Term
|
Definition
| A bell shaped insulator that is rated for a specific voltage, but can be connected in strings for use on wide range of voltages. |
|
|
Term
|
Definition
| A bus enclosed in pipes filled with SF6 (sulfur hexaflouride) gas. Gas insulates the bus so that it doesn't require as much clearance. |
|
|
Term
|
Definition
| A bus structure comprised of flexible conductors supported by strain insulators. |
|
|
Term
|
Definition
| A bus structure comprised of rigid conductors supported by rigid insulators. |
|
|
Term
|
Definition
| A circuit breaker that uses SF6 gas to extinguish the arc. |
|
|
Term
| Gas Blast Circuit Breaker |
|
Definition
| A circuit breaker that uses a blast of high pressure insulating gas to help extinguish an arc. |
|
|
Term
| Air Blast Circuit Breaker |
|
Definition
| A circuit breaker that uses a high pressure blast of air to extinguish the arc. |
|
|
Term
| Air Magnetic Circuit Breaker |
|
Definition
| A circuit breaker that uses a puff of air and a magnetic field to help extinguish an arc. |
|
|
Term
|
Definition
| A circuit breaker that uses a vacuum to extinguish arcs. |
|
|
Term
|
Definition
| A circuit breaker that uses air and a magnetic field to extinguish the arc. |
|
|
Term
|
Definition
| A circuit breaker that uses oil and an interrupter grid with arc splitters to cool and lengthen arcs until the arcs extinguish at current zero. |
|
|
Term
|
Definition
| A circuit connected to the load side of one or more distribution transformers, and from which a number of service drops are tapped. |
|
|
Term
|
Definition
| A circuit in which resistance is so great that there is no current flow. |
|
|
Term
|
Definition
| A circuit that contains a single path for current to follow. Components in series are connected end to end. |
|
|
Term
|
Definition
| A ciruit that has its electrical source temporarily removed. |
|
|
Term
|
Definition
| A class of nominal system voltages = to or < 100,000V. |
|
|
Term
|
Definition
| A combined effect of resistance, inductance and capcitance on current flow. |
|
|
Term
|
Definition
| A common conductor to which circuits in a substation or switchyard are connected. |
|
|
Term
|
Definition
| A complete path for current, inducing a voltage, source and resistance. |
|
|
Term
|
Definition
| A component in a T&D system whose primary function is to increase or decrease voltage. |
|
|
Term
|
Definition
| A component in a T&D system whose primary function is to route electricity through various circuits. |
|
|
Term
|
Definition
| A component that is put into a circuit to reduce current flow. |
|
|
Term
|
Definition
| A condition where voltage supplied to the system falls below the specified operating range, but above zero volts. |
|
|
Term
|
Definition
| A conductor between a component and a primary line. |
|
|
Term
|
Definition
| A conductor that connects two lines. |
|
|
Term
|
Definition
| A connection used in 3Ø systems in which 3 coils (or resistors) are connected end-to-end so that they effectively form a triangle. |
|
|
Term
|
Definition
| A current that flows through the coil or resistors in a 3Ø system. |
|
|
Term
|
Definition
| A cut on the pole top to prevent standing water. |
|
|
Term
|
Definition
| A defect in a circuit that creates an unintentional path for current to flow to ground. |
|
|
Term
|
Definition
| A defective point in a acircuit that can interrupt the normal flow of current. |
|
|
Term
|
Definition
| A device built in a CSP transformer that is designed to trip open when the current flow exceeds a preset limit. |
|
|
Term
|
Definition
| A device built into a CSP transformer; it isolates the transformer in the event of an internal failure. |
|
|
Term
|
Definition
| A device connected to an establishedground that can open or close the electrical path between a circuit and a ground. |
|
|
Term
|
Definition
| A device consisting of 1 or more electrochemical cells that convert stored chemical energy into electrical energy. |
|
|
Term
|
Definition
| A device mounted on the wall of the building from which service wires are dead ended. |
|
|
Term
|
Definition
| A device that can be attached to a de-energized circuit to provide an electrical path to ground. |
|
|
Term
Remote Terminal Unit
(R.T.U.) |
|
Definition
| A device that controls substation equipment. |
|
|
Term
|
Definition
| A device that protects substation/switchyard equipment from excessive voltage. |
|
|
Term
Coupling Capacitor Voltage Transformer
(CCVT) |
|
Definition
| A device that puts communication signals on power lines between substations or between switchyards and takes signals off the lines. |
