Electrical field the region around a charged body in which the charge has. The symbols represent electrical and electronic components. What does it mean when one wire goes into load, and one goes into line. You may view definitions of glossary items by click ing on terms and words that are underlined and italicized in the text. Load anything which consumes electrical energy, such as lights, transformers, heaters and electric motors. Understanding the terms and definitions of ldo voltage regulators. Lines of force invisible lines which conveniently illustrate the. That is, loading a generator means drawing current from it. This booklet is designed to help you become familiar with electrical terms commonly used in the. In case of dc, load is described by level of current. Sendingend port a a b b transmission line generator. We are committed to excellence, leadership and customer service. Load lines, 19661988 international convention on load lines, 1966, as amended by the protocol of 1988 articles of the international convention on load lines, 1966 article 2 definitions article 2 definitions. Load line analysis for a diode circuit i versus v d a plot of the current, i, versus the voltage drop across the diode, v d, will yield a straight line, called the load line, of possible values of current flow in the circuit.
Load is the wire going from the switch to the device. The load schedule is usually categorised by switchboard or occasionally by subfacility area. Put another way, the part of a circuit that connects to a welldefined output terminal is considered an electrical load. Normally open and normally closed these terms refer to the position taken by the contacts in a magnetically operated. Examples include a lightbulb, a resistor and a motor. Note that the capacitive load tries to increase the voltage. Definitions of household electrical terms glossary. As you progress in the electrical trade youll hear a bunch of electrical terms being tossed around like their common knowledge. This manual provides the most relevant and uptodate information related to transmission line structural loads. The load is the horizontal line, connected between two pairs of intersecting lines. Impedance is most accurately defined as resistance in ohms but is commonly referenced in terms of percent when combined with the system voltage and line current flowing through the reactor. Definitions of electrical terms you should know electrician. This creates extra load on utility lines and increased heat of utility transformers and may cause stability problems to the entire ac line. Typical electrical drawing symbols and conventions.
Fortunately for you ive grouped them together to help you become a better electrician. Fundamentals of electricity welcome to module 2, fundamentals of electric ity. Traditional switched mode power supplies draw current from the ac line in short pulses, and as a result, the input current of such basic switched mode power supplies has high harmonic content. Does load mean a heavy heap of something a truck hauls. Guidelines for electrical transmission line structural loading. A second meaning for load is the magnitude of the energy consumed by. Electrical symbols and electronic circuit symbols are used for drawing schematic diagram. In the books of electrical machines, it is written that at leading pf load i. Adapter a cord or block style device with different ends that allows different devices to connect ac alternating current. Electrical symbols electronic symbols schematic symbols. Distribution feeder systems electrical engineering portal. A is the cutoff point and b is the saturation point.
This means you dont consider linetoline loads when sizing the grounded neutral conductor. The terms are used in the context of a single device and electrical box, so that the wires that deliver power into the box are described as the line wires, the upstream wires, or the incoming wires, while the wires passing onward to other devices are described as load, downstream, or outgoing wires. Understanding the terms and definitions of ldo voltage. It takes years to get firm understanding of what they all mean. Line is power in and load is power out, as another answer said. For example, a conventional wall switch which is a singlepole, singlethrow switch works equally well whether you attach the live circuit wire line to the top brass terminal or the bottom because the switch has only two positions. Understanding the terms line and load in electrical. I relearned some electrical terms today that may be useful later when working with gfci circuits. The neutral load is the maximum unbalanced demand load between the grounded neutral conductor and any one ungrounded hot conductor as determined by the calculations in art. They are also used to connect high voltage equipment at electrical switchyards, and low voltage equipment in battery banks. Electricity tariffs circuit globe all about electrical. Glossary of electric systemrelated terms learning center.
Glossary of home electrical terms the circuit detective. I think i am using electrical terms in this website according to their usual meanings by both electricians and homeowners. Basic electrical fundamentals voltage, current kilowatts, kilovolt amps. The essential data achieved from a load flow study is the magnitude and phase angle of the voltage at every feeder and bus, and the real and reactive power flowing in every line 5, 6. With the switch on, the power travels through the load in this case, a light bulb filament, and back on the neutral, but no connection to the grounded buss bar, and that is how you get a shock from a neutral. Understanding the terms and definitions of ldo voltage regulators 5 5 transient response the transient response is the maximum allowable output voltage variation for a load current step change. For example, a conventional wall switch which is a singlepole, singlethrow switch works equally well whether you attach the live circuit wire line to the top brass terminal or the bottom because the switch has only two positions open or closed.
You may or may not have heard the terms line and load when working with electrical connections, but what do those terms mean. Ohm the standard unit for measuring resistance to flow of. Line sideload side versus bus sideline side nfpa xchange. A load converts electricity into heat, light or motion. Ohm the standard unit for measuring resistance to flow of an electrical current. Glossary all terms and definitions listed alphabetically.
