TWCleanup The Rating of an electrical appliance indicates the voltage at which the appliance is designed to work and the Electric current current consumption at that voltage. These figures are usually displayed on a rating plate attached to the appliance, e.g. 230 volt s, 3 ampere s. Category Electricity electromagnetism stub ar ... more details
Electrical bonding is the practice of intentionally electrically connecting all exposed metallic non current carrying items in a room or building as protection from electric shock . If a failure of electrical insulation occurs, all bonded metal objects in the room will have substantially the same electrical potential, so that an occupant of the room cannot touch two objects with significantly different potentials. Even if the connection to a distant earth ground is lost, the occupant will be protected from dangerous potential difference s. Explanation In a building with electricity it is normal for safety reasons to connect all metal objects such as piping pipes together to the mains earth to form an equipotential zone . This is done in the United Kingdom UK because many buildings are supplied ..., platforms and floors. A person touching the un earthed metal casing of an electrical device, while ... a fuse electrical fuse or circuit breaker to detect the fault rapidly and interrupt the circuit. In the case of a TT earthing system TT system where the Electrical impedance impedance is high due ... transformer banks by power companies and under large computer installations. Exact rules for electrical ... the bathroom including metal pipes and the earths of electrical circuits must be bonded together ... both to an earthing rod driven into the ground and also to the plumbing . Aircraft electrical bonding In aircraft, electrical bonding prevents static electricity build up that can interfere with radio ... fuel tanks and hoses. ref name aircraft http www.mechanicsupport.com hose electrical bonding.html Mechanic Support, Aircraft hose and electrical bonding ref See also Earthing system Earth potential rise Stray voltage Notes and references Aircraft hose electrical bonding ref http www.mechanicsupport.com hose electrical bonding.html ref reflist Category Electric power distribution Category Electrical safety de Potentialausgleich et Maandamine Potentsiaal htluse s steem sv Potentialutj mning ... more details
For electrical power transmission grids and distribution networks Grid electricity File Ohm s Law with Voltage source.svg right thumb A simple electric circuit made up of a voltage source and a resistor. Here, math V iR math , according to Ohm s Law . Unreferenced date January 2007 An electrical network is an interconnection of electrical element s such as resistor s, inductor s, capacitor s, transmission line s, voltage source s, current source s and switch es. An electrical circuit is a special type of network, one that has a closed loop giving a return path for the current. Electrical networks that consist only of sources voltage or current , linear lumped elements resistors, capacitors, inductors ... sources. Network analysis electrical circuits Analysis of resistive circuits is less complicated ... depending upon the type of source it is. Electrical laws A number of electrical laws apply to all electrical networks. These include Kirchhoff s circuit laws Kirchhoff s current law Kirchhoff s current .... Kirchhoff s circuit laws Kirchhoff s voltage law Kirchhoff s voltage law The directed sum of the electrical .... Design methods Network analysis navigation To design any electrical circuit, either Analogue electronics analog or Digital circuit digital , Electrical engineering electrical engineers need to be able ..., cost and risk of error involved in building circuit prototypes. See also Network analysis electrical ... Circuit diagrams electric circuits Portal Electronics Wiktionary electrical circuit div col colwidth ... Direct current Quiescent current Ground electricity Hydraulic analogy Electrical impedance Impedance ... electrical Network analysis electrical circuits Open circuit voltage RC circuit LC circuit RLC circuit ... Continuity test Voltage drop Mesh analysis div col end DEFAULTSORT Electrical Network Category Electronic circuits Category Electronic engineering Category Electrical engineering am ar ... simple Electrical circuit sk Elektrick obvod sl Elektri ni krog sr ... more details
Electrical Cardiometry is a method based on the model of Electrical Velocimetry , and non invasively measures stroke volume SV , cardiac output CO , and other hemodynamic parameters through the use of 4 surface ECG electrodes. Electrical Cardiometry is a method trademarked by Cardiotronic, Inc., and is U.S. FDA approved for use on adults, children, and neonates. ref U.S. 510K K082242 ref Image Icon MONITOR.jpg thumb 120px A non invasive cardiac output monitor which uses Electrical Cardiometry Cardiotronic ... of Electrical Cardiometry requires the use of 4 ECG electrodes, 2 attached to the left side of the neck and 2 attached at the lower thorax. ref name webpage An electrical alternating current AC of constant ... related to the peak aortic blood acceleration. Electrical Cardiometry is similar to Impedance cardiography in the fact that both methods measure thoracic electrical bioimpedance TEB . The methods differ ... math Z t Z 0 Delta Z R Delta Z C math where Z sub 0 sub is the quasi static portion of the electrical ... dZ t dt math waveform. Citation needed date February 2009 Electrical Velocimetry Electrical Velocimetry EV is the model which Electrical Cardiometry is based. EV is based on the fact that the conductivity ... for estimating stroke volume by means of thoracic electrical bioimpedance calculates the product ... C P cdot bar v FT cdot FT math The model of Electrical Velocimetry derives the mean blood velocity ... Impedance cardiography and Electrical Cardiometry derive SV and CO from measurements of TEB, but the underlying ... in children or neonates. Citation needed date February 2009 Parameters The electrical and impedance ... of blood flow in the aorta VIC Variation of ICON Thoracic Fluid Index The electrical conductivity ... must perform to pump blood each minute Systolic Time Ratio The ratio of the electrical and mechanical systole Pre Ejection Period The time interval from the beginning of electrical stimulation of the ventricles to the opening of the aortic valve electrical systole Left Ventricular Ejection Time ... more details
Image electrostatic discharge.jpg thumbnail right 180px Electrical breakdown in an electric discharge showing the ribbon like Plasma physics plasma filaments from a Tesla coil . The term electrical breakdown ... can apply to the failure of an electrical network electric circuit . Alternatively, it may refer to a rapid reduction in the resistance of an electrical insulator that can lead to a Electric spark ... the current in a high power circuit. Electrical system failure The most common meaning is related ..., alternator failure, broken wires, blown fuse electrical fuse s, etc. Failure of electrical insulation The second meaning of the term is more specifically a reference to the breakdown of the Electrical insulation insulation of an electrical wire or other electrical component. Such breakdown usually ... causes the opening of a protective circuit breaker . Electrical breakdown is often associated with the failure ... in the electricity distribution grid. Electrical breakdown can also occur across the insulators ... arcing to nearby branches of trees. Under sufficient electrical stress, electrical breakdown can ... overstress a dielectric beyond its dielectric strength so as to intentionally cause electrical ... from an insulating state to a highly Electrical conduction conductive state. This transition is characterized ... protection for telecommunication and Power systems electrical power systems, and ignite fuel via spark plugs in many Internal combustion engine internal combustion engines . Mechanism Electrical breakdown ... is exceeded. Regions of high electrical stress can cause nearby gas to partially ionize and begin ... also Electrostatic discharge Electrostatic Discharge or in an electrostatic precipitator . Partial electrical .... If the voltage is sufficiently high, complete electrical breakdown of the air will culminate in an electrical ... filaments from a Tesla coil . Click image for detail If a fuse electrical fuse or circuit breaker fails ... be useful in everyday applications such as spark plugs for gasoline engines, electrical welding of metals ... more details
Lymph MeshName MeshNumber Code TerminologiaHistologica 2 00 1.1.02024 An electrical synapse is a mechanical ... G, Monyer H, Bruzzone R title Electrical synapses a dynamic signaling system that shapes the activity ... pii S0005273604000410 ref In organisms, electrical synapse based systems co exist with chemical synapses. Compared to chemical synapse s, electrical synapses conduct nerve impulse s faster, but unlike ... than that of the originating neuron . Electrical synapses are often found in neural systems that require the fastest possible response, such as defensive reflexes. An important characteristic of electrical ... BW title Functional properties of electrical synapses between inhibitory interneurons of neocortical ... doi 10.1016 S0896 6273 04 00043 1 author Bennett MV, Zukin RS title Electrical coupling and neuronal ... be identical or slightly different from one another. ref name Bennet04 Effects The simplicity of electrical ... to recognize chemical messengers, signal transmission at electrical synapses is more rapid than ... delay for a chemical synapse is typically about 2 ms, while the synaptic delay for an electrical synapse may be about 0.2 ms. However, the difference in speed between chemical and electrical ... of attenuation of the signal is due to the membrane Electrical resistance and conductance resistance of the presynaptic and postsynaptic neurons. Long term changes can be seen in electrical synapses. For example, changes in electrical synapses in the retina are seen during light and dark adaptations ... speed of electrical synapses also allows for many neurons to fire synchronously. ref name Kandel00 ... of the speed of transmission, electrical synapses are found in escape mechanisms and other processes ... at some of these synapses that is, that the electrical connection they establish can strengthen or weaken as a result of activity ref Activity Dependent Long Term Depression of Electrical Synapses, Julie S. Haas, et al., Science 334, 389 2011 doi 10.1126 science.1207502 ref . Electrical synapses are abundant ... more details
