What is Tefc type motor?

A Totally Enclosed, Fan-Cooled (TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor. An external fan blows outside air over the frame of the motor to cool it.

Are Tefc motors rated for Class 1 Div 2?

Class I, Division 2 Motors 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.

What is a Class 1 Division 2 motor?

Class I, Division 2. This classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used, but which, in the judgment of the authority having jurisdiction, would become hazardous only in case of an accident or of some unusual operating condition.

What is the IP rating for a Tefc motor?

IP55
Totally enclosed, fan-cooled (TEFC) motors often feature IP ratings of IP54 or IP55, which permit a very limited amount of dust to intrude into the motor enclosure and protect the motor against splashing (e.g., IP54) or directed water jets (e.g., IP55).

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 are the 2 motor classifications?

Divisions are determined by the atmosphere that is present under normal operating conditions. Division 1 relates to an atmosphere that normally contains highly combustible material. Division 2 involves a normal atmosphere that is non- combustible, but can change due to an accident or equipment malfunction.

What is a DP motor enclosure?

Drip-Proof/Open Drip-Proof (DP/ODP)—Designed for use on horizontal motors, such as fire pump motors, these prevent drops of liquid or solid particles from entering ventilating openings in the enclosure at any angle from 0 to 15 degrees downward from the vertical.

What are the two types of motor enclosures?

The Most Common Types Of Electric Motor Enclosures

The most common types of enclosures are:
Open Drip Proof (ODP)
Weather Protected (WP1 / WP2)
Totally Enclosed Fan Cooled (TEFC)
Totally Enclosed Non-Ventilated (TENV)
Totally Enclosed Air Over (TEAO)
Totally Enclosed Forced Ventilated (TEFV)
XP (Explosion Proof)

What is the most common type of enclosure used in residential wiring?

NEMA 1 ELECTRICAL ENCLOSURES Despite their limited protection, NEMA 1 enclosures are commonly used in a variety of industries to house indoor electrical equipment, such as variable-frequency drives installed in standard indoor locations.

Which is the best definition of a TEFC motor?

A Totally Enclosed, Fan-Cooled (TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor.

What is the difference between an ODP and a TEFC motor?

NAPCES ODP idler motors are completely safe to use in all indoor industrial settings. On the other hand, a totally enclosed fan cooled, or TEFC motor has a closed off chamber which requires the use of an external fan to blow air over it.

Where is the fan located on a TEFC motor?

TEFC motors are constructed with a small fan on the rear shaft of the motor, covered by a housing. This fan forces air over the motor frame fins, and cools the motor. The enclosure is Totally Enclosed.

What kind of electric motor can I use in Division 2?

Three-phase induction motors with low surface temperatures and no sparking parts can be used in Division 2 locations. As class II locations contain ignitable dusts, electric motors operating in this kind of environment must be dust-ignition-proof.