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ÀÛ¼ºÀÏ : 10-06-09 18:41
What does plenum mean?
 ±Û¾´ÀÌ : ¿Â¶óÀÎ7707
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<<What does plenum mean?>>
Plenum(³­¿¬)ÀÌ ÀǹÌÇÏ´Â °ÍÀº ¹«¾ùÀϱî? Á¤ÀÇ,Çʿ伺, ³­¿¬Ã³¸®µÈ Àç·á, °¡°ÝÀû Ãø¸é
(source:www.belden.com)

¡ÝPlenum Defined    
Plenum means "air bag". A Plenum area, is the air return for an air conditioning system. In most buildings, the area above a drop ceiling or under a raised floor is used as the air return(source of air)for the air conditioning. Those drop ceiling and raised floors are also where wire is often installed. If wire and cable is installed in a drop ceiling or raised floor, it is out of sight. If that cable were burning, it would give off toic fumes. These would be fed to the rest of the building by the air conditioner as a result people could be injured even though they are a long way from the fire.

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plenumÀº '°ø±âÁÖ¸Ó´Ï'¸¦ ÀǹÌÇÕ´Ï´Ù. ´Ù¸¥ ¸»·Î Çؼ­, plenum °ø°£À̶ó´Â °ÍÀº °ø±âÁ¶ÀýÀåÄ¡¸¦ À§ÇÑ °ø±âÀÇ ¼øȯ·Î¶ó°í ÇÒ¼ö ÀÖ½À´Ï´Ù. ´ëºÎºÐÀÇ °Ç¹°¿¡¼­ ³»¸²ÃµÀå À§ ¶Ç´Â ¿Ã¸²¸¶·ç(¹Ù´Ú À§¿¡ ¶Ç ´Ù½Ã ¸¶·ç¸¦ ¼³Ä¡ÇÑ°ÍÀ¸·Î ¸¶·ç°£ÀÇ °ø°£¿¡ Àü¿ø¿ë ÄÉÀ̺íÀ̳ª Áß¾Óó¸® ÀåÄ¡¿Í °¢ ÀÔÃâ·Â ÀåÄ¡°£ÀÇ ÄÉÀÌºí µîÀ» ³Ö¾î¼­ Ç¥¸é¿¡ ³ª¿ÀÁö ¾Ê°Ô ÇÑ´Ù)¾Æ·¡ ºÎºÐÀº °ø±âÁ¶Àý ÀåÄ¡°¡ Àß ÀÛµ¿µÇµµ·Ï Çϱâ À§ÇÑ °ø±âÀÇ ¼øȯ·Î ¿ªÇÒÀ» ÇÕ´Ï´Ù. ÀÌ·¯ÇÑ ³»¸² õÀå°ú ¿Ã¸² ¸¶·ç´Â ¶ÇÇÑ Àü¼±µéÀÌ ÁÖ·Î ¼³Ä¡µÇ¾îÁö´Â Àå¼ÒÀ̱⵵ Çϸç, ¸¸¾à Àü¼±µéÀÌ ³»¸²ÃµÀå ¶Ç´Â ¿Ã¸²¸¶·ç¾È¿¡ ¼³Ä¡µÇ¾îÁø´Ù¸é, ÀÌ Àü¼±µéÀº ¿ì¸®ÀÇ ´«¿¡ º¸ÀÌÁö ¾Ê°Ô µË´Ï´Ù. ÀÌ·¯ÇÑ »óȲ¿¡¼­ ¸¸¾à Àü¼±µéÀÌ ºÒ¿¡ Ÿ´Â°æ¿ì°¡ ¹ß»ýÇÑ´Ù¸é, ±×°ÍÀº ¼ö¸¹Àº µ¶¼º ¿¬±âµéÀ» »Õ¾î³¾°ÍÀÔ´Ï´Ù. ÀÌ·¯ÇÑ µ¶¼º ¿¬±âµéÀº °ø±âÁ¶Àý ÀåÄ¡¿¡ ÀÇÇØ °Ç¹°³» ´Ù¸¥ºÎºÐÀ¸·Î Èê·¯µé¾î°¡°Ô µÉ°ÍÀ̸ç, °á°úÀûÀ¸·Î »ç¶÷µéÀÌ ºÒÀ̳­°÷À¸·ÎºÎÅÍ ¸Ö¸® ¶³¾îÁ® ÀÖ´Ù ÇÏ´õ¶óµµ ÀÌ·Î ÀÎÇØ ¸¹Àº ÇÇÇظ¦ ÀÔ°Ô µÉ°ÍÀÔ´Ï´Ù.