refimprove date December 2011 In telecommunications , electrical length is the length of a transmission medium or antenna electronics antenna element expressed as the number of wavelength s of the Signalling telecommunication signal propagating in the medium. Electromagnetic waves propagate more slowly in a medium than in free space, so a wave in a medium will have a larger number of waves than a wave of the same frequency propagating over the same distance in free space. Alternatively put, the distance ..., hence the transmission medium is said to have an electrical length greater than its physical length. The electrical length is most commonly expressed in units of the wavelength, , which is related ... In conducting cables, distributed electrical resistance resistances , capacitance s and inductance ... space, and the electrical length approximately 1.5 times the physical length. Antennas Many antenna ... at resonance is that it presents an impedance electrical impedance to the feedline to the transmitter or receiver which is a pure Electrical resistance resistance , while off resonance it presents .... The condition for resonance in a linear dipole antenna is usually that the electrical ... of a quarter wavelength, 4. The electrical length of an antenna element is, in general, different ... of nearby metal objects, will decrease the velocity of the waves in the element, increasing the electrical ... the coil. Electrical lengthening is the modification of an Antenna radio aerial which is shorter than ... either as transmitting or receiving antennas Advantages The electrical lengthening allows the construction ... widely used example is the rubber ducky antenna . Disadvantages The electrical lengthening reduces ... are not undertaken. An electrically extended aerial is less Electrical efficiency efficient than a non ... beacon NDB s electrical lengthening is extensively applied, because these use antennas which are considerably ... Dec 7, 1937 DEFAULTSORT Electrical Length Category Telecommunications Category Antennas de Elektrische ... more details
A bushing is a hollow insulating liner through which a conductor may pass. Bushings appear on switchgear , transformer s, circuit breaker s and other high voltage equipment. Description Image DIN 52NF1000.jpg thumb right A disassembled bushing. The copper conductor passes up the hollow centre of the bushing. The bushing is a hollow insulator electrical insulator , allowing a conductor to pass along its centre and connect at both ends to other equipment. Bushings are often made of wet process fired porcelain , and may be coated with a semi conducting glaze to assist in equalizing the electrical stress along the length of the bushing. The inside of the bushing may contain paper insulation and the bushing is often filled with oil to provide additional insulation. Bushings for medium voltage and low voltage low voltage apparatus may be made of resins reinforced with paper. The use of polymer bushings for high voltage applications is becoming more common. The largest high voltage bushings made are usually associated with HVDC high voltage direct current converters. Capacitor types Some of the higher voltage types layers of conductive paper, film, ink or aluminum foil are used with an insulating medium are called capacitor bushings because they form a low value capacitor between the conductor and the wall. This is done to reduce the electrical field stress that would otherwise occur and cause Electrical breakdown breakdown . Bushing failure Bushings sometimes fail due to partial discharge degradation in the insulation. There is at present great interest in the electricity supply industry in monitoring the condition of high voltage bushings. References cite book author Central Electricity Generating Board title Modern Power Station Practice publisher Pergamon year 1982 isbn 0 08 016436 6 Category Electric power systems components fr Travers e isol e nl Doorvoering tr Ge it izolat r ... more details
Infobox film name Electrical Skeletal image alt see WP ALT caption director Brian Lonano producer Plainlist Erin L. Horsey Brian Lonano writer Kevin Lonano starring Plainlist Vincent K. Guagenti Don Singalewitch music Casket Architects cinematography Gary Powell editing Brian Lonano studio distributor released Film date Year Month Day Location runtime country Film US language English budget gross Electrical Skeletal is a 2007 comedy film comedy Horror film horror musical film musical short film directed by Brian Lonano . The film stars Don Singalewitch, Vincent K. Guagenti and the music of the Casket Architects . Plot After a foreboding introduction by a wily old gravedigger, a slightly overweight, drunken punker named Gristle stumbles into a spooky cemetery and proceeds to defile all the graves. His fun is interrupted by a UFO that shoots a beam into the ground and awakens an alien skeleton monster. Cast Don Singalewitch ... The Grave Digger Vincent K. Guagenti ... Gristle Critical reception Electrical Skeletal won the Best Comedic Horror award at the 2008 Chicago Horror Film Festival . ref cite web url http www.chicagohorrorfest.com ?q node 13 title CHFF Success Stories author gatlin date 2008 01 15 work Chicago Horror Film Festival ref References reflist External links imdb title id 1000707 title Electrical Skeletal Category 2007 films Category 2000s comedy films Category American comedy horror films Category American comedy science fiction films Category American musical comedy films Category Black and white films Category English language films Category 2000s short films 2000s comedy film stub ... more details
