... traffic,manufacture,education and so on.KEY FEATURES Digital Design Reversed polarity N and L wire detection ... /W1000VA/800W2000VA/1600W3000VA/2400WAC InputInput systemSingle phase & earth groundRanged voltage220VACFrequency50HZ Voltage range115-300VAC±5Frequency range(45 ... immunitySatisfy YD/T983-1998AInsulating resistance>2MΩ(500VDC)Insulating strength2121VDC( AC input, output to ground ,DC input to ...