main products: fire current limit alarm protector, metered current limit protector, selective power limit protector, current limit charge protector, self-complex over-undervoltage protector, three-phase four-wire self-complex over-undervoltage protector, electrical fire current limit protector, control and protection switch, phase-loss zero-protecting protector, phase sequence protector, three-phase voltmeter, three-phase ammeter, single-phase programmable ammeter, intelligent power meter, surge protector, dual power supply automatic conversion switch. intelligent harmonic multifunctional power meter, 1 shanghai boyu electric is a high-tech enterprise committed to the research, development, production and sales of high-quality electronic products. contact number 18757770666 the main products are dual power accessories, dual power automatic switching switches, and dual power automatic switching switches. 30 strip