|
|
Term
|
Definition
| A device that records substation/switchyard conditions over time. |
|
|
Term
Potential Transformer
(P.T.) |
|
Definition
| A device that reduces line voltage to a proportionally lower voltage for monitoring or relaying. |
|
|
Term
|
Definition
| A device that transmits AC power from one circuit to another by electromagnetic induction. |
|
|
Term
|
Definition
| A device used in a substation to increase or decrease voltage for transmission or distribution. |
|
|
Term
|
Definition
| A device used in a substation/switchyard to detect faults. |
|
|
Term
|
Definition
| A device used in substations to improve system efficiency. Adds inductive load to a T&D system to counterbalance capacitive load. |
|
|
Term
|
Definition
| A device used to adjust voltage. |
|
|
Term
|
Definition
| A device used to indicate electrical values in a substation/switchyard. |
|
|
Term
|
Definition
| A device used to isolate condcutors from other components in an electrical system. |
|
|
Term
|
Definition
| A device, used with CCVTs, that acts as a filter to prevent incoming signals from passing through a substation/switchyard to other power lines and mixing with other signals. |
|
|
Term
| Schematic/Elementary Diagram |
|
Definition
A diagram which shows, by means of graphic symbols, the electrical connections and functions of a specific circuit arrangement. The schematic diagram facilitates tracing the circuit and its functions without regard to the actual physical size, shape or location of the component device or parts. |
|
|
Term
|
Definition
| A diagram which shows, by means of single lines and graphic symbols, the course of an electric circuit or system of circuits and the component devices or parts used therin. |
|
|
Term
| Non-Load-Break Disconnect |
|
Definition
| A disconnect designed to be operated only after a circuit has been de-energized. |
|
|
Term
|
Definition
| A distribution system in which one end of each winding on the dictribution side of a 3Ø substation transformer is connected at a common point and typically connected to a grounded system neutral. |
|
|
Term
|
Definition
| A double angle cut on top of a pole. |
|
|
Term
|
Definition
| A down guy used to back up poles to provide extra support in case of a storm. |
|
|
Term
|
Definition
| A fault that occurs when uninsulated, energized lines cross one another, creating an unwanted electrical path. |
|
|
Term
|
Definition
| A force resisting the relative motion of objects sliding against each other. |
|
|
Term
|
Definition
| A fused cutout component that is installed inside the fuse barrel and becomes part of the circuit when the fuse door is closed. The fuse link melts and separates if the current becomes too high. |
|
|
Term
|
Definition
| A fused cutout in which the entire cutout assembly is exposed. |
|
|
Term
|
Definition
| A fused cutout that has built-in load break capabilities. |
|
|
Term
Enclosed Cutout
(a.k.a. Box-type Cutout) |
|
Definition
| A fused cutout that includes a porcelain box to contain the fuse-barrel assembly. |
|
|
Term
Motor Operated Air Break Switch
(MOAB) |
|
Definition
| A gang switch to which a motor operator has been attached. |
|
|
Term
|
Definition
A general term covering switching and interrupting devices and their combination with associated control, instrumentation, metering, protective, and regulating devices and covering assemblies of these devices with associated interconnections, accessories, and supporting structures used primarily in connection with the generation, transmission, distribution, and conversion of electrical power. |
|
|
Term
|
Definition
| A graphic illustration of 3Ø transformer connections and the primary distribution system. |
|
|
Term
|
Definition
| A grease-like substance used on connections to inhibit oxidation and corrosion. |
|
|
Term
|
Definition
| A group of capacitors that are sometimes used to improve system efficiency. Capacitor banks add capacitive load to a T&D system to counterbalance inductive load. |
|
|
Term
|
Definition
| A guy that runs from crossarm to another pole. |
|
|
Term
|
Definition
| A guy used when an anchor is near the pole. |
|
|
Term
|
Definition
| A high current flow caused by a short circuit. |
|
|
Term
|
Definition
| A load on a T&D system that is commonly caused by very long stretches of power lines. |
|
|
Term
|
Definition
| A measure of how well the medium, or material, can withstand voltage without conducting electricity. |
|
|
Term
|
Definition
A measure of the opposition to current flow that is created by capacitance.
