·  HOWIN automatic transfer switch is controlled by the ATS controller or AMF module. When the mains is normal, the switch transfers to mains side. When the mains are off, it sends fault indications and time-lapse startup signals to the generator set. After the generator set starts normally and generating voltage becomes steady, transfer the switch to the generating side. If the generating voltage is not stable, the switch will not transfer. After the mains are restored, the time-lapse shutdown signals are sent by the switch.