Distribution Equipment

Distribution Equipment

 

electric-power equipment designed to receive electric power from power-station generators, from transformers, or from converters in converter substations and to distribute it among individual consumers. It comprises electric switches, disconnecting switches, current and voltage transformers, measuring instruments, buses, dischargers, and electric reactors. In order to allow maintenance of the distribution equipment or portions of the electric-power network without interruption of service, the bus system is divided into sections.

Equipment installations may be classified according to structural design as indoor or outdoor. Indoor installations are generally used for voltages up to 10 kilovolts (kV). They have all apparatus and current-carrying parts located inside a building. Where the atmosphere is heavily polluted or where deposits of dust, chemical products, or salt from the ocean may settle on insulators and act as electric conductors, indoor installations are used for voltages up to 220 kV. Outdoor installations are primarily used for voltages of 35 kV and higher. They have all apparatus mounted outside of buildings.

In order to reduce the area occupied by electric distribution equipment, shorten the time for assembly and repairs, reduce the operating costs, and increase safety during servicing, all equipment units operating at voltages up to 35 kV are commonly mounted at the factory in metal cabinets or cases. In distribution equipment with voltages less than 10 kV, the current-carrying parts in such assemblies are insulated by means of ceramic insulators and air or by cast-epoxy insulation. Since the late 1960’s, compact, hermetically sealed assemblies have become popular for voltages up to 66 kV and higher in which sulfur hexafluoride (SF6) at a pressure of several atmospheres serves as insulation.

REFERENCES

Chunikhin, A. A. Elektricheskie apparaty. Moscow, 1967.
Lisovskii, G. S., and M. E. Kheifits. Glavnye skhemy i elektrotekhnicheskoe oborudovani epodstantsii 35-500 kv. Moscow, 1970.
Poltev, A. I. Elegazovye apparaty. Leningrad, 1971.

A. M. BRONSHTEIN

References in periodicals archive ?
Installing Service Conductors From The Electrical Service Equipment To Downstream Distribution Equipment B.
para]]NEW YORK, June 18, 2015 /PRNewswire/ -- This report analyzes the worldwide markets for Electric Power Transmission and Distribution Equipment in US$ Million by the following Segments: Transformers, Switchgears, and Others.
com/research/q9tbbj/electric_power) has announced the addition of the "Electric Power Transmission and Distribution Equipment - Global Strategic Business Report" report to their offering.
Global demand for electric transmission and distribution equipment is forecast to rise 6.
The partnership will see the firms bring together Alstom's grid management solutions - including vast experience with transmission and distribution equipment - and Toshiba's product range that includes smart meters and storage batteries, together with its customer-point power distribution equipment.
Radian) subsidiary located in Alexandria, Virginia, includes 24 Air Force flight line configuration power units and other distribution equipment, which comprises 12 complete Harvest Eagle systems.
More than 30 years old and eligible for state funds to modernize their technological capabilities, the schools will get cable wiring and video distribution equipment to provide data networking and video distribution campuswide.
The AKD switchgear is electrical distribution equipment which houses and controls a number of feeder breakers.
The effects of EMF on the office environment vary based upon the fundamental differences among (1) 60 Hertz electric and magnetic fields, (2) the fields produced by power distribution equipment and (3) the fields produced by office equipment.
The Southern Cone markets for HV electricity transmission and distribution equipment have experienced steady growth during the last years as a consequence of increasing government concerns about the state of the market infrastructure.
Contract notice: Enterprise framework contract hev 10-20 kv substation hibajavE[degrees]tEisEira distribution equipment, replacement of main parts.
LONDON, March 2, 2015 /PRNewswire/ -- This industry report package offers the most up-to-date market data on the actual market situation, trends, and future outlook for electricity control and distribution equipment in different American countries.

Full browser ?