Power failure transfer

Power failure transfer

In telecommunication, the term power failure transfer has the following meanings:

1. The switching of primary utilities to their secondary backup whenever the primary source operates outside its design parameters. This is accomplished via a transfer switch.

2. In telephony, a function which, when activated in the event of a commercial power failure or a low-voltage battery condition at a subscriber location, supplies power to predesignated subscriber equipment via the central office trunk.

"Note:" Power-failure transfer is an emergency mode of operation in which one and only one instrument may be powered from each trunk line from the subscriber location to the central office.

Source: From Federal Standard 1037C


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • power failure -- transfer —    If the PBX is not receiving enough power, this feature provides limited service to and from the exchange network …   IT glossary of terms, acronyms and abbreviations

  • Transfer switch — Transfer switches allow switching from a primary power source to a secondary or tertiary power source and are employed in some electrical power distribution systems. Most often transfer switches can be seen where emergency power generators are… …   Wikipedia

  • power — {{Roman}}I.{{/Roman}} noun 1 authority/control ADJECTIVE ▪ absolute, ultimate ▪ considerable, enormous, tremendous ▪ real ▪ …   Collocations dictionary

  • Electrical power industry — The electrical power industry provides the production and delivery of electrical power (electrical energy), often known as power, or electricity, in sufficient quantities to areas that need electricity through a grid. Many households and… …   Wikipedia

  • emergency transfer —    See power failure transfer …   IT glossary of terms, acronyms and abbreviations

  • Power Transfer Unit — The purpose of the Power Transfer Unit (PTU) is to produce hydraulic pressure in the left hydraulic system in the event of a left hydraulic system engine driven pump failure.The PTU is used when there is right hydraulic system pressure but no… …   Wikipedia

  • Uninterruptible power supply — A small free standing UPS …   Wikipedia

  • Dinorwig Power Station — Part of the power station as seen on the exterior of Elidir Fawr …   Wikipedia

  • Electric power transmission — Electric transmission redirects here. For vehicle transmissions, see diesel electric transmission. 400 kV high tension transmission lines near Madrid Electric power transmission or high voltage electric transmission is the bulk transfer of… …   Wikipedia

  • Three-phase electric power — This article deals with where, how and why three phase is used. For information on the basic mathematics and principles of three phase, see three phase. Three phase electric power is a common method of alternating current electric power… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”