Electrical breakdown in an electric discharge showing the ribbon-like plasma filaments from a Tesla coil. Electrostatic discharge ( ESD) is the sudden and momentary Electric current that flows between two objects at different Electrical potentials The term is In Physics and Chemistry, plasma is an Ionized Gas, in which a certain proportion of Electrons are free rather than being bound A Tesla coil is a type of resonant transformer circuit invented by Serbian-American scientist Nikola Tesla around 1891

The term electrical breakdown has several similar but distinctly different meanings. The term can apply to the failure of an electric circuit. An electrical network is an interconnection of Electrical elements such as Resistors Inductors Capacitors Transmission lines Voltage Alternately, it may refer to a rapid reduction in the resistance of an electrical insulator that can lead to a spark jumping around or through the insulator. This may be a momentary event (as in an electrostatic discharge), or may lead to a continuous arc discharge if protective devices fail to interrupt the current in a high power circuit. Electrostatic discharge ( ESD) is the sudden and momentary Electric current that flows between two objects at different Electrical potentials The term is An electric arc is an Electrical breakdown of a gas which produces an ongoing plasma discharge, resulting from a current flowing through normally nonconductive

Electrical system failure

The most common meaning is related to automobiles and is the failure of an electric circuit or associated device resulting in a loss of vehicle function (a breakdown). Common problems include battery discharge, alternator failure, broken wires, blown fuses, and a failed fuel pump. In electronics a battery is a combination of two or more Electrochemical cells which store chemical Energy which can be converted into electrical energy alternator is an electromechanical device that converts mechanical energy to Alternating current electrical energy In Electronics and Electrical engineering a fuse (short for fusible link) is a type of Overcurrent protection device "Fuel pump" should not be confused with Fuel dispenser, a device that dispenses fuel into an automobile

Failure of electrical insulation

The second meaning of the term is more specifically a reference to the breakdown of the insulation of an electrical wire or other electrical component. An insulator, also called a Dielectric, is a material that resists the flow of Electric current. A wire is a single usually cylindrical, elongated string of drawn Metal. Such breakdown usually results in a short circuit or a blown fuse. Short Circuit is a 1986 comedy Science fiction film starring Ally Sheedy and Steve Guttenberg and directed by This occurs at the breakdown voltage. Breakdown Voltage of an Insulator is the minimum voltage that causes a portion of an insulator to become electrically conductive. Actual insulation breakdown is more generally found in high-voltage applications, where it sometimes causes the opening of a protective circuit breaker. The term high voltage characterizes electrical circuits in which the voltage used is the cause of particular safety concerns and insulation requirements A circuit breaker is an automatically-operated electrical Switch designed to protect an electrical circuit from damage caused by overload or Electrical breakdown is often associated with the failure of solid or liquid insulating materials used inside high voltage transformers or capacitors in the electricity distribution grid. A transformer is a device that transfers Electrical energy from one circuit to another through inductively coupled Electrical conductors A capacitor is a passive electrical component that can store Energy in the Electric field between a pair of conductors Electricity distribution is the penultimate stage in the delivery (before retail) of Electricity to end users Electrical breakdown can also occur across the strings of insulators that suspend overhead power lines, within underground power cables, or lines arcing to nearby branches of trees. Electric power transmission, a process in the delivery of Electricity to consumers is the bulk transfer of electrical power Under sufficient electrical stress, electrical breakdown can occur within solids, liquids, or gases. However, the specific breakdown mechanisms are significantly different for each phase of dielectric. A dielectric is a nonconducting substance ie an insulator. The term was coined by William Whewell in response to a request from Michael Faraday. All this leads to catastrophic failure of the instruments.

Disruptive devices

A disruptive device is a device that has a dielectric, whereupon being stressed beyond its dielectric strength, has an electrical breakdown. A dielectric is a nonconducting substance ie an insulator. The term was coined by William Whewell in response to a request from Michael Faraday. In Physics, the term dielectric strength has the following meanings Of an insulating material the maximum electric Field strength that it can withstand This results in the sudden transition of part of the dielectric material from an insulating state to a highly conductive state. Electrical conduction is the movement of electrically charged particles through a Transmission medium ( Electrical conductor) This transition is characterized by the formation of an electric spark, and possibly an electric arc through the material. Electrostatic discharge ( ESD) is the sudden and momentary Electric current that flows between two objects at different Electrical potentials The term is An electric arc is an Electrical breakdown of a gas which produces an ongoing plasma discharge, resulting from a current flowing through normally nonconductive If this occurs within a solid dielectric, physical and chemical changes along the path of the discharge will cause permanent degradation and significant reduction in the material's dielectric strength.

