An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers.[1] Each contact is a piece of electrically conductive material, typically metal. When a pair of contacts touch, they can pass an electrical current with a certain contact resistance, dependent on surface structure, surface chemistry and contact time;[2] when the pair is separated by an insulating gap, then the pair does not pass a current. When the contacts touch, the switch is closed; when the contacts are separated, the switch is open. The gap must be an insulating medium, such as air, vacuum, oil, SF6. Contacts may be operated by humans in push-buttons and switches, by mechanical pressure in sensors or machine cams, and electromechanically in relays. The surfaces where contacts touch are usually composed of metals such as silver or gold alloys[3][4] that have high electrical conductivity, wear resistance, oxidation resistance and other properties.[5]
^Relay Basics; Omron.
^Cite error: The named reference ecr was invoked but never defined (see the help page).
An electricalcontact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece...
A contactor is an electrically controlled switch used for switching an electrical power circuit. A contactor is typically controlled by a circuit which...
Electricalcontact resistance (ECR, or simply contact resistance) is resistance to the flow of electric current caused by incomplete contact of the surfaces...
deform when touching each other Contact process (mathematics), a model of an interacting particle system Electricalcontacts Sparśa, a concept in Buddhism...
these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m. Electrical conductivity (or specific conductance) is the reciprocal of electrical resistivity...
An ohmic contact is a non-rectifying electrical junction: a junction between two conductors that has a linear current–voltage (I–V) curve as with Ohm's...
of an electrical circuit are electrically connected if an electric current can run between them through an electrical conductor. An electrical connector...
flow between two electrical rotating parts, such as in a motor. Typically, a slip ring consists of a stationary graphite or metal contact (brush) which rubs...
An electrical injury, (electric injury) or electrical shock (electric shock) is damage sustained to the skin or internal organs on direct contact with...
movable electricalcontacts connected to external circuits. When a pair of contacts is touching current can pass between them, while when the contacts are...
for the study of tribology, contact stiffness, electricalcontact resistance and indentation hardness. Principles of contacts mechanics are implemented...
an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals...
applied to the reed switch contact area to serve as an electricalcontact switching (wear) surface and, for normally-open contacts, as a magnetic spacer whose...
electrodes during normal Wet operation. Contact arcing is so destructive that the electrical life of power relays and contactors is most often a fraction of their...
against the underside of the lowest overhead wire, the contact wire. Current collectors are electrically conductive and allow current to flow through to the...
operates an electricalcontact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure...
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity...
interfaces is analogous to the concept of electricalcontact resistance, also known as ECR, involving contact patch restricted transport of phonons rather...
process in which one metal corrodes preferentially when it is in electricalcontact with another, in the presence of an electrolyte. A similar galvanic...
rubber-tyred metro bogie. Between the two large tires, a contact shoe touches the guidebar and electrically grounds the car. Bumper cars Conduit current collection...
base or a bayonet base, with one or more contacts on the base. The shell may serve as an electricalcontact or only as a mechanical support. Bayonet base...
such as a battery, or to collect current from a sliding contact such as a pantograph. Electrically powered vehicles are used in public transportation, such...
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance...
In electrical and electronics engineering, wetting current is the minimum electric current needing to flow through a contact to break through the surface...
power line contact. Electrical burns can be classified into six categories, and any combination of these categories may be present on an electrical burn victim:...
Galvanic corrosion occurs when two different metals have physical or electricalcontact with each other and are immersed in a common electrolyte, or when...
an electrical signal Potentiometers consist of a resistive element, a sliding contact (wiper) that moves along the element, making good electrical contact...
below it and metallic electricalcontacts on a side. The plunger sits on the spring and the key will often close the contacts when the plunger is pressed...
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