Explosion-proof motors are required for industrial applications with the presence of highly combustible, pervasive materials. … Rather, an explosion-proof motor has features that prevent an internal motor explosion from igniting a larger, ambient, combustible atmosphere.
Are ECM motors explosion proof?
Explosionproof motors are only those approved for Class I locations. Those are the locations where potentially explosive gases or vapors are present as a normal part of a manufacturing process, instead of an unusual condition.
Does Class 1 Div 2 require explosion proof motors?
While Division 1 motors in Class I locations must be explosion-proof, Class II, Division 1 motors must be dust- ignition-proof. … Nameplate require- ments for Class I and Class II locations are essentially the same — the class, group, and T-code of the motor must be clearly displayed.
Is explosion proof the same as Div 1?
The “Combustion” or “Fire” Triangle is used to classify Hazardous Locations in the Explosion-Proof industry. … Division 1 is a subset of Class I and is classified as an area where the explosive or flammable gases, vapors or liquids mentioned above can exist under normal, everyday operating conditions.
What is an exp motor?
Explosion Proof motors are designed for use in hazardous environments having certain explosive gases or materials present. When choosing an Explosion Proof motor, it is important to select a motor that is approved for use in the specific class and group that defines the hazardous environment the motor will run in.
How efficient are ECM motors?
The ECM motor has a minimum efficiency of 70% throughout its entire operating range. Conventional induction motors become less efficient at the reduced speeds that are typically selected for fan powered applications.
What is a Class 1 motor?
Based on these classifications, Class I, Division 1 motors are built to operate in environments routinely exposed to significant quantities of potentially explosive atmospheric gases or vapors. They must be built and labeled as explosion-proof.
Do Motors explode?
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.
How do I know if my motor is explosion proof?
Motors that satisfy UL explosion-proof certification are clearly identifiable by a UL listing identification plate, affixed to the motor enclosure. The plate defines the class, division and group compliance of the motor.
How can you tell if a motor is flameproof?
- Service/class temperatures.
- Reference pressure – waveform smoothing at 5kHz.
- Flame path width and gaps.
- Ignition tests with variety of explosive gas mixtures, five tests per mixture.
- Flame transmission.
- Enclosure strength.
- Enclosure must contain explosions at 1.5 times standard explosive pressure.
What is the difference between Class 1 Division 1 and Class 1 Division 2?
Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.
Can NEMA 4X be used in Class 1 Div 2?
Combine the power of Eaton’s proven Class I Division 2 Groups A, B, C, D hazardous location listed transformers with corrosion resistant NEMA Type 4X enclosures for robust environmental protection in the harshest of applications.
What NEMA rating is explosion proof?
Enclosures resistant to explosion hazards are designed according to much more rigorous standards of durability that NEMA 12 enclosures typically don’t need. If you need explosion-proof performance from your enclosure, you’ll want to go with a NEMA 7 or NEMA 8 rating.
What are the 2 motor classifications?
Class I — Class I locations contain gases and vapors that are known to auto-ignite and cause explosions. Gasoline and acetylene are common examples of such vapors. Class II — Class II locations involve the presence of flammable dust, like grain and coal, in the environment.
What is type of motor?
The electric motor is mainly classified into two types. They are the AC motor and the DC motor. The AC motor takes alternating current as an input, whereas the DC motor takes direct current.
What does explosion proof mean?
The term explosion proof refers to products that are capable of containing an explosion. It does not, however, indicate that the product is capable of withstanding an internal explosion without allowing flames or hot gases to escape and initiate an explosion in the adjacent atmosphere.