Correct choice of agricultural Electric Motor rated voltage. Motor rated voltage should be selected with the power grid voltage. Three-phase asynchronous electric motor to increase the voltage in the rated voltage of +10% to -5% range will work. Low voltage power grid in rural 220/380V, so in rural areas with small and medium induction motors are low voltage, rated voltage of 220/380V (Δ / Y connection), that voltage is 220V motor using Δ-shaped connection; when the voltage is 380V motor with Y-shaped connection.

This motor also has the advantage that it can adopt Y / Δ start buck. When the motor rated power one-third of transformer capacity, this motor must be reduced voltage starting, need to be stressed is: as long as three-phase power supply in rural areas, must use three-phase motor, which is the same as in the power conditions, the three-phase induction motors and single phase induction motor, compared with a small size, light weight, small vibration and low price.

Protection facilities should be complete. Minimum protection measures should be beneath voltage protection device (the motor is running, if the voltage is too low, current will increase, this long run, the motor will burn due to overheating, so the voltage is too low, should be promptly cut off electrical power, the grid voltage recovery does not allow the starter Hydraulic motor itself, which at low running protection measures called voltage protection. starting voltage protection prevents equipment and personal accident), lack of protection devices, short circuit protection device (when the motor short-circuit fault occurs when the stream is too much short circuit current, the fuse in the fuse melt will automatically cut off power to protect the motors, electrical circuits and electrical equipment), and overload protection device (usually thermal relay to achieve, the motor thermal relay to reflect the status and send a signal overheating, the motor shut down), should also pay particular attention to the motor housing should be reliable access to zero or ground. According to China's "low-voltage electrical installation procedure the user" in the provisions of the motor housing in rural areas should be protected ground, should not be used to protect access to zero.