. Connectorized terminators are available with or without safety chains. See also Electrical connector Electrical network MIL STD 1553 Issues Signal reflection Impedance matching Biasing electronics ... Corporation Other meaning Electrical termination sometimes refers to manufacturing operations which connect wires together. This includes crimping , soldering , and related operations. See electrical ... more details
Featured article Image Power plant.jpg thumb Electrical engineers design complex power systems... Image Silego clock generator.JPG thumb ...and electronic circuits. Electrical engineering is a field of engineering ... commercialization of the electric telegraph and electrical power supply. It now covers a range of subtopics ... s. Electrical engineering may include electronic engineering . Where a distinction is made, usually outside of the United States, electrical engineering is considered to deal with the problems associated with large scale electrical systems such as Electric power transmission power ... What is the difference between electrical and electronic engineering? work FAQs Studying Electrical ... 2012 ref Alternatively, electrical engineers are usually concerned with using electricity to transmit electrical energy energy , while electronic engineers are concerned with using electricity to process ... . History Main History of electrical engineering Image Faraday Cochran Pickersgill.jpg thumb upright ... has been a subject of scientific interest since at least the early 17th century. The first electrical ... current and potential difference in a Electrical conductor conductor , Michael Faraday , the discoverer ... to practical use in electrical telegraph telegraphy . By the end of the 19th century the world ... Electrical Congress held in the city of Chicago, August 21st to 25th, 1893. Publisher New York, American Institute of Electrical Engineers, 1894. May be downloaded from http www.archive.org details ... recognised in relevant legislation. ref Tunbridge, Paul. Lord Kelvin His Influence on Electrical ... scale electrical supply network. During these years, the study of electricity was largely considered ... started to offer academic degree degrees in electrical engineering. The Darmstadt University of Technology founded the first chair and the first faculty of electrical engineering worldwide in 1882. In the same ... the first option of Electrical Engineering within a physics department. ref cite book author Weber ... more details
Electrical phenomena are commonplace and unusual events that can be observed which illuminate the principles of the physics of electricity and are explained by them. Electrical phenomena are a somewhat arbitrary division of electromagnetic phenomenon electromagnetic phenomena . Some examples are Biefeld Brown effect &mdash The effect is more widely referred to as electrohydrodynamics EHD or sometimes electro fluid dynamics, a counterpart to the well known magneto hydrodynamics. Contact electrification &mdash The phenomenon of electrification by contact. When two objects were touched together, sometimes the objects became spontaneously charged ne negative charge, one positive charge . Direct Current &mdash old Galvanic Current or continuous current The continuous flow of electricity through a conductor such as a wire from high to low potential. Electroluminescence &mdash The phenomenon where a material emits light in response to an electric current passed through it, or to a strong electric field. Electrical conduction &mdash The movement of electrically charged particles through transmission medium. Electric shock &mdash Physiological reaction of a biological organism to the passage of electric current through its body. Ferroelectric effect &mdash The phenomenon whereby certain ionic crystals may exhibit a spontaneous dipole moment. Inductance &mdash The phenomenon whereby the property of a circuit by which energy is stored in the form of an electromagnetic field. Lightning &mdash powerful natural electrostatic discharge produced during a thunderstorm. Lightning s abrupt electric discharge is accompanied by the emission of light. Photoconductivity &mdash The phenomenon in which .... Electric spark Spark s &mdash Electrical breakdown of a medium which produces an ongoing plasma ... &mdash the Seebeck effect , the Peltier effect , and the Thomson effect Thunderstorm &mdash also electrical ... s Guide to Natural VLF Radio Phenomena Category Electrical phenomena mk nn Elektriske ... more details
Unreferenced date December 2009 If an electrical network electric circuit has a well defined output terminal, the circuit connected to this terminal or its input impedance is the load . The term load may also refer to the Electric power power consumed by a circuit that topic is not discussed here. Load affects the performance of circuits that output volt ages or Current electricity current s, such as sensor s, voltage source s, and amplifier s. Mains electricity Mains Domestic AC power plugs and sockets power outlet s provide an easy example they supply power at constant voltage, with electrical appliance s connected to the power circuit collectively making up the load. When a high power appliance switches on, it dramatically reduces the load Electrical impedance impedance . If the load impedance is not very much higher than the power supply impedance, the voltage will drop. In a domestic