Below is a discussion on how to prevent fire and explosion in CT4 motors.
2023-02-03 14:47
CT4 motor What are the fire and explosion prevention measures for CT4 motors?
CT4 motors are used in flammable and explosive environments, requiring high manufacturing technology. However, the production process uses a large number of electrical instruments, and various sparks from friction, mechanical wear, static electricity, and high temperatures are unavoidable, especially during instrument and power failures. Therefore, it is necessary to understand some fire and explosion prevention measures for CT4 motors.
The fire and explosion prevention of the motor should be noted.
(1) When the motor is overloaded, causing the casing to overheat, and the current exceeds the rated current value, quickly determine the cause.
(2) Poor contact or looseness at the contact points of the motor wiring, leading to insulation damage, short circuits, and burning.
(3) Mechanical friction: such as bearing friction. The allowable temperature of the bearing is: sliding bearing not exceeding 80℃, rolling bearing not exceeding 100℃. Otherwise, the bearing will wear out. After the bearing wears out, the rotor and stator will rub against each other, and the temperature of the friction part can reach over 1000℃, destroying the insulation of the stator and rotor, causing short circuits and electric arc sparks.
(4) Single-phase operation of a three-phase motor is very dangerous. In mild cases, it may cause the motor to burn out; in severe cases, it may cause a fire.
(5) Inter-turn or inter-phase short circuit or grounding of the motor.
(6) If the motor grounding is poor, the casing will be energized, so the casing must have good grounding protection.
When do you need a CT4 motor?
Some production workshops generate flammable and explosive gases or dust during production. If certain conditions are met, an explosion will occur. These places need to install CT4 motors.
The CT4 motor is an explosion-proof device used in gas and dust environments because it has a robust explosion-proof casing that can withstand the enormous energy generated by gas or dust explosions without harming the surrounding environment.
CT4 motors are mainly used in environments with potential or direct hazards and explosive gases, dust, or vapors. The use of CT4 motors is also common in industries such as painting and pharmaceutical printing, which have a certain explosion risk.
The main dangers in painting workshops come from paint mist, which is a flammable and explosive substance that can easily cause fires or explosions. Pharmaceutical workshops use a large number of volatile chemicals or organic substances. When these dangerous components reach a certain concentration and encounter an open flame, even a small spark can cause an explosion. Therefore, these workshops need CT4 motors.
The protection level of the 4CT motor should be moderate; do not choose one that is too high, nor should you choose a machine that is completely unsuitable for your conditions to save money. The indicators of the machine should be determined according to the usage environment; these are not fixed.
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