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Protective relay

Index Protective relay

In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected. [1]

29 relations: ANSI device numbers, Avalanche diode, Bipolar junction transistor, British Standards, Circuit breaker, Current transformer, Diode, Electric power, Electrical engineering, Electromagnetic induction, Field-effect transistor, Galileo Ferraris, Galvanometer, International Electrotechnical Commission, Magnetic circuit, Magnetism, Overcurrent, Power engineering, Power-system protection, Reed relay, Relay, Residual-current device, SCADA, Static relay, Switch, Transistor, Unijunction transistor, Vacuum tube, Zener diode.

ANSI device numbers

In the design of electrical power systems, the ANSI standard device numbers (ANSI /IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations) identifies the features of a protective device such as a relay or circuit breaker.

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Avalanche diode

In electronics, an avalanche diode is a diode (made from silicon or other semiconductor) that is designed to experience avalanche breakdown at a specified reverse bias voltage.

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Bipolar junction transistor

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British Standards

British Standards (BS) are the standards produced by the BSI Group which is incorporated under a Royal Charter (and which is formally designated as the National Standards Body (NSB) for the UK).

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Circuit breaker

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

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Current transformer

A current transformer (CT) is a type of transformer that is used to measure alternating current (AC).

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Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.

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Electric power

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

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Electrical engineering

Electrical engineering is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism.

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Electromagnetic induction

Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.

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Field-effect transistor

The field-effect transistor (FET) is a transistor that uses an electric field to control the electrical behaviour of the device.

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Galileo Ferraris

Galileo Ferraris (31 October 1847 – 7 February 1897) was an Italian physicist and electrical engineer, one of the pioneers of AC power system and an inventor of the three-phase induction motor.

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Galvanometer

A galvanometer is an electromechanical instrument used for detecting and indicating electric current.

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International Electrotechnical Commission

The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

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Magnetic circuit

A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux.

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Magnetism

Magnetism is a class of physical phenomena that are mediated by magnetic fields.

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Overcurrent

In an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment.

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Power engineering

Power engineering, also called power systems engineering, is a subfield of electrical engineering that deals with the generation, transmission, distribution and utilization of electric power, and the electrical apparatus connected to such systems.

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Power-system protection

Power-system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults through the isolation of faulted parts from the rest of the electrical network.

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Reed relay

A reed relay is a type of relay that uses an electromagnet to control one or more reed switches.

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Relay

A relay is an electrically operated switch.

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Residual-current device

A residual-current device (RCD), or residual-current circuit breaker (RCCB), is a device that instantly breaks an electric circuit to prevent serious harm from an ongoing electric shock.

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SCADA

Supervisory control and data acquisition (SCADA) is a control system architecture that uses computers, networked data communications and graphical user interfaces for high-level process supervisory management, but uses other peripheral devices such as programmable logic controllers and discrete PID controllers to interface with the process plant or machinery.

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Static relay

In electrical systems, a static relay is a type of relay, an electrically operated switch, that has no moving parts.

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Switch

In electrical engineering, a switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

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Transistor

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

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Unijunction transistor

A unijunction transistor (UJT) is a three-lead electronic semiconductor device with only one junction that acts exclusively as an electrically controlled switch.

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Vacuum tube

In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

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Zener diode

A Zener diode is a particular type of diode that, unlike a normal one, allows current to flow not only from its anode to its cathode, but also in the reverse direction, when the Zener voltage is reached.

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Redirects here:

Differential relay, Distance relay, EOCR.

References

[1] https://en.wikipedia.org/wiki/Protective_relay

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