An annual forecast of the states peak electric demand load where there is a 10percent chance that the actual system peak load will exceed the forecasted value in any given year or, stated another way, it is expected that on the average the forecast will be exceeded once every ten years. But if the old thermostat just had 2 wires, it might be a low voltage thermostat. In other words, the tariff is the methods of charging a consumer for consuming electric power. Load rejection the condition in which there is a sudden load loss in the system which causes the generating equipment. The device which takes electrical energy is known as the electric load. On the other hand, load refers to devices on the same circuit that are downstream of the one in question. In the electrical trades, the terms line and load are shorthand words that refer to the wires that deliver power from the source to a device line, vs.
Electric current in which the flow of electric charge periodically reverses direction, whereas in direct current dc, also dc, the flow of electric charge is only in one direction. Understanding electricity requires knowledge of these basic electrical terms. What is the difference between load and line wires. In technical terms, electrical load is synonymous with current. Put another way, the part of a circuit that connects to a welldefined output terminal is. Jul 17, 2017 distinguishing between line and load isnt always necessary. In electric power distribution, a busbar also bus bar is a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution. The load schedule is usually categorised by switchboard or occasionally by subfacility.
An ultrasonic receiver that turns ultrasound signals into electrical signals a line receiver that receives signals from a wire or backplane. Typically, the bigger the operating demand load, the. Heres a diagram to help you understand the situation, and why it happens. This is typical of long rural lines with isolated load areas. Glossary of electrical engineering terms and definitions listed alphabetically.
Load lines, 19661988 international convention on load. Below youll find over xx definitions of electrical terms. Our dilemma now is that workers are refusing to break load with this solid blade and. Nominal system voltage actual system voltage use for calculations single phase. Voltage the electrical pressure needed to force current through any load. Measured line to line or line to neutral with a voltmeter. All electrical work performed by the customer must follow the. Prepared by the task committee on structural loadings of the committee on electrical transmission structures of the structural engineering institute of asce. Once the various parts and applicable standards have been determined, the designer creates a complete a set of plans.
In relation to a given switch or device, line refers to wires or voltage being supplied to it from upstream or from the direction of the main service panel. Considering that output voltage will vary based upon varying line, load, temperature and other conditions, it is strongly advised that droop sharing only be utilized for. Line is the wire going from a current source into a switch. Each load connected in a separate path receives the full circuit voltage, and the. Aug 24, 2018 in technical terms, electrical load is synonymous with current. In other words, the electrical load is a device that consumes electrical energy in the form of the current and transforms it into other forms like heat, light, work, etc. That inductance is used to derive the line resistance. When referring to an electric device that can be connected to another one, such as a receptacle, line refers to the wires feeding it from the panel, which is upstream from the device in terms of the flow of electricity. Electrons, electricity, electronic and other words that begin with electr. Distinguishing between line and load isnt always necessary. Terms that are underlined and italicized are included in the glossary as a separate definition. The hot wires each carry 120 volts and are different phases. The line reactor provides additional circuit inductance. Electrician certification glossary of terms english spanish.
Every electrical plan must be designed to recognized industry standards, use appropriate electrical symbols, and conform to all applicable codes. The transient response is a function of the output capacitor value co, the equivalent. Amplitude a term used to describe the maximum value of a pulse or wave. Tlc recommends that you download and save this pdf document and assignment to. Readers should try to understand this line also with the help of this article. One ampere is the amount of current flow provided when one volt of electrical pressure is applied. Load line analysis for a diode circuit i versus v d a plot of the current, i, versus the voltage drop across the diode, v d, will yield a straight line, called the load line, of. Load line for drawing the dc load line of a transistor, one need to know only its cutoff and saturation points. Load rejection the condition in which there is a sudden load loss in the system which causes the generating equipment to be overfrequency. For the purpose of the present convention, unless expressly provided otherwise.
The maximum continuous load on a circuit breaker is permitted to be 80%. Pictorial glossary the pictorial glossary includes definitions and illustrations for many terms that are frequently used in the electrical industry. The side of the meter that receives incoming power from the utility service lines is called the line side. A line voltage 120v, 240v thermostat would have power in and out, which sounds like what you have. This gives the advantages of ring main systems as line voltage drops are reduced at the various load substations there is a firm supply i. The electrical wiring to the disconnect is fed from the load side, or outgoing side, of the electric meter. Basic insulation a single layer of required insulation to prevent electrical shock.
The electrical load schedule is an estimate of the instantaneous electrical loads operating in a facility, in terms of active, reactive and apparent power measured in kw, kvar and kva respectively. The amount of money frame by the supplier for the supply of electrical energy to various types of consumers in known as an electricity tariff. This means you dont consider linetoline loads when sizing the. Electrician defines electrical terms related to house wiring troubleshooting.
Class of service the characteristics of electric service described in terms of. An electrical load is the part of an electrical circuit in which current is transformed into something useful. Analysis of reactive power in power system electrical. Electric service and meter installations manual dominion energy. Ac drive an electronic device used to control the speed of an ac motor. The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance.
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