Why do we need to use explosion-proof motors? Explosion-proof motors are mainly used in harsh environments. In the process environment, the air will contain flammable substances, including gases or dust. When a specific concentration is reached, once an ignition source exists, it may cause fire or explosion. Explosion-proof motors can prevent explosions by isolating heat energy from contact with combustible materials and controlling the operating temperature of the motor. When commonly used sealless magnetic pumps or centrifugal pumps are paired with explosion-proof motors, we can call them explosion-proof magnetic pumps or explosion-proof centrifugal pumps. Choose an explosion-proof motor according to the environment and manufacturing process. The contents of the explosion-proof mark will be explained below.
The explosion-proof mark refers to the mark used to describe the explosion-proof level, temperature group, explosion-proof type and applicable area of explosion-proof electrical equipment.
The more common explosion-proof classification standards mainly include IECEx and ATEX, as well as NEC and CEC.
IECEx: Developed by the International Electrotechnical Commission (IEC), it is an international and globally applicable explosion-proof certification standard. International certification systems help reduce testing and certification costs for manufacturers, allowing the same set of standards to be applied even in different countries. IECEx is also more stringent than ATEX in the certification process.
ATEX: Basically very similar to IECEx, but only used in European countries.
NEC: For use in the United States only.
CEC: For use in Canada only.
The following explains the meaning of each marking of the two major standards IECEx and ATEX.
IECEx Example
ATEX Example
Whether it is temperature, gas, dust, or the environment in which the equipment is located, etc., there are many factors that determine motor specifications. After the above introduction, when selecting explosion-proof motors in the future, you will be able to better understand the meaning of these specifications when selecting explosion-proof motors.
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