Explosion proof motor is a type of induction motor with explosion-proof performance. Flameproof motor can be used in flammable and explosive places, and it does not produce electric sparks during operation. This three phase asynchronous motor has a structure different from that used in ordinary environments. ATO.com online store offers optional rated power from 750W to 11kW, three kinds of mounting types, 2 pole/ 3 pole/ 4 pole can be chosen. The three phase asynchronous motor has the advantages of beautiful appearance, high efficiency and energy saving, low noise, low vibration, safety and reliability, convenient maintenance.
Explosion proof electric motor is widely used in coal mines, oil and gas, petrochemical and chemical industries, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.
What is Explosion Proof Motor?
Explosion-proof motor is a type of motor with explosion-proof performance. The measures taken are: the electrical equipment cover is installed in a casing, which has a structure that can withstand the explosion pressure of the internal explosive mixture and can prevent the internal explosion from spreading to the explosive mixture around the casing (flameproof type); make the motor Live parts are not likely to generate sparks, arcs or dangerous temperatures sufficient to cause an explosion hazard, or isolate live parts that could produce these phenomena from the explosive mixture so that they cannot come into contact with each other or to the extent that they are explosive (increase safety type, ventilation type, etc.). In all kinds of potentially explosive environments, it is very important to correctly select the explosion-proof motor matched with various types of equipment.
Motors can create an explosion by one of two means:
- A motor surface gets so hot during operation that it ignites a vapor, gas or dust.
- A single arc from a motor malfunction, such as a winding insulation failure or power supply issue, ignites an ambient material.
Explosion proof motors are required for industrial applications with the presence of highly combustible, pervasive materials. Explosion proof does not mean that the motor will never explode, nor that it is immune from external explosions. Rather, an explosion proof motor has features that prevent an internal motor explosion from igniting a larger, ambient, combustible atmosphere.
Explosion Proof Electric Motor Classifications
- Extinguishing type motor
It uses a flameproof enclosure to isolate electrical parts that can generate sparks, arcs and dangerous temperatures from the surrounding explosive gas mixture. However, this kind of casing is not sealed, and the surrounding explosive gas mixture can enter the inside of the motor through the gap between the joint surfaces of the casing. An explosion may occur when it comes into contact with ignition sources such as sparks, arcs, and dangerous high temperatures in the casing. At this time, the flameproof casing of the motor will not only not be damaged or deformed, but also when the explosion flame or hot gas is transmitted through the joint surface gap. Nor can it ignite surrounding explosive gas mixtures.
- Increased safety motor
It is a motor structure that does not produce arcs, sparks or dangerously high temperatures under normal operating conditions, and then takes some mechanical, electrical and thermal protection measures to further avoid arcs, sparks or under normal or approved overload conditions. danger of high temperature, thus ensuring its explosion-proof safety.
- Sparkless motor
It refers to a motor that will not ignite the surrounding explosive mixture under normal operating conditions, and generally will not cause ignition failure. Compared with the increased safety motor, except for the dielectric strength test voltage, winding temperature rise, (the AC winding after reaching the final temperature of rated operation at the highest ambient temperature, from the start of the starting current to the limit Except for the special requirements of the increased safety type, the other aspects are the same as the design requirements of the increased safety motor.
- Dust explosion-proof motor
It means that its casing is designed and manufactured according to the specified conditions, which can prevent dust from entering the motor casing or can not completely prevent dust from entering, but the amount of entry does not hinder the safe operation of the motor, and the accumulation of internal dust is not easy to cause ignition hazards, and it will not be used during use. Motors that cause the explosion of the surrounding explosive dust mixture.