environment, switching on a heating appliance may cause incandescent light s to dim noticeably. A more technical approach Two sidenotes on generality, for advanced readers This discussion assumes circuits are Linear circuit linear . It uses simple electrical resistance resistances , but can be readily generalized to impedance s for Alternating current AC analysis . When discussing the effect of load on a circuit, it is helpful to disregard the circuit s actual design and consider only the Th venin equivalent . The Norton s theorem Norton equivalent could be used instead, with the same results. The Th venin equivalent of a circuit looks like this image Electric load0.png center thumb 322px The circuit is represented by an ideal voltage source Vs in series with an internal resistance Rs . With no load open circuited terminals , all of math V S math falls across the output the output voltage is math V S math . However, the circuit will behave differently if a load is added. We would like ... will fall. See also Dummy load DEFAULTSORT Electrical Load Category Electrical circuits ar ... more details
a variety of electrical connectors An electrical connector is an electro mechanical device for joining electrical circuit s as an interface computing interface using a mechanical assembly. The connection ... as a permanent electrical joint between two wires or devices. ref name RSM98 Robert S. Mroczkowski, Electrical ... 1 ref There are hundreds of types of electrical connectors. Connectors may join two lengths of flexible copper wire or cable, or connect a wire or cable or optical interface to an electrical Terminal electronics terminal . In computing, an electrical connector can also be known as a physical interface ... disconnects performing the latter. Properties of electrical connectors Electrical connectors are characterised ... that include physical shock and vibration, water spray, dust, etc. to ensure the integrity of the electrical connection and housing seals. Types of electrical connectors A terminal is a simple type of electrical connector that connects two or more wires to a single connection point. Wire nut s are another ... a convenient means of connecting individual electrical wires without a splice or physically joining ... of electrical connector available. Some disadvantages are that connecting wires is more difficult ... only by removing stripping a short length of Electrical insulation insulation from the end ... assembly. If properly assembled, the resulting Electrical termination terminations are gas tight ... be sufficiently tight to make a good electrical connection and complete the circuit. When working with multi ... often with the female electrical contact or socket, and is the more fixed connector of a connector pair. Plug commonly refers to a movable connector, often but not always with the male electrical ... for Electrical and Electronics Parts and Equipment ASME Y14.44 2008 Section 2.1.5.3 2 publisher ASME ... ref where J means jack. ref cite book title Graphic Symbols for Electrical and Electronics Diagrams ..., the plug, is designed to attach to a wire, cable or removable electrical assembly The movable less ... more details
A resolver is a type of rotary electrical transformer used for measuring degrees of rotation. It is considered an analog device , and has a digital counterpart, the rotary encoder rotary or pulse encoder . Description The most common type of resolver is the brushless transmitter resolver other types are described at the end . On the outside, this type of resolver may look like a small electrical motor having a stator and rotor. On the inside, the configuration of the wire windings makes it different. The stator portion of the resolver houses three windings an exciter winding and two two phase windings usually labeled x and y case of a brushless resolver . The exciter winding is located on the top, it is in fact a coil of a turning rotary transformer. This transformer empowers the rotor, thus there is no need for brushes, or no limit to the rotation of the rotor. The two other windings are on the bottom, wound on a lamination. They are configured at 90 degrees from each other. The rotor houses a coil, which is the secondary winding of the turning transformer, and a separate primary winding in a lamination, exciting the two two phase windings on the stator. The primary winding of the transformer, fixed to the stator, is excited by a sinusoidal electric current, which by electromagnetic ... electrical angle mechanical angle p. where p is the no. of pole pairs. Some types of resolvers include ... multipole electrical motors. This device can be used in any application in which the exact rotation ..., the ratio between the sine and the cosine representing the electrical angle. The system turns ... equals the electrical angle applied to the stator. Differential resolvers These types combine ... secondary windings in the other. The relation of the electrical angle delivered by the two secondary windings and the other angles is secondary electrical angle, mechanical angle, and primary electrical ... Resolver Conversion Handbook Category Sensors Category Transformers electrical de Resolver et Resolver ... more details
