HAT530P/HAT530PC series dual power ATS controller consists of microprocessor as the core, can precisely detect voltage (2-way 3-phase/single phase), make accurate judgement on abnormal voltage (power lost, over/under voltage, over/under frequency, loss of phase, reverse phase sequence) and control ATS to transfer after the delay has expired. The controller is applicable for two-stage ATS and three-stage ATS with controlling the start of genset. “Four remotes” (remote control, remote measurement, remote communication and remote adjustment) functions can be realized via RS485 communication port