¡ÝNeed for Plenum
Plenum cables are tested in a special way(UL 910 Steiner Tunnel Test) to make sure the cable will not allow the fire to continue burning and spread this doesn't mean the wires will work: all wires will eventually melt under heat. It is just that they won't be the fuel for the fire

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plenum cableÀº UL 910 Steiner Tunnel Test¶ó´Â Ưº°ÇÑ ¹æ¹ýÀÇ °Ë»ç¸¦ °ÅÄ£ Á¦Ç°µéÀÔ´Ï´Ù. ±×¸®°í ÀÌ Å×½ºÆ®´Â plenum cableÀÌ ºÒÀÌ ³µÀ»¶§ ºÒÀÌ °è¼Ó ¹ßÈ­Çϰųª ´Ù¸¥°÷À¸·Î ÆÛÁö°Ô²û ÇÏÁö ¾ÊÀ½À» Áõ¸íÇÑ´Ù´Â °ÍÀ̱⵵ ÇÕ´Ï´Ù. ±×·¯³ª ÀÌ·¯ÇÑ ³»¿ëÀÌ ÄÉÀ̺íÀÌ ¾î¶² ƯÁ¤ÇÑ ÀÛ¿ëÀ»Çؼ­ ±×·¸°Ô ÇÑ´Ù´Â °ÍÀ» ÀǹÌÇÏ´Â °ÍÀÌ ¾Æ´Ï¶ó, ¸ðµç ÄÉÀ̺íµéÀº ºÒÀÌ ³¯ °æ¿ì °á°úÀûÀ¸·Î´Â ±×¿­¶§¹®¿¡ ´Ù ³ì°Ô µË´Ï´Ù. ´Ù¸¸ plenum cableÀº ºÒÀÌ ³µÀ» °æ¿ì À̺ÒÀÌ ´õ ¹ßÈ­ÇÏ°Ô²û ±× »óȲ¿¡¼­ ºÒÀÇ ¿¬·á·Î½á´Â ÀÛ¿ëÇÏÁö ¾Ê´Â ´Ù´Â °ÍÀ» ÀǹÌÇÕ´Ï´Ù.

¡ÝPlenum Rated Materials
There are many materials which can meet plenum specifications. The most common is Teflon by Dupont, which comes in many forms:FEP, TFE, PTFE, all of which are used in cables There are other materials , such as Solef and Halar which can meet plenum specifications. There are also PVC versions, such as Flamarrest from Belden which can meet plenum specifications in certain constructions. There is also a lot of work on combined materials such as a data cable where one or two pairs out of four are one material and the others are another material. These combinations have successfully passed Plenum tests and signigicantly reduce dependence on high- cost plenum-rated materials.