other uses Reactance disambiguation In electrical and electronic systems, reactance is the opposition of a circuit element to a change of electric current or voltage , due to that element s inductance or capacitance . A built up electric field resists the change of voltage on the element, while a magnetic field resists the change of current. The notion of reactance is similar to electrical resistance , but they differ in several respects. Capacitance and inductance are inherent properties of an element, just like resistance. Reactive effects are not exhibited under constant direct current , but only when the conditions in the circuit change. Thus, the reactance differs with the rate of change, and is a constant only for circuits under alternating current of constant frequency. In vector analysis of electric circuits, resistance is the real part of complex electric impedance impedance , while reactance is the imaginary part. Both share the same International System of Units SI unit , the ohm . An ideal resistor has zero reactance, while ideal inductor s and capacitor s consist entirely ... math scriptstyle X math . Both reactance math scriptstyle X math and Electrical resistance resistance math scriptstyle R math are required to calculate the Electrical impedance impedance math ... is the Electrical impedance impedance , measured in ohms. math R math is the Electrical resistance ... to be Inductance inductive If math scriptstyle X 0 math , then the impedance is purely Electrical resistance ..., Inc. ref math X C frac 1 omega C frac 1 2 pi f C quad math A capacitor consists of two Electrical conduction conductor s separated by an Electrical insulation insulator , also known as a dielectric .... A Direct current DC voltage applied across a capacitor causes positive Electrical charge charge to accumulate on one side and negative Electrical charge charge to accumulate on the other side the electric ... energy to the circuit, thus a pure reactance does not dissipate power. See also Electrical measurements ... more details
commons Category Electrical conduit Electrical conduit Image Conduit firestop us.jpg thumb right Electrical ... thumb right Electrical conduit and Bus bar bus duct in a building at Texaco Nanticoke refinery in Nanticoke, Ontario , 1980s. An electrical conduit is an electrical piping system used for protection and routing of electrical wiring . Electrical conduit may be made of metal , plastic , fiber , or fired ... s at the site of installation of electrical equipment. Its use, form, and installation details are often specified by wiring regulations, such as the US National Electrical Code NEC or other ... electrical conductors, but the term has a more restrictive definition when used in wiring ... 20th century purpose built couplings and fittings were manufactured for electrical use. Comparison with other wiring methods Electrical conduit provides very good protection to enclosed conductors from .... Frequent wiring changes are made simpler and safer through the use of electrical conduit ... encasement in concrete. This is commonly used in commercial buildings to allow electrical and communication ... labor and material cost . Wiring regulations for electrical equipment in hazardous areas may require .... ref R.K. Clidero Applications of Electrical Construction , General Publishing Co., Don Mills ... than EMT but lighter than RMC. It may be threaded. Electrical metallic tubing EMT , sometimes called ... will have about one third the weight of an equally sized rigid steel conduit. ref R. S. Means Electrical ... electrical practice, it is available in three different wall thicknesses, with the thin wall ... Plastic tubing.jpg thumb right Plastic tubing for use as electrical conduit. Rigid Nonmetallic Conduit RNMC is a non metallic unthreaded tubing. Electrical Nonmetallic Tubing ENT is a thin walled corrugated ... would be needed to use rigid connections. Electrical codes may restrict the length of a run of some ... FMC which is described in National Electrical Code NEC Article 348. FMT is a raceway, but not a conduit ... more details
Electrical resonance occurs in an electrical network electric circuit at a particular Resonance resonance frequency where the imaginary parts of circuit element Electrical impedance impedances or admittance s cancel each other. In some circuits this happens when the impedance between the input and output of the circuit is almost zero and the transfer function is close to one. Resonant circuits exhibit ringing and can generate higher voltages and currents than are fed into them. They are widely used in wireless radio transmission for both transmission and reception. LC circuits main LC circuit Resonance of a circuit involving capacitors and inductors occurs because the collapsing magnetic field of the inductor generates an electric current in its windings that charges the capacitor, and then the discharging capacitor provides an electric current that builds the magnetic field in the inductor. This process is repeated continually. An analogy is a mechanical pendulum . At resonance, the series Electrical impedance impedance of the two elements is at a minimum and the parallel impedance is at maximum. Resonance is used for tuned filter tuning and filtering, because it occurs at a particular frequency for given values of inductance and capacitance . It can be detrimental to the operation of telecommunications communications circuits by causing unwanted sustained and transient oscillations that may cause noise , signal distortion , and damage to circuit elements. Parallel resonance or near to resonance circuits can be used to prevent the waste of electrical energy, which would otherwise occur while the inductor built its field or the capacitor charged and discharged. As an example, asynchronous motors waste inductive current while synchronous ones waste capacitive current. The use ... An RLC circuit or LCR circuit is an electrical circuit consisting of a resistor , an inductor ... letters being the usual electrical symbols for electrical resistance resistance , inductance and capacitance ... more details