(measured in Ohms Ω) |
|
|
Term
|
Definition
| A metal bracket, curved on one side, flat on the other, used to support a cross arm and provides electrical continuity between a cross arm the pole. |
|
|
Term
|
Definition
| A metal rod driven into the earth to provide a low resistance path for current flow. |
|
|
Term
|
Definition
| A negatively charged subatomic particle. |
|
|
Term
|
Definition
| A network of conductors and ground rods buried in the earth. |
|
|
Term
| Primary Distribution System |
|
Definition
| A part of a distribution system that delivers power at a given voltage from the distribution substation to the distribution transformers. |
|
|
Term
| Secondary Distribution System |
|
Definition
| A part of a distribution system that delivers power at user voltage from a distribution transformer to the customers. |
|
|
Term
|
Definition
| A part of a fuse that melts and interrupts the circuit when excessive current flow occurs. |
|
|
Term
| Overhead Distribution System |
|
Definition
| A part of a power system that includes a distribution substation and components that deliver power from a distribution substation to customers. |
|
|
Term
|
Definition
A physical property of all A.C. circuits that opposes a change in voltage.
(measured in Farads) |
|
|
Term
|
Definition
| A positively charged subatomic particle. |
|
|
Term
|
Definition
| A potentially hazardous condition in which all or part of a circuit is energized, but not from its normal source. |
|
|
Term
| Self-cooled Power Transformer |
|
Definition
| A power transformer cooled by the natural circulation of air. |
|
|
Term
| Gas Sealed Power Transformer |
|
Definition
| A power transformer pressurized with gas to prevent moisture. |
|
|
Term
| Gas/Oil Sealed Power Transformer |
|
Definition
| A power transformer with a 2 part expansion tank mounted along side of the transformer; filled with oil and gas to prevent moisture. |
|
|
Term
|
Definition
| A process that produces voltage due to interaction of a conductor, a magnetic field and relative motion between them. |
|
|
Term
| Load-Break Disconnect Switch |
|
Definition
| A protective device designed to de-energize and isolate a circuit under load; also has arc-extinguishing capabilities. |
|
|
Term
| No-Load Disconnect Switch |
|
Definition
A protective device designed to isolate a circuit after the circuit has been de-energized; has no
arc-extinguishing capability. |
|
|
Term
|
Definition
A protective device that operates automatically to
de-energize a circuit when current levels exceed the rating of the device. |
|
|
Term
|
Definition
| A protective switch that opens a faulted circuit after the circuit has been de-energized by a recloser or other protective device. |
|
|
Term
|
Definition
A right in land created by grant, reservation, prescription or easement which one party or legal entity has in the lands of another.
A non-possessary right, in that the benfiting party does not own or take title to property. |
|
|
Term
|
Definition
| A single angle cut on the top of a pole. |
|
|
Term
|
Definition
| A special type of post insulator constructed in segments. |
|
|
Term
|
Definition
| A specially reinforced structure commonly used at the beginning and end of a transmission line. |
|
|
Term
|
Definition
| A structure for mounting an insulating support. |
|
|
Term
|
Definition
| A substation and switchyard combined in one location. |
|
|
Term
|
Definition
| A support wire that runs from pole to ground. |
|
|
Term
|
Definition
| A switch composed of a set of manual or motor operated switches; used to isolate or connect portions of a distribution circuit. |
|
|
Term
|
Definition
| A switch often used to isolate a power transformer or CB from a circuit so that it can be safely worked on. |
|
|
Term
| Metal-Enclosed Power Switchgear |
|
Definition
A switchgear assembly completely enclosed on all sides and top with sheet metal (except for ventilating openings and inspection windows) containing primary power circuit
switching or interrupting devices, or both, with buses and connections and possibly including control and auxiliary devices. Access to the interior of the enclosure is provided by doors or removable covers. |
|
|
Term
|
Definition
| A switching device, designed for making specified currents and breaking specified staedy state currents. |
|
|
Term
|
Definition
| A system layout in which a circuit extends from a given point and loops back to itself. |
|
|
Term
|
Definition
| A system layout in which a circuit extends out from a source and branches into all parts of area being served. |
|
|
Term
|
Definition
| A system of bare cables that are buried beneath a substation or switchyard to allow abnormal current to be dissipated to the earth. |
|
|
Term
|
Definition
| A system of bare wires strung above a substation/switchyard to provide a path to a grounding grid for static charges or lightning. |
|
|
Term
S.C.A.D.A.
