IEEE 979-2012 pdf free download – IEEE Guide for Substation Fire Protection.
3.1 General terms
control building: A building or stnacture in a subsiation that contains protection, control. sysiem control and data acquisition (SCADA). and tcleconimunication.. equipment. electrical puncls, battery banks, and other auxiliary equipment. In this guide, this term may be used interchangeably with other commonly used tcinis such as contiol house or control enclosure.
fire pmitectian: The study and applicatirin of measures to prevent, detect. extinguish, control, or deal with ftres, and the subsequent impact on people, assets, business activities, or the environment.
hazard: Any source of potential damage. harm. or adverse health effects on something or sotncottc under certain conditions at work.
risk: The chance or probability that a person will be harmed or experience an adverse health effect if exposed to a lia,ard. It may also apply to sitnstnnis with property or r9uipmcnt loss
switehyard: The outdoor portioti of a substation with only a single voltage level. In nsultivoltage substations, the switchyards are typically connected by one or more powvr transformers.
3,2 Fire-suppressIon system terms
rican agent gas nrc e’.tinguisliing ssstems: A fire protection system that uses clean gaseous agents that are (I) electrically nonconducting. (2) volatile or gaseous. and (3) do not leave a residue on evaporation. The system discharges the agent for the purpose of achieving a specified rnmimum agent concentration throughout a hazard volume. A clean agent coniplies with restnctions on the production of certain Halon fire extinguislting agents under the Montreal Protocol signed September 16. 1987.
drltigr sprinkler system: A spnnkler systeni employing open spnnklers that are attached to a piping system that is connected to a water supply through a valve that is opened by the operation of a detection system installed in the same smas as the sprinklers- When this valve opens, water flows into the piping system and discharges from all spnnklers attached thereto.
double i.terloek preaetlon sprinkler system: A Pit-action system that admits water to sprinkler ping on operation of both detection devsces and automatic sprinklers and only discharges from opened sprinklers. This type of an’angement provides the most redtatdancy to reduce the probabiltty of accidental sprinkler discharge by requiting both detection devices and sprinklers to activate indepcndctstly prior to water being admitted to the piping network. This type of arrangement also allows for pressure m.initonng to detect leaks in the piping network or open sprinklers prior to water being admitted to the system.
dry pipe sprinkler nsiem: A sy’saens employing automatic sprinklers that ate attached to a piping systeni containing air or nitrogen under pressure, the release of which (as from the opening of a spnnkler) permits the water pressure to open a valve known as a thy pipe valve, and Use water then flows into the piping system and out the opened sprinklers.
foam-water system: A spnnkler system that generates a foam-water solution and discharges it onto the hazard to he protected utilizing air-aspirating foam-water sprinklers or nozzics or non-air-aspirating standanl sprinklers.
sprinklers are attached in a aystemattc pattern. Each system has a control valve located in the system riser or its supply piping. Each sprinkler system includes a device for actuating an alarm when the system is in operation The installation includes at least one automatic water -supply that supplies one or more systems The system is usually activated by heat from a fire and discharges water over the fire area
sitigle Interlock preseilo. sprinkler system: A single iittetlock system is a Prcsction system that admits water.to.spnnkler piping tspmi operation of detection devices and discharges out only the opened sprinklers. This type of arrangement reduces the probability of accidental sprinkler discharge by requiring the activation of a detection device pniir to admitting water to the spnnkler piping and then requtnng a sprinkler head to open prior to water flow
water mIst system: A distribution system connected to a water supply or water and atomizing media supplies that is equipped with one or more nonles capable of delivering water mist tntended to control, suppress, or exttnguish fires, Water mtst systems mtist only be used for applications that they are listed for or where specific resestch and testing has validated the application.IEEE 979 pdf download.