File Grain oriented electrical steel grains .jpg thumb Surface of grain oriented electrical steel with removed coating, with visible grains of crystallites Electrical steel , also called lamination steel , silicon electrical steel , silicon steel , relay steel or transformer steel , is specialty steel tailored to produce certain magnetic properties, such as a small hysteresis area small energy dissipation per cycle, or low core loss and high permeability electromagnetism permeability . The material is usually manufactured in the form of cold rolling cold rolled strips less than 2 mm thick. These strips are called lamination s when stacked together to form a core. Once assembled, they form ... be cut by a laser, or by wire erosion . Metallurgy Electrical steel is an iron alloy which may have ... up to 0.5 . Silicon significantly increases the electrical resistivity of the steel, which decreases ... Resistivity 47.2 10 sup 8 sup m example for 3 silicon content Grain orientation Electrical steel ... electrical steel usually has a silicon level of 3 Si 11Fe . It is processed in such a way that the optimum ... of the directional properties of grain oriented electrical steel. Amorphous steel Amorphous metal ... BAT, March 1983 ref Lamination coatings Electrical steel is usually coated to increase electrical .... ref Beatty, Standard Handbook for Electrical Engineers 11th ed. , pg. 4 111 ref The type of coating ... The magnetic properties of electrical steel are dependent on heat treatment , as increasing ... test and for common grades of electrical steel may range from about 2 to 10 watts per kilogram 1 to 5 watts per pound at 60 Hz and 1.5 tesla magnetic field strength. Semi processed electrical steels ... 150 micrometer grain size. The fully processed steels are usually delivered with electrical ... of electrical steels are tested using the internationally standardised Epstein frame method. ref ... Use dmy dates date December 2011 DEFAULTSORT Electrical Steel Category Steels Category Electromagnetic ... more details
for modern solid state electronic devices powered by the protected circuit. Electrical noise bypass ... sensitive device such as a Fuse electrical fuse or circuit breaker . This device is called ... electrical conductors . Use in current measuring This section is linked from Ammeter Image Shuntresistor50A.jpg right thumb 200px 50 A shunt resistor An ammeter shunt allows the measurement of electrical ... the shunt , a manganin resistor of accurately known electrical resistance resistance , is placed ... the current value. In order not to disrupt the electrical circuit circuit , the resistance of the shunt ... shunts or multipliers in an electric meter Category electrical engineering da Shunt de Shunt Elektrotechnik ... more details
Electrical elements are conceptual abstractions representing idealized electrical component s, such as resistor s, capacitor s, and inductor s, used in the circuit analysis analysis of electrical networks . Any electrical network can be analysed as multiple, interconnected electrical elements in a Schematic diagram Electronic industry schematic diagram or circuit diagram , each of which affects the voltage in the network or Current electricity current through the network. These ideal electrical elements represent real, physical Electronic component electrical or electronic components but they do not exist physically and they are assumed to have ideal properties according to a lumped element model , while components are objects with less than ideal properties, a degree of uncertainty in their values and some degree of nonlinearity, each of which may require a combination of multiple electrical elements in order to approximate its function. Circuit analysis using electric elements is useful for understanding many practical electrical networks using components. By analyzing the way a network is affected by its individual elements it is possible to estimate how a real network will behave. One port elements Only nine types of element memristor not included , five passive and four active, are required to model any electrical component or circuit. Citation needed date March 2012 Each element is defined by a relation between the state variable s of the network Current electricity current ... is attached to it. Three Passivity engineering passive elements Electrical resistance Resistance ... elements are given by ref name Trajkovic Ljiljana Trajkovi , Nonlinear circuits , The Electrical ... for electrical networks reciprocal . Networks built from the basic linear elements only are obliged ... of representation of components by way of electrical elements. On a first degree of approximation ... line DEFAULTSORT Electrical Element Category Electronics terms Category Electrical systems ar ... more details
