Mechanical protection of the motor
Different operating conditions or operating conditions of the motor require various protection methods for the motor. The mechanical protection structure of the motor is divided into the following types:
● There is no special protection device for the live part and the rotating part of the open type motor, but the protective net must be added to the fan part.
● The drip-proof motor has a protective cover mounted on the upper part of the live part, and is usually mounted on a hole where something may fall into the motor.
● The protective motor has special protection devices to prevent objects from entering the inside of the motor. This motor does not protect against dust, moisture and gases. Most protective motors have attached fans that are protected and protected against dripping.
The enclosed motor is enclosed (but not sealed) to prevent outside air.
● Anti-drip splash motor prevents water droplets and any direction of water from entering the device inside the motor.
● Explosion-proof motor prevents internal gas explosion from being transmitted to the outside air, so as to isolate explosion-proof or explosion-proof; it adopts special safety and explosion-proof measures for electrical and mechanical safety, which is explosion-proof type.
● The closed slip ring motor rotor slip ring is placed in a special closed box. In this case, the slip ring protection should not be lower than the protection of the motor itself when there are no special provisions for the technical conditions of the order; usually the protection of the slip ring has a higher rating.
● The closed motor body is tightly sealed, and the motor is immersed in water for 4 hours without intrusion of moisture.
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