Operating conditions for explosion-proof motors and precautions for low-temperature starting
2022-05-09 10:44
Explosion-proof motor The conditions of use are: altitude below 1000 meters, ambient temperature -15--40 degrees, suitable for places without explosion-proof requirements. When using explosion-proof motors in places with lower temperatures, more is required during startup. If the explosion-proof vibration motor is not started as required, a series of problems such as insulation cracking will occur. So let's learn about the use conditions of explosion-proof motors and what to pay attention to when starting at low temperatures!
Factors affecting the starting of explosion-proof motors include: 1. Thermal factors, such as the influence of hot spot temperature during movement; 2. Electrical factors such as the influence of electrical stress caused by operating voltage, overvoltage or atmospheric overvoltage; 3. Environmental factors, such as atmospheric pressure, surrounding gas chemical vibration motor insulation cracking reasons.
In what environment does the explosion-proof motor work?
Explosion-proof motor Motors in Class I environments (UL designation) contain flammable gases, vapors, or liquids and are designed to prevent internal sparks and flames from escaping the servomotor into the hazardous environment. In addition, the temperature of the motor housing does not exceed the safe temperature of the environment in which the gas, vapor, or liquid is present.
Motors in Class II or III environments (UL designation) where dust and fibers are present, the temperature of the motor housing does not exceed the safe temperature of the combustible waste and fiber environment. If the motor is simply operated at a low rated current, the heat generation will be reduced, but other fail-safe methods to limit the motor housing temperature from getting too high include thermostats that cut off the power to the motor before it reaches a critical temperature.
Explosion-proof motor Other technologies are used for other equipment that works in these environments, some of which can be used for purging and pressurization, other explosion-proof housings, encapsulation, and even liquid-filled designs. Regardless of the technology used, the goal is to prevent the motor from igniting an ignition source during normal operating conditions or in the event of a motor malfunction.
If the explosion-proof motor does not work properly, there is also a fault of bearing grease freezing. At this time, if an abnormality occurs during bearing operation and the bearing cannot operate normally, it will affect the operation of the motor, and in severe cases, it will cause a fault in the motor and affect the life of the vibration motor. When the vibration motor is working in a low-temperature environment, attention should also be paid to whether the solder of the lead wire joint is pulverized.
The quality of an explosion-proof motor mainly depends on the quality of the wiring harness. The wire is an important part of connecting the motor operation. Wire joint solder pulverization helps motor operation. The vibration motor should be heated and stored when starting in a cold environment, and the windings and bearings should be strictly checked during operation before starting the explosion-proof motor again.
The above is an introduction to the use conditions of explosion-proof motors and what to pay attention to when starting at low temperatures. If you need to know more, please feel free to contact us!
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