Electric Motor Terminology

AC Motor

Air Gap

Air Over

Altitude

Ambient

Amperes (amps) or A

AFBMA

Armature

Adapter Base or Conversion Base:

Automatic Reset Overload

Bearing Housing

Bearings

Bearing Life

Brakes

Breakaway Torque

Breakdown Torque (BDT)

Breather or Breather Drain

Brush

"C" Flange Or C-Face

Capacitor

Capacitor Motor

Capacitor Start

CSA

Commutator

Conduit or Terminal Box

Conversion Base

Core

DC Motor

Design A, B, C, D - For AC Motors

Dimensions

Drip-proof

Dynamometer

End Bell

Explosion-proof

Design or Design Letter

Drip Cover

Duty Cycle

Motor Efficiency

Electrical Unbalance

Enclosure (ENCL)

Flange or Face

Frame or Frame Size

Frequency - Hertz (HZ)

Full-Load Amps (F.L.A.)

Horsepower

Induction Motor

Inrush Current

Insulation

Insulation Class

Insulation Temperature Rating

KVA Code

Laminations

Locked Rotor Amps (L.R.A.)

Locked Rotor Time or Stall Time

Locked Rotor Torque (L.R.T.)

Manual Reset Overload

Magnetic Polarity

Maximum Run Torque

Meggar Test

NEMA

Maximum Pull Out Torque

Motor Electrical Rating

Open Drip-proof (ODP)

Phase

Poles

Polyphase Motor

Power Factor

Pull Out Torque

Random Wound

Rated Horsepower

Resilient Mounting

Roller Bearing

Rotor

RPM (Revolutions Per Minute)

Service Factor

Sleeve Bearings

Slide base

Space Heaters

Split Phace Start

Surface Temperature

Synchronous Speed Motor

"T" Frame

Thermal Protector

Thrust Bearing

Torque

Totally Enclosed Fan Cooled (TEFC)

Totally Enclosed Non-Ventilated (TENV) -

Totally Enclosed Air Over (TEAO)

Transformer

U" Frame

U.L. (Underwriter's Laboratory)

Voltage Drop

Watt

Wye-Delta Starting