de-energize circuit
11Passive infrared sensor — A Passive InfraRed sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR based motion detectors (see below). Apparent… …
12Autorecloser — In electric power distribution, an autorecloser is a circuit breaker equipped with a mechanism that can automatically close the breaker after it has been opened due to a fault. [Richard c. Dorf (ed.) The Electrical Engineering Handbook , CRC… …
13Thermostat — This article is about the temperature regulating device. For the French cooking oven temperature scale, see Gas Mark#Other cooking temperature scales. Honeywell s iconic The Round model T87 thermostat, one of which is in the Smithsonian …
14Wrong-side failure — A wrong side failure describes a failure condition in a piece of railway signalling equipment that results in an unsafe state. A typical example would be a signal showing a proceed aspect (e.g. green) when it should be showing a stop or danger… …
15Railway slide fence — Part of a railway signaling system, a slide fence is a fence whose purpose is to prevent trains from being derailed by rock slides in mountainous areas where rock slides may occur without warning. The fence is designed to be displaced by a rock… …
16Transformer — This article is about the electrical device. For the toy line franchise, see Transformers. For other uses, see Transformer (disambiguation). Pole mounted distribution transformer with center tapped secondary winding. This type of transformer is… …
17Electromagnet — An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current is turned off. Electromagnets are widely used as components of other electrical devices,… …
18Switchgear — The term switchgear, used in association with the electric power system, or grid, refers to the combination of electrical disconnects, fuses and/or circuit breakers used to isolate electrical equipment. Switchgear is used both to de energize… …
19Electrical wiring (United States) — Electrical wiring in general refers to conductors used to carry electricity and their accessories. General aspects of electrical wiring as used to provide power in or to buildings and structures, commonly referred to as building wiring, are… …
20Ferroresonance — The phenomenon of Ferroresonance is the occurrence of an unstable high voltage, typically on 3 phase electrical systems which only occurs under specific conditions. The nature of the overvoltage can cause the failure of equipment.Ferroresonance… …
