A Y series three-phase asynchronous electric starter can be empty, but the current increase sample sizes and three-phase current, motor vibration, noise, heat quickly, significantly reduced starting torque. If the load can not start, connect a power supply, blown fuse immediately.

    Failure Analysis: 

Based on the above phenomenon for the stator windings can be found there were serious short-circuit fault. 

    Common short-circuit fault conditions are: the same with the coil winding inter-turn short circuit; short circuit between two adjacent coils; a very similar between the two ends of the coil windings caused by a very short phase windings; two-phase short circuit between windings. 

    When the stator windings only a few turns short circuit, the motor is starting, but the current increases, three-phase current sample sizes, significantly reduced starting torque, run-time motor vibration, noise and heat quickly. Serious short-circuit when the stator windings, the motor will not start, and a connected power supply, blown fuse immediately. At this point, should overhaul the motor short-circuit fault. 

    Winding short circuit caused by the reasons for this: 

 (1) long-term electrical load in the run-off, long-winding current is too large, so to sear insulation aging, the loss of insulating effect, or subject to vibration and cracking off.

 (2) winding insulation damp, without drying or direct access power supply voltage resulting in insulation breakdown.

 (3) The stator windings of the coil or between the cable pinout bad insulation damage or breakdown, or due to carelessness when wiring to one or more of the coil shorted.

 (4) repair, the result of careless operation of embedded line will be the outer layer of insulation wire or welding wire abrasions, the temperatures are high, a long time, or molten solder drops Burne douter wire insulation .

 (5) long end windings, touch cover, constitute a short circuit.

 (6) winding the end of the bed or double-phase winding insulation pad not good, or puncture damage