Principle (0.5kw-8000kw): YJ/YJS/YJS/P series (fire-fighting) EPS emergency lighting power (0.5KW-8000KW). When the AC shows normally, it will supply the power for load to go through the protection switching device, meanwhile, the charger will charge for the reserve battery. When the AC interrupts or exceeds 25% of the normal voltage, the
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all kinds of furnace transformer, magnetic regulator , rectifier tran