TEFC (Totally Enclosed, Fan Cooled) motors and ODP (Open Drip -proof) motors can be used in Division 2 locations provided they do not have ignition sources such as arc-producing brushes or switching mechanisms.
Is a Tefc motor explosion proof?
The enclosure is “Totally Enclosed”. This means that the motor is dust tight, and has a moderate water seal as well. TEFC motors are not secure against high pressure water nor submersible. They are also not explosion proof without additional modifications.
Are electric motors hazardous?
operated in environments that contain combustible materials. Arcs, sparks, and even high temperatures generated on the surfaces of motors can ignite hazardous substances and cause an explosion. Consequences may range in severity from minor process downtime to serious injury and even death.
Are Tefc motors rated for outdoor use?
A totally enclosed, fan-cooled (TEFC) motor is much more adaptable to outdoor locations and high moisture areas. With a bit of care, you can expect this type of motor to work well and have a long life.
What is a Class 1 Division 1 area?
A Class I, Division 1 area encompasses the combination of Zone 0 and Zone 1 areas. An area where ignitable concentrations of flammable gases, vapors or liquids are present continuously or for long periods of time under normal operating conditions.
Do ODP motors have fans?
Although the ODP motor doesn’t require external cooling (our idler motors have an internal fan) the open concept can allow airborne contaminants and dust to enter the chamber.
What happens if a motor gets wet?
The harm done to motors and generators by flooding extends beyond rusted shafts and contaminated bearings and lubricants. Even brief moisture intrusion can compromise the insulation system, making the windings vulnerable to ground failures.
Are motors rated NEMA?
NEMA enclosure standard for electrical motors
Outdoors installation require the motor to be protected with a cover that does not restrict the flow of air to the motor.
What makes a fan explosion proof?
Explosion-proof fans also use motors that are designed not to produce sparks as they cycle on and off. For added protection, the blades are often made of materials that won’t accumulate static electricity or otherwise become prone to sparking.
What is the difference between EXE and EXD?
Ex d or “Flameproof” means that an enclosure or junction box is constructed and certified as Explosion Protected according to the “Flameproof” standard. … Ex e, on the other hand, means that the enclosure is constructed and certified as “Explosion Protected” according to the “Increased Safety” standard.