Consulting electrician: the single cage motor of the construction elevator used in the construction site is 1 1kw*2, and the measured voltage is 370 when it is used in the construction site during the

Consulting electrician: the single cage motor of the construction elevator used in the construction site is 1 1kw*2, and the measured voltage is 370 when it is used in the construction site during the day, and it starts instantly. It is best to start the motor above 10kw with star delta step-down. 1 100KAV transformer can only directly start motors below 30KW. According to the regulations, motors above 7.5KW should be started with reduced voltage, but in actual operation, only motors above 10KW can be started with reduced voltage. Because you start the motor directly with the triangle, the transformer capacity at the construction site may not be enough.