The AT30 industrial PC grade automatic transfer switch is equipped with a high-performance H-type controller and can be used in dual-network and network \u2013 generator standby system applications. The AT30 adopts an anti-void secondary terminal design that makes power source input from the main circuit safe and practical. The H-type controller can monitor voltage loss, phase absence, low voltage, overvoltage, low frequency, high frequency, phase sequence and other parameters of the main network source, while checking whether the standby power source is normal. When the main power circuit is exposed to voltage loss or network failure, low voltage, overvoltage, high frequency, low frequency, phase break, phase sequence and other faults, the switch will automatically be placed on the standby power circuit (adjustable with delay); when the main power source returns to normal condition, the switch will automatically throw the load back to the main power circuit (adjustable with delay).<\/p>\n