mining low voltage electromagnetic starter are introduced here. At the same time, we analyze the calculation method of power factor and the characteristics of direct reading method and phase angle difference method, design the making and breaking capacities test circuit used for mining low voltage electromagnetic starter, and verify the phase angle difference method used for testing power factor.

Power factor test for making and breaking experiment of mining low voltage electromagnetic starter