Motors - Hermetic Refrigerant Motor-Compressor - A compressor unit in which the compressor and motor are housed within a single container structure with no external shaft or shaft seals, or the motor is housed within a container structure integral with the compressor structure, so that the motor windings operate within a refrigerant atmosphere.
Locked Rotor Current Rating - A current rating marked on electric equipment or, where not marked, is deemed to be equal to six times the full load current rating from the nameplate of the equipment.
Non-continuous Duty Motor - A motor having characteristics or ratings defined as Short-time duty, Intermittent duty, Periodic duty, and Varying duty (see definition for Duty).
Rated Load Current - (for a hermetic refrigerant motor-compressor) - a value marked on a hermetic motorcompressor intended for use where applicable to ascertain wiring, protection, and control for the unit.
Service, Continuous Duty - Any application of a motor where the motor can operate continuously with load under any normal or abnormal condition of use.
Service, Non-continuous Duty - An application of a motor where the apparatus driven by the motor has the characteristics defined as Short-time duty, Intermittent duty, Periodic duty, and Varying duty (see definition for Duty).
Service Factor - A multiplier that, when applied to the rated horsepower of an AC motor, to the rated armature current of a DC motor, or to the rated output of a generator, indicates an allowed loading that may be carried continuously at rated voltage and frequency.
Motor Controller - The operative units of the control system comprising the starter device(s) and power conversion equipment used to drive an electric motor, or the pumping unit used to power hydraulic control equipment. Operating Device - The car switch, push buttons, key or toggle switch(es), or other devices used to activate the controller.
Signal Equipment - Audible and visual equipment such as chimes, gongs, lights, and displays that convey information to the user.
Motor-Circuit Switch - A switch rated in horsepower. Multi-Winding Motor - A motor having multiple and/or tapped windings, intended to be connected or re-connected in two or more configurations, for operation at any one of two or more speeds and/or voltages. Part-Winding Start Motor - A motor arranged for starting by first energizing part of its primary winding and, subsequently, energizing the remainder of this winding in one or more steps, both parts then carrying current. Motor-Circuit Switch - A manually operated knife or snap switch rated in horsepower fused or unfused.
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