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plenum ¼¼ºÎ»çÇ× Á¶°ÇµéÀ» ¸¸Á·½Ãų¼ö ÀÖ´Â Àç·áµéÀº ¾ÆÁÖ ¸¹½À´Ï´Ù. ±×Áß °¡Àå ÀϹÝÀûÀÎ Àç·á´Â Dupont»ç¿¡¼­ ¸¸µé¾îÁø TeflonÀÌ ÀÖ½À´Ï´Ù. TeflonÀº FEP, TFE, PTFEµî ´Ù¾çÇÑ ÇüÅ·ΠÁ¦À۵ǾîÁö¸ç, À̸ðµç °ÍµéÀº ÄÉÀÌºí¿¡ »ç¿ëµÇ¾îÁú¼ö ÀÖ½À´Ï´Ù. ±× ¿Ü¿¡ plenum ¼¼ºÎ»çÇ× Á¶°ÇµéÀ» ¸¸Á·½ÃÅ°´Â Solef ¿Í Halar¿Í °°Àº Àç·áµé°ú ¶ÇÇÑ Æ¯º°ÇÑ ±¸¼ºÀ¸·Î plenum ¼¼ºÎ»çÇ×µéÀ» ¸¸Á·½ÃÅ°´Â BeldenÀÇ Flamarrest¿Í °°Àº PVC ¹öÀüµµ ÀÖ½À´Ï´Ù. ±×¸®°í ÃÖ±Ù¿¡´Â data cable¿¡¼­¿Í °°ÀÌ ³×°³ÀÇ pair¿¡¼­ Çϳª ¶Ç´Â µÎ°³ÀÇ pair°¡ ÇÑ Àç·áÀÌ°í ³ª¸ÓÁö°ÍÀº ´Ù¸¥ Àç·á¸¦ »ç¿ëÇÑ Áï Àç·áµéÀ» È­ÇÕÇؼ­ ¸¸µç ÄÉÀÌºíµµ ³ª¿À°í ÀÖ½À´Ï´Ù.
ÀÌ·¯ÇÑ Á¶ÇÕÀº ¸ðµÎ plenum test¿¡¼­ ÇÕ°ÝÀ» ÇßÀ¸¸ç °¡Àå Áß¿äÇÑ Á¡À¸·Î´Â plenum 󸮸¦ ÇÑ Àç·áµéÀÌ °íºñ¿ëÀÓÀ» °¨¾ÈÇÒ¶§, ÀÌ·¯ÇÑ ºÎºÐ¿¡¼­ ¼º´É ´ëºñ °¡°ÝÀÌ È¿À²ÀûÀ̶ó ÇÒ ¼ö ÀÖ½À´Ï´Ù.

¡ÝCost of Plenum
Materials required to pass plenum testing makes plenum- rated cables much more expensive than non- plenum- rated designs. However, with the advent of alternate compounds and mixed compounds, the cost of plenum cables has dropped dramatically. At one time, pelnum cables were 3 to 5 times the cost of non-plenum. With newer materials and techniques, they are 2 to 3 times the cost

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plenum test¸¦ Åë°úÇÑ Àç·áµéÀº plenum cableÀÇ °¡°ÝÀ» ºñ½ÎÁö°Ô ¸¸µå´Âµ¥ °áÁ¤ÀûÀÎ ¿ªÇÒÀ» ÇÕ´Ï´Ù. Áï ÀÌ·¯ÇÑ Àç·áµé ¶§¹®¿¡ plenum cableÀÇ °¡°ÝÀÌ »ó½ÂÇÑ´Ù°í ÇÒ ¼ö ÀÖ½À´Ï´Ù. ±×·¯³ª ÃÖ±Ù ´ëü È¥ÇÕ¹°°ú È¥ÇÕ¹°µéÀ» ¼¯Àº Àç·á µéÀÇ ÃâÇöÀ¸·Î ÀÌ·¯ÇÑ plenum cableÀÇ °¡°ÝÀº ±Þ°ÝÇÏ°Ô °¨¼ÒÇÏ°í ÀÖ½À´Ï´Ù. µ¿½Ã¿¡ plenum cableÀº ±×·¸Áö ¾ÊÀº cableº¸´Ù 3~5¹è ºñ½ÎÁö¸¸ »õ·Î¿î Àç·áµé°ú ±â¼úµéÀÌ ¹ßÀüÇÔ¿¡ µû¶ó °¡°ÝÀº ÇöÀç 2~3¹è Á¤µµ·Î À¯ÁöµË´Ï´Ù.
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