Flashcards in Chapter 9 Deck (70)
A device that supplies alternating current
AC power source
Electric current that reverses direction periodically usually 60 times per second
Device used to measure the electrical current in a circuit
A unit of measure of the electrical current flow in an electrical circuit; similar to gallons of water flow in a pipe
A machine component that rotates, slides, or oscillates. Bearings reduce friction between the motor's rotating and stationary parts
A system of one or many electrical components that accomplish a specific purpose.
An electrical component that opens a circuit and stops the flow of electricity when the current reaches unsafe levels.
Materials that have electrons that can break free from the flow more easily than the electrons of other materials.
Electrical current that flows in a single direction through a conductor.
A large electrical switch used for isolation during system repairs and maintenance.
The flow of electrons from one point to another along a pathway called a conductor.
Magnetism produced by an electric current.
Negatively charged particles that orbit the nucleus of an atom.
A rotating blade inside a motor housing or casing that cools the motor by pulling air in through the shroud.
A structure that holds the internal components of a motor and motor mounts.
A device used to protect equipment and electrical wiring from overcurrent.
A device that converts mechanical energy into electrical energy.
A motor that turns slightly slower than the supplied frequency and can vary in speed based on the amount of load.
Any substance that prevents the passage of heat, light, electricity, or sound from one medium to another. Insulators do not conduct electricity.
The amount of torque necessary for a motor to overcome the resistance of the driven machine.
An enclosure that houses the equipment for motor control, including isolation power switches, lockouts, fuses, overload protection devices, ground fault protection, and sometimes meters for current amps and voltage.
Motor control center
A measurement of resistance in electrical circuits.
A device that converts AC voltage to DC voltage.
A material that is neither a conductor nor an insulator.
A casing over the motor that allows air to flow into an around the motor.
Electricity that occurs when a number of electrons build up on the surface of a material but have no positive charge nearby to attract them and cause them to flow.
A stationary part of the motor where the alternating current supplied to the motor flows, creating a magnetic field using magnets and coiled wire.
And electrical device used to start, stop, or otherwise reconfigure the flow of electricity in a circuit.
A motor that runs at a fixed speed that is synchronized with the supply of electricity.