(Supervisory Control And Data Acquisitions) |
|
Definition
| A system that allows dispatchers to monitor and control substation equipment from a central location. Also provides documentation for record keeping. |
|
|
Term
|
Definition
| A system that monitors/controls components used by customers. |
|
|
Term
|
Definition
| A tower with microwave antennas that send and receive information by radio signals between substations or switchyards. |
|
|
Term
Completely Self-Protected Transformer
(CSP Transformer) |
|
Definition
| A transformer that does not require additional protective devices. |
|
|
Term
|
Definition
| A transformer that reduces voltage from the primary winding to the secondary winding. |
|
|
Term
|
Definition
| A trasient wave of current, potential or power that occurs when breakers or switches are opened or closed. |
|
|
Term
|
Definition
A type of circuit breaker in which a vacuum, which is essentially the absence of a medium, is used to resist the flow of arc current so that the arc extinguishes at a current zero |
|
|
Term
|
Definition
| A type of connection that can be made to join two conductors. |
|
|
Term
|
Definition
| A type of disconnect that is designed to break a specific rated load. |
|
|
Term
|
Definition
| A type of guy that runs from one pole to another. |
|
|
Term
|
Definition
| A type of instrument transformer that is designed to carry a customer's load current through its primary coil and then induce a percentage of that current into its secondary coil. |
|
|
Term
|
Definition
| A type of protective equipment designed to provide a path to a grounding grid for lightning or static charges. |
|
|
Term
|
Definition
| A type of switch used to open or close a circuit to route power through a switchyard or to protect substation or switchyard equipment. |
|
|
Term
|
Definition
| A type of tap changer designed to operate with load on a transformer. |
|
|
Term
|
Definition
A unit by which resistance is measured.
1 ohm is the resistance that allows 1 amp to flow in a circuit when there is 1 volt pushing the current. |
|
|
Term
|
Definition
| A unit consisting of single Ø transformers connected together to provide 3Ø power. |
|
|
Term
|
Definition
| A visible discharge of electricity across a gap in a circuit; can be sustained or temporary. |
|
|
Term
|
Definition
| A voltage detector that uses a meter to indicate how much voltage is present in a circuit. |
|
|
Term
|
Definition
| A voltage detector that uses light to indicate the presence of voltage in a circuit. |
|
|
Term
|
Definition
| A voltage detector that uses sound to indicate the presence of voltage in a circuit. |
|
|
Term
|
Definition
| A winding to which the primary voltage is applied. |
|
|
Term
|
Definition
| A wire that runs back to the substation to balance the system voltage. |
|
|
Term
|
Definition
| A wooden pole guy that pushes against a pole rather than pulling on it. |
|
|
Term
|
Definition
| A wrapped wire device used to attach the end of the guy to an attachment on the pole or anchor. |
|
|
Term
|
Definition
| An arrester part that allows surge current, due to overvoltage, to pass to ground. |
|
|
Term
|
Definition
An assembled equipment (indoor or outdoor) including, but not limited to, one or more of switching, interrupting, control, instrumentation, metering, protective, and regulating devices, together with their supporting structures, enclosures, conductors, electric interconnections, and accessories. |
|
|
Term
|
Definition
| An assembly of bus conductors, with associated connection joints and insulating supports. |
|
|
Term
|
Definition
| An electrical insulator that can be polarized by an applied electric field. |
|
|
Term
|
Definition
| An electrical switch that can detect a fault, automatically open to de-energize a circuit and reclose itself at preset time intervals. |
|
|
Term
|
Definition
An electro-mechanical device for measuring the power consumed by a utility customer; commonly referred to as a watt-hour meter. |
|
|
Term
|
Definition
| An insulating support for a bus. A bus support includes one or more insulator units with fittings for fastening to the mounting structure and for receiving bus. |
|
|
Term
|
Definition
| An insulator hung loosely from an eye, intended primarily to carry tension loads. It includeds tangent, dead-end and V-string installations. |
|
|
Term
|
Definition
| An insulator made from fiberglass or other composite materials; lightweight and virtually unbreakable. |
|
|
Term
|
Definition
| An insulator mounted horizontally with a through bolt or vertically on a bracket. |
|
|
Term
|
Definition
| An insulator mounted vertically on structures and cross arms by use of an insulator pin. Generally rated for lower transmission voltages. |
|
|
Term
|
Definition