Electrical tuning is a mechanism by which vertebrate s such as frog s and reptile s, which lack a long cochlea , discriminate sound . Mammal s have long cochleae, and are able to distinguish different sounds by mechanisms such as mechanical tuning , in which the stiffness and length of hair cell s stereocilia makes a given cell best suited to respond to a certain type of stimulus. The basilar membrane of animals with long cochleae also vibrates at different locations along the membrane in response to different frequency sounds. Since the reptilian ear lacks a long cochlea, electrical tuning provides an alternative mechanism for perceiving differences in sound. With a combination of voltage gated calcium channel s and calcium sensitive potassium channel K channel s, the cell biology cell s set up an oscillation in voltage and oscillate in response to a depolarization depolarizing stimulus physiology stimulus . Calcium in biology Ca sup sup enters the cell and depolarizes it, opening potassium K sup sup channels which allow K sup sup to leave and hyperpolarize the cell. Since the exit of K sup sup from the cell is delayed, the voltage increases, but then with the exit of the K sup sup the cell overshoots the membrane potential and hyperpolarizes. Different cells have different delays for K sup sup leaving and thus the voltage oscillates at different frequencies. The delays can be as short as 0.7 millisecond ms or as long as 150 ms, whereas the Ca sup sup entry always occurs within about 1 ms Fettiplace, 1987 . Thus by varying the length of delay for K sup sup to leave, cells ion concentration s can oscillate at specific frequency frequencies . Cells with higher oscillating frequencies respond best to higher frequency sounds, while those with lower frequencies respond best ... on the same neuron or group of neurons. Auditory system References Fettiplace R. 1987. Electrical ... 425. Fuchs PA, Nagai T, and Evans MG. 1988 http www.neuroscience.org cgi reprint 8 7 2460 Electrical ... more details
A camlock , named after the Cam lok made by Crouse Hinds or cam for short is often used in temporary electrical power production Electricity distribution distribution . It is common in uses where more than 50 Ampere A is required or Three phase 3 phase connections are in use. Camlocks are used to connect large Electrical generator generators or building disconnects to either a distribution panel or lighting dimmer rack. They are usually found only in professional environments. The color s correspond to the different functions of the line, and are not arbitrary. Extra caution should be used to verify correct phase in relation to color coordination with foreign companies and equipment in traveling productions. The correct American standard is as follows class wikitable 208 240 Volt Green Ground White Neutral Black 1 Red 2 Blue 3 class wikitable 480 Volt Green Ground Orange 1 Yellow 2 Brown 3 The UK system uses the following colour codes as the use of Camlocks have been declining, it is very unlikely to find any matching the new colour codes class wikitable UK Camlock Colour Codes Colour Old Colour New Use Green Green Earth Black Blue Neutral Red Brown L1 Yellow Black L2 Blue Grey L3 Extra care should be taken when connecting together systems using old and new colour codes, especially as Black was originally used as a neutral colour and is now a phase colour, and blue which used to denote a phase is used as a neutral. See also Powerlock Category Electric power distribution electronics stub ... more details
Image Melbourne Terminal Station.JPG 300px thumb A 50 Hz electrical substation in Melbourne . This is showing three of the five 220 kV 66 kV transformers, each with a capacity of 185 MVA Image Electrical Substation.JPG 300px thumb A 115 kV to 41.6 12.47 kV 5 MVA 60 Hz substation with circuit switcher, regulators, reclosers and control building at Warren, Minnesota A substation is a part of an electrical Electricity generation generation , electric power transmission transmission , and electric power distribution distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Electric power may flow through several substations between generating plant and consumer, and its voltage ... electrical utility, or may be owned by a large industrial or commercial customer. Generally substations ... the days before the distribution system became a electrical power transmission grid . As central ... Russia.jpg thumb SF sub 6 sub 110 kV instrument current transformer TGFM series, Russia Image Electrical ... circuit breakers or Fuse electrical fuses for protection of distribution circuits. Substations themselves ... substations can range from simple to complex. A small switching station may be little more than a electrical ... with necessary clearances for electrical safety, and for access to maintain large apparatus such as transformers ... and outgoing feeders or transmission lines. It is a usual practice by many electrical utilities to prepare ... components, the lines of a given voltage connect to one or more Electrical bus bus es. These are sets of bus bar s, usually in multiples of three, since three phase electrical power distribution is largely ... Early electrical substations required manual switching or adjustment of equipment, and manual collection ... also Insulator electrical Power station Electricity pylon Transformer Static VAR compensator Vehicle ... substation References and further reading reflist Commons Electrical substation http www.eng.uwi.tt ... more details
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