... avoid damage caused to material and equipment by shocks 4)Operating principle WGQ8 intelligent starter adopts three pairs of parallel thyristor ... steady start and point start which are applicable to all kind of loads. 3>two shut down way: SOFT SHUT DOWN and ... voltage, over/under current, overheat, overload, short circuit, open-phase, overheat, communication faults, etc. It will stock the fault data ...