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Find electrical test equipment terms....
Please select the letter of the term you wish to view, or scroll through our list of electrical test equipment terms.
- P -
Phase
The time relationships between alternating voltages, currents, and impedances. Usually expressed as complex vectors with "real" (in-phase) and "reactive" (out of phase) components.
Polarization
A term used to describe a "one way" limitation on the insertion of a plug into a receptacle for a corded product. A polarized plug can be inserted in only one orientation and cannot be reversed.
Potential
Electrical potential is a term equivalent to "voltage".
Potential Transformer
This kind of transformer will step down high voltage to lower voltage levels for acceptable use by electrical test equipment.
Related to "Potential Transformer":
Electrical Test Equipment
Power
The rate that work is performed for a unit of time. The symbol for power is P.
Related to “Power”:
AC Power Sources
DC Power Sources
Power Converter
A power converter will either convert DC power to AC power or vice versa.
Related to "Power Converter":
AC Power Sources
DC Power Sources
Power Supply
Source of electrical power - A power supply can either be a device or system that supplies electrical power and other energy types:
Related to "Power Supply":
Power Source
- Q -
- R -
Reactive
The component of an AC voltage, current, or impedance that is 90° out of phase with the "real" or in phase component. Reactive components are associated with capacitive or inductive circuits.
Real
The component of an AC voltage, current, or impedance that is in phase with the "real" component. Real components are associated with purely resistive circuits.
Real Power
Real power is measured in kilowatts (kW) and is the electrical power component that performs work.
Related to "Real Power":
AC Power
DC Power
Resistance
The electrical characteristic that impedes the flow of current through a circuit to which voltage has been applied. Resistance is calculated by Ohm's Law as voltage divided by current (for DC circuits). For AC circuits, it is the in-phase or "real" component of impedance. Units are expressed in ohms (Ω).
Related to “Resistance”:
Milliohmmeters
Megohmmeter/Milliohmmeter
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