... 3.Switch turn-on when the use of contact load, no less.4.Had when the OV voltage or under ... the output.5.Power shortage phase or when the load phase lack OL lights, blocking the output.5. ... voltage switch connected to technology, we must take a load before they can move, only join discharge lights (according ... power phase and then there is no shortage of the state of the load, OL lights may be a phase ...