| An insulator mounted vertically or horizontally on structures and cross arms intended to be loaded in tension, bending or compression. If used in disconnect switch applications, they may also be loaded in torsion. Generally rated for higher voltages. |
|
|
Term
|
Definition
| An ionized path that moves in successive steps towards earth just before a lightning strike occurs. |
|
|
Term
|
Definition
| Anchor with metal cone surrounded by metal leaves at the base. Leaves expand when hammered, holding anchor. |
|
|
Term
|
Definition
| Angle by which a pole deviates from a straight line. |
|
|
Term
|
Definition
| Any mechanism that helps prevent electrical hazards from injuring people or damaging equipment. |
|
|
Term
Branch Line
(Spur Line or Sublateral) |
|
Definition
| Circuit in a distribution system that taps off of a lateral circuit. |
|
|
Term
|
Definition
| Component used to control and/or increase amount of capacitance in an electric circuit. |
|
|
Term
|
Definition
| Crossarm mounted to side of pole. |
|
|
Term
|
Definition
| Current carrying wire that provides a path for the flow of electricity. |
|
|
Term
|
Definition
| Current flow through air, as can occur across an open switch. |
|
|
Term
|
Definition
| Current that always flows in the same direction. |
|
|
Term
|
Definition
| Current that flows in one direction, stops and then flows in the opposite direction. |
|
|
Term
|
Definition
| Current that flows through the wires in a 3Ø system. |
|
|
Term
|
Definition
| Device sometimes used with a fused cutout to protect system equipment by limiting current flor to equipment during a fault or short circuit. |
|
|
Term
|
Definition
| Devices on power transformers that insulate conductors so that the conductors can be connected to the inside of the transformer without coming into contact with the transformer's metal enclosure. |
|
|
Term
|
Definition
| Devices that connect overhead conductors to underground conductors. |
|
|
Term
|
Definition
| Electrical charges that can be created in de-energized line due to friction. |
|
|
Term
|
Definition
| Electrical connection of 2 or more points to reduce any difference of potential. |
|
|
Term
|
Definition
| Fixed electrical path to ground built into an electrical system primarily to protect the system from faults. |
|
|
Term
|
Definition
| Flexible bag inside some conservator tanks that separates air from oil. |
|
|
Term
|
Definition
| Forced Oil/Forced Air Cooled Transformer |
|
|
Term
|
Definition
| Inductor that uses air as the only core material. |
|
|
Term
|
Definition
| Ionization of air molecules surrounding a conductor. |
|
|
Term
|
Definition
| Magnetism that is created by current flowing through a conductor. |
|
|
Term
|
Definition
| Map showing primary, lateral and branch lines, pole #s, distribution equipment and sometimes streets. |
|
|
Term
BIL
(Basic Impulse Level) |
|
Definition
| Measure of the ability of an electrical device's insulation system to withstand very high voltage, short-term surges. |
|
|
Term
|
Definition
| Metal structure where transformer windings are located. |
|
|
Term
| Metal-Enclosed Interrupter Switchgear |
|
Definition
Metal-enclosed power switchgear including the following
equipment as required:
a) Interrupter switches
b) Power fuses (current-limiting or noncurrent-limiting)
c) Bare bus and connections
d) Instrument transformers
e) Control wiring and accessory devices
The interrupter switches and power fuses may be stationary or removable (drawout). When removable, automatic shutters (that cover primary circuit elements when the removable element is in the disconnected, test, or removed position) and mechanical interlocks shall be provided for proper operating sequence.
|
|
|
Term
|
Definition
| Normal line current that bleeds to ground after lightning or switching surge. |
|
|
Term
|
Definition
| Number of cycles completed each second by a given A.C. voltage. |
|
|
Term
|
Definition
| Oil to air self cooled power transformer. |
|
|
Term
|
Definition
| Oil to air/forced air cooled self cooled/forced air cooled power transformer. |
|
|
Term
|
Definition
| On a gas-sealed power transformer, devices that control the flow of gas to a transformer enclosure. Also to reduce the high pressure in a transformer enclosure. |
|
|
Term
|
Definition
| On a power transformer, typically a radiator with finned tubes, combined with fans and housed in a metal shroud. |
|
|
Term
|
Definition
| Pole construction using other devices to support conducors. No crossarms. |
|
|
Term
|
Definition
| Pole construction where insulators are attached directly to the pole vertically, one above the other. |
|
|
Term
|
Definition
| Pole cut made to keep a crossarm from rocking back and forth after bolted to a pole. |
|
|
Term
|
Definition
Power generated by electricity.
