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目前低压直埋ç”늼†é“ è£…层的现场处理方式多种多样åQŒæ—¢æœ‰å•ç«¯æŽ¥åœ°çš„åQŒä¹Ÿæœ‰ä¸¤ç«¯æŽ¥åœ°çš„ã€?a href="http://www.odhslm.icu/supply/11.html" target="_blank">四川电力ç”늼†æ‰¹å‘</a>˜q˜æœ‰ä¸¤ç«¯æ‚¬ç©ºéƒ½ä¸æŽ¥åœ°çš„。根据现场电¾~†ä¸¤ç«¯é’¢å¸¦é“ è£…处理方式的不同åQŒç”µ¾~†å‡ºçŽ°æ•…障后åQŒå…¶æ•…障点外观表现åŞ式会有所不同ã€?</p> <div> ç”늼†ä¸¤ç«¯é’¢å¸¦å…¨éƒ¨æ‚¬ç©ºåQŒä¸æŽ¥åœ°ã€‚电¾~†å‘生短路故障后åQŒå‡»½I¿ç‚¹å¯èƒ½åªæ˜¯ç”늼†¾U¿èµ\的局部位¾|®å‡ºçŽ°å‡»½I¿çƒ§æŸå­”‹zžï¼Œå››å·<a href="http://www.odhslm.icu/dldl/" target="_blank">电力ç”늼†</a>批发不会造成长距¼›Õd¤§é¢ç§¯çƒ§æ¯ç‚­åŒ–现象。因为当ç”늼†å±€éƒ¨é­å—意外机械损伤导致护套绝¾~˜ç ´æŸåŽåQŒç³»¾lŸå¯èƒ½ä¸ä¼šç«‹åŒ™Ÿ©é—¸æ–­ç”µï¼Œç ´æŸç‚¹ç”±äºŽåœŸå£¤ä¸­çš„水分和潮气作用åQŒç«¾U¿ä¼šå¯¹å¤§åœîCñ”生间歇式闪络攄¡”µçŽ°è±¡åQŒæœ€¾lˆå‘展äؓæ°æ€¹…性接地和盔R—´çŸ­èµ\而蟩闸停电,ç”׃ºŽç«çº¿å¯¹åœ°æ”„¡”µç”‰|µè¢«é™åˆ¶åœ¨ç”늼†çš„破损点位置åQŒæ”¾ç”는µ‹¹é€šè¿‡é’¢å¸¦å¯¹å¤§åœ°æ²¡æœ‰åŞ成分支回路,所以电¾~†å‘生故障后在电¾~†å…¨½E‹ä¸€èˆ¬åªæœ‰ä¸€ä¸ªç‚¹çŠ¶æ•…障。但是此旉™“ è£…层表面会带电,处于安全用电的考虑åQŒç”µ¾~†ä¸¤ç«¯å¤–露的铠装层必™åÕdš¾lç¼˜å¯†å°å¤„理ã€?</div> <div> ç”늼†¾U¿èµ\钢带采用单端接地或双端接地方式,四川电力ç”늼†æ‰¹å‘ç”늼†å‘生短èµ\故障后,故障可能是电¾~†çš„一个区ŒDµï¼Œç”늼†å±€éƒ¨åŒºåŸŸå¯èƒ½ä¼šå‡ºçŽ°é•¿è·¼›»è¡¨é¢çƒ§æ¯ç‚­åŒ–粘˜qžçŽ°è±¡ã€‚因为钢带采取此¿UæŽ¥æ³•åŽåQŒå½“ç”늼†å±€éƒ¨å‘生单相接地故障后会在ç”늼†çš„钢带中‹¹è¿‡æ¯”较大的接地短èµ\甉|µåQ›åŒæ—¶ç”µ¾~†çš„三相负荷甉|µä¹Ÿä¼šå‡ºçŽ°ä¸åã^衡现象,在钢带中可能˜q˜ä¼šä¼´éšäº§ç”Ÿæ¶¡æµçŽ°è±¡åQŒä¸¤¿Uç”µ‹¹å…±åŒæµ˜q‡é’¢å¸¦åŽåQŒé’¢å¸¦å°±ä¼šè±¡ä¸€ä¸ªå¤§åŠŸçŽ‡ç”늂‰ä¸€æ øP¼Œå¯¹ç”µ¾~†çš„护套和绝¾~˜åŠ çƒ­ï¼Œå†åŠ ä¸Šå®¢æˆ·å¼€å…³é€‰æ‹©ä¸å½“åQŒåœŸå£¤å±€éƒ¨æ•£çƒ­ä¸å¥½ï¼Œçƒ­é˜»˜q‡å¤§åQŒç”µ¾~†å±€éƒ¨é¢„留盘圈堆¿U¯ï¼Œæ•£çƒ­ä¸å¥½½{‰ä¸åˆ©åŽŸå› ï¼Œž®±å¯èƒ½é€ æˆç”늼†¾lç¼˜ã€æŠ¤å¥—出现长距离大面¿U¯çƒ§æ¯ç‚­åŒ–粘˜qžçŽ°è±¡ã€‚四川电力电¾~†æ‰¹å‘烧毁区域比较随机,可能在故障点附近åQŒè¿˜å¯èƒ½åœ¨å¦å¤–的区段åQŒå¾€å¾€åœ¨æ•£çƒ­æœ€å›°éš¾åQŒçƒ­é˜ÀLœ€å¤§çš„区段烧毁最严重。直到单相接地发展äؓ两相短èµ\后系¾lŸå¯èƒ½æ‰ä¼šèŸ©é—¸ï¼Œæ— æ³•é‡åˆé—”R€ç”µã€?</div> <div> 对于<a href="http://www.odhslm.icu/dydl/" target="_blank">低压ç”늼†</a>铠装架空ç”늼†åQŒåŠ å¼ºå¯¹ç”늼†ä¸‰ç›¸ç”‰|µå¤§å°çš„实时在¾U¿æ£€‹¹‹ç›‘视很有必要。同旉™“ çŠ¶å±‚接地后,应加装铠装层甉|µäº’感器对钢带甉|µæ—¶æ—¶ç›‘测。对ç”늼†å‡ºçŽ°çš„单相接地短路故障,提前发现和处理,以避免电¾~†å‘生长距离烧毁现象åQŒé€ æˆä¸å¿…要的电力¾læµŽæŸå¤±åQŒä¿è¯ç”µ¾|‘运行的¾læµŽåž‹ï¼Œå¯é æ€§ï¼Œ½E›_®šæ€§å’Œå®‰å…¨æ€§ã€?</div> <div> 按照正常的分析,直埋低压ç”늼†å‘生短èµ\故障后,四川电力ç”늼†æ‰¹å‘故障点一般应该只有一个。但在实际现场电¾~†æ•…障点开挖处理过½E‹ä¸­å‘现åQŒä½ŽåŽ‹ç”µ¾~†æ•…障可能会出现两个或多个故障点åQŒåŒæ—¶å¯èƒ½è¿˜ä¼šä¼´éšå‡ºçŽ°é•¿è·ç¦»¾lç¼˜æŠ¤å¥—发热烧毁炭化¾_˜è¿žçŽ°è±¡ã€‚笔者认ä¸ÞZ½ŽåŽ‹é“ è£…电¾~†å‡ºçŽ°æ•…障现象的不同可能会与ç”늼†é“ è£…的接地或不接地有养I¼Œè§‚点和看法不一定正¼‹®ã€‚希望对此类现象有真挚灼见的专业人士能提出更为科学权威的分析和看法。以揭开该现象äñ”生的深层原因ã€?</div> </div> <div class="prev mk">上一个äñ”品:<a href="/supply/12.html">成都高压ç”늼†åŽ‚家</a></div> <div class="next mk">下一个äñ”品:<a href="/supply/10.html">成都低压ç”늼†</a></div> <div class="xgbq mk">相关标签:<a href='/key.aspx?k=%b5%cd%d1%b9%b5%e7%c0%c2'>低压ç”늼†</a>,<a href='/key.aspx?k=%cb%c4%b4%a8%b5%e7%c1%a6%b5%e7%c0%c2%c5%fa%b7%a2%bc%db%b8%f1'>四川电力ç”늼†æ‰¹å‘ä»äh ¼</a>,<a 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