... Phase: 3-phase, 4-wire7) Connection: Y or other type connection8) Rated speed: 1,500rpm / 1,800rpm9) Excitation: harmonic ... or LED auto controller, indicating lamp, transfer switch,etc.. Automatic transfer switch (ATS) uses update technology, which can be ... automatic control for on-off electricity, remote monitoring, automatic parallel operation,etc…Packing: Wooden case ...