Mechanism

Electrical breakdown occurs within a gas (or mixture of gases, such as air) when the dielectric strength of the gas(es) is exceeded. In Physics, the term dielectric strength has the following meanings Of an insulating material the maximum electric Field strength that it can withstand Regions of high electrical stress can cause nearby gas to partially ionize and begin conducting. This is done deliberately in low pressure discharges such as in fluorescent lights (see also Electrostatic Discharge) or in an electrostatic precipitator. A fluorescent lamp or fluorescent tube is a Gas-discharge lamp that uses Electricity to excite mercury Vapor. Electrostatic discharge ( ESD) is the sudden and momentary Electric current that flows between two objects at different Electrical potentials The term is An electrostatic precipitator (ESP or electrostatic air cleaner is a Particulate collection device that removes particles from a flowing gas (such as air using

Partial electrical breakdown of the air causes the "fresh air" smell of ozone during thunderstorms or around high-voltage equipment. OZONE is an object oriented Operating system written in the C programming language. Although air is normally an excellent insulator, when stressed by a sufficiently high voltage (an electric field strength of about 3 x 10⁶V/m^[1]), air can begin to break down, becoming partially conductive. In Physics, the space surrounding an Electric charge or in the presence of a time-varying Magnetic field has a property called an electric field (that can The volt (symbol V) is the SI derived unit of electric Potential difference or Electromotive force. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International If the voltage is sufficiently high, complete electrical breakdown of the air will culminate in an electrical spark or arc that bridges the entire gap. An electric arc is an Electrical breakdown of a gas which produces an ongoing plasma discharge, resulting from a current flowing through normally nonconductive While the small sparks generated by static electricity may barely be audible, larger sparks are often accompanied by a loud snap or bang. For the science of static charges see Electrostatics Static electricity refers to the accumulation of excess Electric charge in a Lightning is an example of an immense spark that can be many miles long. Lightning is an atmospheric discharge of Electricity, which typically occurs during Thunderstorms and sometimes during volcanic eruptions or The color of the spark depends upon the gases that make up the gaseous media.

Electric discharge showing the lightning-like plasma filaments from a Tesla coil. Electrostatic discharge ( ESD) is the sudden and momentary Electric current that flows between two objects at different Electrical potentials The term is Lightning is an atmospheric discharge of Electricity, which typically occurs during Thunderstorms and sometimes during volcanic eruptions or In Physics and Chemistry, plasma is an Ionized Gas, in which a certain proportion of Electrons are free rather than being bound A Tesla coil is a type of resonant transformer circuit invented by Serbian-American scientist Nikola Tesla around 1891 (Click image for detail)

If a fuse or circuit breaker fails to interrupt the current flowing through a spark in a power circuit, current may continue to flow, forming a very hot electric arc. In Electronics and Electrical engineering a fuse (short for fusible link) is a type of Overcurrent protection device A circuit breaker is an automatically-operated electrical Switch designed to protect an electrical circuit from damage caused by overload or An electric arc is an Electrical breakdown of a gas which produces an ongoing plasma discharge, resulting from a current flowing through normally nonconductive The color of an arc depends primarily upon the conductor materials (as they are vaporized and mix within the hot plasma in the arc). In Physics and Chemistry, plasma is an Ionized Gas, in which a certain proportion of Electrons are free rather than being bound Although sparks and arcs are usually undesirable, they can be useful in everyday applications such as spark plugs for gasoline engines, electrical welding of metals, or for metal melting in an electric arc furnace. A spark plug (also very rarely nowadays in British English: a sparking plug) is an electrical device that fits into the Cylinder Welding is a fabrication process that joins materials usually Metals or Thermoplastics by causing coalescence. An electric arc furnace (EAF is a Furnace that heats charged material by means of an Electric arc.

