This section will help you in understanding the commonly used electrical terms and definitions:
Alternating Current – A flow of electricity that reaches maximum in one direction, decreases to zero, then reverses itself and reaches maximum in the opposite direction. The cycle is repeated continuously.
Alternator: An electric generator that produces alternating current.
Ambient Temperature – The temperature of the surrounding environment. As per industry standards, it is 25° C.
Ampere (A) – Unit of electrical current flow.
American Wire Gauge (AWG) – A standard measure that represents the diameter of wire. The larger the number, the smaller the diameter of the wire.
Basic Insulation Level (BIL) – A reference insulation level that measures the ability of the insulation to withstand very high voltage surges.
Breakdown Voltage – Voltage at which electrical system fails.
Battery – A group of two or more cells connected together to provide electrical current.
Circuit Breaker – A device that detects excessive power demands in a circuit and self interrupts when they occur. Acts as a preventive device.
Conductor – Any material that allows electricity to flow through it.
CU – Copper
Direct Current (dc) – Constant value current that flows in only one direction.
Dual Voltage Switch – A switch used to change the primary voltage of a transformer.
Device – A unit of an electrical system that is intended to carry but not utilize electric energy.
Energy Saving Devices – Devices designed to make use of energy sources more efficiently while providing heating, cooling, and light.
Fault – A short circuit in an electrical system.
Flicker – Impression of fluctuating brightness or color, occurring when the frequency of the observed variation lies between a few hertz and the fusion frequencies of the images.
Fluctuation – A surge dip in voltage amplitude often caused by load switching or fault clearing.
Fuse – A device that will heat up, melt and electrically open the circuit after a period of prolonged abnormal current flow.
Fuse Clearing Time – The total time taken by the fuse to melt and clear the circuit; melting time plus arching time.
Grounded – Connected to earth or to some other conducting body that serves in place of the earth.
Horsepower – The unit of power. It equals 746 watts.
Insulation – A material or object that has a high resistance to the flow of electric current; insulation over underground conductor is made of either EPR or XLPE material.
Inverter – An electrical device designed to convert direct current into alternating current.
Load Switching – Transferring the load from one source to another.
Low Voltage – A wiring system that provides power to some electronic devices operating on a voltage level much lower than the standard 110 volts such as doorbells and thermostats.
LB – Loadbreak
LVDA – Low Voltage Distribution Arrester
Neutral – The junction point of the legs in a Wye circuit.
Outlet – A point on the wiring system at which current is taken to supply utilization equipment.
Peak Demand – The maximum cumulative demand during a time period.
Power Outage – An interruption of power.
Resistor – Any device that limits the flow of current when voltage is applied.
Surge – Transient current or voltage associated with lightning or switching.
Switchgear – A general term that covers switching and interrupting devices and their combination with associated control, metering, protective and regulating devices.
Transfer Switch – An electronic device that will disconnect from one power source and connect to another power source under certain conditions.
Volt (V) – The unit of measure for voltage.
Voltage – The force which causes current to flow through an electrical conductor