Electric power systems components

electrical safety device

thumb|right|250px|A thyristor (silicon controlled rectifier) and associated mounting hardware. The heavy threaded stud attaches the device to a [[heatsink to dissipate heat.]]

A thyristor (, from a combination of Greek language θύρα, meaning "door" or "valve", and transistor) is a solid-state semiconductor device which can be thought of as being a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under control of a gate electrode, that is used in high-power applications like inverters and radar generators. It usually consists of four layers of alternating P- and N-type materials. It acts as a bistable switch (or a latch). There are two designs, differing in what triggers the conducting state. In a three-lea

electrical device that uses batteries to prevent a power flow interruption

electronic device or circuitry that converts direct current (DC) to alternating current (AC)

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

capture of energy produced at one time for use at a later time

thumb|360x360px|A chassis dynamometer.

used to stabilize the current flow in lamps

thumb|Copper busbar in a panel thumb|upright|1500 ampere [[copper busbars within a power distribution rack for a large building]]

In electrical engineering, a disconnector, disconnect switch or isolator switch is a type of switching device with visible contacts, used to ensure that an electrical circuit is completely de-energized for service or maintenance. They are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair. Disconnectors can be operated manually or by a motor, and may be paired with an earthing switch to ground the portion that has been isolated from the system for ensuring the safety of equipment and the per

electrical appliance

type of adjustable-speed drive

thumb|222px|Aircraft radio modulator unit from the Second World War, showing a dynamotor (the black cylinder) which converts the aircraft's 24–28 V DC to 500 V DC for the transmitter. Dübendorf Museum of Military Aviation

thumb|High-voltage switchgear thumb|A section of a large switchgear panel thumb|Tram switchgear thumb|This circuit breaker uses both SF6 and air as insulation.

electrical process for maximizing the effectiveness of photovoltaic cells

electronic component, power diode

Operation and description of the mercury-vapour rectifier

device used with AC electrical motors

electrical safety device

relay device designed to trip a circuit breaker when a fault is detected

conversion of electric energy from one form to another

thumb|Four reclosers on the right side of a substation In electric power distribution, a recloser, also known as autorecloser or automatic circuit recloser (ACR), is a switchgear designed for use on overhead electricity distribution networks to detect and interrupt transient faults. Reclosers are essentially rated circuit breakers with integrated current and voltage sensors and a protection relay, optimized for use as a protection asset. Reclosers are governed by the IEC 62271-111/IEEE Std C37.60 and IEC 62271-200 standards. The four major classes of operating maximum voltage are 15.5 kV, 27 k

circuit breaker that detects electric arc faults

right|thumb|This synchroscope was used to synchronize a factory's power plant with the utility's power grid. In AC electrical power systems, a synchroscope is a device that indicates the degree to which two systems (generators or power networks) are synchronized with each other.

electrical machine

electrical safety device

switch used for high-voltage applications.

set of electrical devices for providing fast-acting reactive power on high-voltage electricity transmission networks

switching device used in high voltage power grids

apparatus to convert DC electrical (solar, wind) energy to AC and deliver it back to the grid

thumb|Topology of blocking mode cycloconverter A cycloconverter (CCV) or a cycloinverter converts a constant amplitude, constant frequency AC waveform to another AC waveform of a lower frequency by synthesizing the output waveform from segments of the AC supply without an intermediate DC link ( and ). There are two main types of CCVs, circulating current type and blocking mode type, most commercial high power products being of the blocking mode type.

piece of machine equipment

component of the electrical power system

protection device or circuit in electric systems

regulating device used on alternating current electricity transmission networks

Is any energised conductor that passes through an earthed field in accordance with IEC60137

Low resistance electrical conductor for high current transmission and distribution

improving signal and data transmission quality

tuned mass damper used to suppress wind-induced vibrations especially on overhead power lines

type of multispeed induction motor

assembly of one or more enclosed sections having a common power bus and principally containing motor control units

device which measures the electrical waves on an electricity grid

type of converter

overhead electrical line running from a utility pole