Voltage-Current Relation

Voltage-current relation before breakdown

Before breakdown, there is a non-linear relation between voltage and current as shown in figure. In region 1, there are free ions that can be accelerated by the field and induce a current. These will be saturated after a certain voltage and give a constant current, region 2. Region 3 and 4 are caused by ion avalanche as explained by the Townsend discharge mechanism. The Townsend discharge is a gas Ionization process where an initially very small amount of free Electrons accelerated by a sufficiently strong Electric field

Corona breakdown

Partial breakdown of the air occurs as a corona discharge on high voltage conductors at points with the highest electrical stress. In Electricity, a corona discharge is an Electrical discharge brought on by the Ionization of a Fluid surrounding a conductor, which As the dielectric strength of the material surrounding the conductor determines the maximum strength of the electric field the surrounding material can tolerate before becoming conductive, conductors that consist of sharp points, or balls with small radii, are more prone to causing dielectric breakdown. In Physics, the term dielectric strength has the following meanings Of an insulating material the maximum electric Field strength that it can withstand In Physics, the space surrounding an Electric charge or in the presence of a time-varying Magnetic field has a property called an electric field (that can Electrical conduction is the movement of electrically charged particles through a Transmission medium ( Electrical conductor) Remote Authentication Dial In User Service ( RADIUS) is a networking protocol that provides centralized access authorization and accounting management for people or computers Corona is sometimes seen as a bluish glow around high voltage wires and heard as a sizzling sound along high voltage power lines. Corona also generates radio frequency noise that can also be heard as 'static' or buzzing on radio receivers. Corona can also occur naturally at high points (such as church spires, treetops, or ship masts) during thunderstorms as St. Elmo's Fire. St Elmo's fire is an electrical Weather Phenomenon in which luminous plasma is created by a Coronal discharge originating from Although corona discharge is usually undesirable, until recently it was essential in the operation of photocopiers (Xerography) and laser printers. Xerography (or electrophotography) is a Photocopying technique developed by Chester Carlson in 1938 and Patented on October 6 A laser printer is a common type of Computer printer that rapidly produces high quality text and graphics on plain paper Many modern copiers and laser printers now charge the photoconductor drum with an electrically conductive roller, reducing undesirable indoor ozone pollution. OZONE is an object oriented Operating system written in the C programming language. Additionally, lightning rods use corona discharge to create conductive paths in the air that point towards the rod, deflecting potentially-damaging lightning away from buildings and other structures. A lightning rod (USA or lightning conductor (UK is a single component in a Lightning protection system. Lightning is an atmospheric discharge of Electricity, which typically occurs during Thunderstorms and sometimes during volcanic eruptions or ^[2]

Corona discharge ozone generators have been used for more than 30 years in the water purification process. Water purification is the process of removing contaminants and other harmful microorganisms from a raw water source Ozone is a toxic gas, even more potent than chlorine. In a typical drinking water treatment plant, the ozone gas is dissolved into the filtered water to kill bacteria and viruses. The Bacteria ( singular: bacterium) are a large group of unicellular Microorganisms Typically a few Micrometres in length bacteria have A virus (from the Latin virus meaning Toxin or Poison) is a sub-microscopic infectious agent that is unable Ozone also removes the bad odours and taste from the water. The main advantage of ozone is that the overdose (residual) decomposes to gaseous oxygen well before the water reaches the consumer. This is in contrast with chlorine which stays in the water and can be tasted by the consumer. Chlorine (ˈklɔriːn from the Greek word 'χλωρóς' ( khlôros, meaning 'pale green' is the Chemical element with Atomic number 17 and

Corona discharges are also used to modify the surface properties of many polymers. A polymer is a large Molecule ( Macromolecule) composed of repeating Structural units typically connected by Covalent Chemical bonds An example is the corona treatment of plastic materials which allows paint or ink to adhere properly.

See also

Measurement

Comparative Tracking Index

Discharges

Electrostatic discharge, corona discharge, Partial discharge, Direct current discharge, Lichtenberg figure, Townsend discharge

Coils

Ignition coil, Oudin coil, Induction coil, Tesla coil

People

Nikola Tesla, Nikolay Semyonov, Robert J. Van de Graaff, Thomas Burton Kinraide

References