Single-wire earth returnSingle-wire earth return (SWER) or single-wire ground return is a single-wire transmission line which supplies single-phase electric power from an electrical grid to remote areas at lowest cost. Its distinguishing feature is that the earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire) to act as a return path. Single-wire earth return is principally used for rural electrification, but also finds use for larger isolated loads such as water pumps.
Jeu de barresDans la distribution électrique un jeu de barres désigne un conducteur de cuivre ou d'aluminium qui conduit de l'électricité dans un tableau électrique, à l'intérieur de l'appareillage électrique ou dans un poste électrique. Le terme officiel est barre omnibus, mais il n'est guère employé. On lui préfère généralement, en français, le terme anglais "busbar" ou "bus-barre". Selon la définition donnée par la Commission électrotechnique internationale, il s'agit d'« un conducteur de faible impédance auquel peuvent être reliés plusieurs circuits électriques en des points séparés ».
Installation électriqueUne installation électrique est un ensemble cohérent de circuits électriques, d'appareillages électriques. Elle peut se situer dans un bâtiment ou un ensemble de bâtiments à usage d'habitation, industriel, commercial, ou de bureaux. L'étude de l'installation électrique est faite par un architecte ou un bureau d'études ou une entreprise d'installation et de maintenance en électricité La réalisation de l'installation électrique se fait par l'entreprise d'installation et de maintenance en électricité ou un artisan électricien.
Prospective short-circuit currentThe prospective short-circuit current (PSCC), available fault current, or short-circuit making current is the highest electric current which can exist in a particular electrical system under short-circuit conditions. It is determined by the voltage and impedance of the supply system. It is of the order of a few thousand amperes for a standard domestic mains electrical installation, but may be as low as a few milliamperes in a separated extra-low voltage (SELV) system or as high as hundreds of thousands of amps in large industrial power systems.
Compteur électriquealt=|vignette|Compteur électrique modulaire couramment utilisé pour toutes les applications de sous-comptage comme le suivi de la consommation de bornes de recharge, de stations photovoltaïques Un compteur d’énergie électrique ou compteur d’électricité ou compteur électrique est un organe électrique servant à mesurer la quantité d'énergie électrique consommée dans un lieu : habitation, industrie... Il est utilisé par les fournisseurs d'électricité afin de facturer la consommation d'énergie au client.
Load managementLoad management, also known as demand-side management (DSM), is the process of balancing the supply of electricity on the network with the electrical load by adjusting or controlling the load rather than the power station output. This can be achieved by direct intervention of the utility in real time, by the use of frequency sensitive relays triggering the circuit breakers (ripple control), by time clocks, or by using special tariffs to influence consumer behavior.
Distribution transformerA distribution transformer or service transformer is a transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer. The invention of a practical efficient transformer made AC power distribution feasible; a system using distribution transformers was demonstrated as early as 1882. If mounted on a utility pole, they are called pole-mount transformers.
Electricity retailingElectricity retailing is the final sale of electricity from generation to the end-use consumer. This is the fourth major step in the electricity delivery process, which also includes generation, transmission and distribution. Electricity retailing began at the end of the 19th century when the bodies which generated electricity for their own use made supply available to third parties. In the beginning, electricity was primarily used for street lighting and trams. The public could buy once large scale electric companies had been started.
Home networkA home network or home area network (HAN) is a type of computer network that facilitates communication among devices within the close vicinity of a home. Devices capable of participating in this network, for example, smart devices such as network printers and handheld mobile computers, often gain enhanced emergent capabilities through their ability to interact. These additional capabilities can be used to increase the quality of life inside the home in a variety of ways, such as automation of repetitive tasks, increased personal productivity, enhanced home security, and easier access to entertainment.
Low-voltage networkA low-voltage network or secondary network is a part of electric power distribution which carries electric energy from distribution transformers to electricity meters of end customers. Secondary networks are operated at a low voltage level, which is typically equal to the mains voltage of electric appliances. Most modern secondary networks are operated at AC rated voltage of 100–127 or 220–240 volts, at the frequency of 50 or 60 hertz (see mains electricity by country).