Measured in watts.
(Watts = Amps x Volts) |
|
|
Term
|
Definition
| Power lines that carry electricity from generating plants. |
|
|
Term
|
Definition
| Power lines that carry electricity to consumers. |
|
|
Term
|
Definition
| Power that is returning to a power source from a load. |
|
|
Term
|
Definition
| Protective device consisting of a switch, a fuse and a fuse holder. If the current exceeds the limit of the fuse, the fuse will blow so the cutout opens and disconnects a circuit or equipment from the distribution system. |
|
|
Term
|
Definition
| Protective device that allows excess voltage to exit the system. |
|
|
Term
|
Definition
| Protective device that will interrupt the flow of current to equipment under certain conditions, such as transformer failures and secondary short circuits and overloads. |
|
|
Term
|
Definition
| Re-energizing a line that has tripped open. |
|
|
Term
|
Definition
| Safety practice of attaching a tag or label to lines or equipment to let others know the status of an electrical circuit. |
|
|
Term
|
Definition
| Secondary distribution voltage (user voltage). |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Series of pole guys not connected to an anchor. |
|
|
Term
|
Definition
| Service wires from the weatherhead to the meter. |
|
|
Term
|
Definition
Statement of relationship between current, voltage and resistance in an electrical circuit.
I = E/R |
|
|
Term
|
Definition
| Structure or building that contains devices that monitor substation or switchyard consitions. |
|
|
Term
|
Definition
| System voltage in the range of 5kV - 34.5kV. |
|
|
Term
|
Definition
| The amount of voltage or current at the maximum + or - point on a sine wave. |
|
|
Term
|
Definition
The basic unit used to measure electrical energy. 1 watt hour ia the amount of energy used when 1 watt of power is delivered to an electrical device for 1 hour.
(Watt Hours = Amps x Volts x Time) |
|
|
Term
|
Definition
| The flow of electricity through a conductor. |
|
|
Term
|
Definition
The flow of electrons through a conductor.
Measured by voltage and current. |
|
|
Term
|
Definition
| The force or pressure of electricity. |
|
|
Term
|
Definition
| The minimum specified distance between the lowest conductor and ground. |
|
|
Term
|
Definition
The opposition to electric current flow.
(measured in Ohms) |
|
|
Term
|
Definition
The rate at which work is done.
P = I x E |
|
|
Term
|
Definition
| The reduction of voltage as the electric current moves through passive elements of an electrical circuit. |
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| The right to pass over property owned by another party; the path or thoroughfare over which passage is made; that strip of land or corridor over which facilities such as highways, railroads or power lines are constructed and maintained. |
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| The safety practice of creating an electrical path to ground by installing one or more conductors between a de-energized circuit and ground. |
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| The shortest and least resistant path to zero electric potential. |
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| The top of conduit that conatins a customer's service conductors and protects them from the elements. |
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| The unit by which electric power is measured. A watt is defined as the amount of power produced when 1 volt causes 1 amp of current to flow. |
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| The use of electrical devices to energize, de-energize or isolate circuits. |
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| The winding to which a load is connected. |
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| The unit by which voltage is measured. 1 volt is defined as the voltage necessary to drive a current of 1 amp through a resistance of 1 ohm. |
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| Tiny units of matter that contain electrically charged particles. |
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| Transformer that requires the use of independent protective devices. |
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| Two or more electrically connected devices to produce a desired voltage. |
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| Type of bus made with flexible cable. |
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Unit by which electric current is measured.
1 amp is defined as the flow of 6.28 x io^18 electrons past a given point in a second. |
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| Visually checking lines and equipment for signs of damage. |
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| Volt-Ampere output that a transformer can deliver at rated secondary voltage and rated frequency without exceeding its specified maximum temperature rise. |
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Voltage and current used to perform work.
(measured in Watts) |
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| Voltage applied across the resistors or induced in the coils of a 3Ø system. |
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| Voltage that appears across terminals of an arrester furring passage of discharge current. |
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| Voltage that is applied to the wires in a 3Ø system. |
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Voltage x Current
Power used to do work plus power stored during part of a cycle by inductance and capacitance and then returned to the power source. |
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| Wires from a secondary main or secondary of a distribution transformer to a customer's service entrance. |
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| A circuit containing 2 or more parallel paths through which current can flow. |
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