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<span>æ–‡ç« å‡ºå¤„ï¼?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电å有é™å…¬å?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气ï¼?span
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<p>　　<span style="font-size: 14px">一)æ–线å¯èƒ½å¼•èµ·è°æŒ¯è¿‡ç”µåŽ?/span></p>
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<p><span style="font-size: 14px">　　导线的开æ–ã€å¼€å…³ä¸åŒæœŸåˆ‡åˆå’Œç†”æ–器ä¸åŒæœŸç†”æ–将引起é“ç£è°æŒ¯è¿‡ç”µåŽ‹ã€‚ç”±æ–线引起的è°æŒ¯è¿‡ç”µåŽ‹å¯èƒ½å¯¼è‡´é¿é›·å™¨çˆ†ç‚¸ï¼Œè´Ÿè½½å˜åŽ‹å™¨çš„相åºå倾和电气设备ç»ç¼˜é—ªç»œç‰çŽ°è±¡ã€?/span></p>
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<p><span style="font-size: 14px">　　äº?电ç£å¼ç”µåŽ‹äº’感器的è°æŒ¯è¿‡ç”µåŽ‹</span></p>
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<p><span style="font-size: 14px">　　由于电网å‚æ•°ä¸å¯¹ç§°ï¼Œå‘ˆçŽ°ä¸æ€§ç‚¹ä½ç§»ï¼Œå¸¸ä¼šå¼•èµ·é“ç£è°æŒ¯è¿‡ç”µåŽ‹ï¼Œä½¿ç”µç£å¼ç”µåŽ‹äº’感器的高压安全ä¸é¢‘ç¹ç†”æ–ï¼Œæˆ–é€ æˆäº’感器自身的烧æ¯ã€‚é™åˆ¶å’Œæ¶ˆé™¤é“ç£è°æŒ¯è¿‡ç”µåŽ‹çš„措施ï¼?/span></p>
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<p><span style="font-size: 14px">　　1ã€é€‰ç”¨åŠ±ç£ç‰¹æ€§è¾ƒå¥½çš„电压互感器或改用电容å¼äº’感器ã€?/span></p>
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<p><span style="font-size: 14px">　　2ã€ç”µç£å¼ç”µåŽ‹äº’感器的开å£ä¸‰è§’形绕组ä¸åŠ 装阻尼电阻，å¯æ¶ˆé™¤å„ç§è°æŒ¯çŽ°è±¡ã€?/span></p>
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<p><span style="font-size: 14px">　　3ã€æ¯çº¿ä¸ŠåŠ 装一定的对地电容，使XC0≤0.01XTè°æ¿å°±ä¸èƒ½å‘生ã€?/span></p>
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<p><span style="font-size: 14px">　　4ã€é‡‡ç”¨ä¸´æ—¶çš„倒闸措施，如投入消弧线圈，将å˜åŽ‹å™¨ä¸æ€§ç‚¹ä¸´æ—¶æŽ¥åœ°ä»¥åŠæŠ•å…¥äº‹å…ˆè§„定的些æŸçº¿è·¯æˆ–设备ç‰ã€?/span></p>
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<p><span style="font-size: 14px">　　ä¸?ç»ç¼˜æ°´å¹³è¦æ±‚é«?/span></p>
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<p><span style="font-size: 14px">　　å•ç›¸æŽ¥åœ°æ—¶ï¼Œéžæ•…障相对地电压å‡é«˜√3å€ã€‚所以，这ç§ç”µç½‘ä¸çš„设备ç»ç¼˜æ°´å¹³é«˜å’Œè´¹ç”¨å¤§ã€?/span></p>
<p> </p>
<p><span style="font-size: 14px">　　å›?å˜åœ¨å¼§å…‰æŽ¥åœ°è¿‡ç”µåŽ‹çš„å±é™©</span></p>
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<p><span style="font-size: 14px">　　å•ç›¸æŽ¥åœ°ç”µæµä¸å¤§æ—¶ï¼Œç”µæµæµè¿‡é›¶å€¼æ—¶çš„电弧将自行熄ç，故障消å¤?å•ç›¸æŽ¥åœ°ç”µæµå¤§äºŽ30安时，å‘生稳定电弧，将形æˆç»§ç»æ€§å¼§å…‰æŽ¥åœ°ï¼Œå°†ä¼šæŸå设备并导致两相甚至三相çŸè·?当接地电æµå¤§äº?0安å°äº?0安时，有å¯èƒ½å‘生一ç§ä¸ç¨³å®šçš„é—´æ‡æ€§ç”µå¼§ï¼Œéšä¹‹å°†å‘ˆçŽ°å¼§å…‰è¿‡ç”µåŽ‹ï¼Œå¹…值å¯è¾?.5è‡?å€ç›¸ç”µåŽ‹ï¼Œè¶³ä»¥å±åŠæ•´ä¸ªç”µç½‘çš„ç»ç¼˜ã€‚å˜åŽ‹å™¨çš„ä¸æ€§ç‚¹è£…设消弧线圈形æˆçš„电感电æµä¸Žç”µå®¹ç”µæµç›¸è¡¥å¿ï¼Œå°†ä½¿æŽ¥åœ°ç”µæµé™æ¢ï¼Œç”šè‡³è¿‘于零，从而消除了接地处的电弧以åŠç”±å®ƒå‘生和å±å®³ã€?/span></p>
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<p><span style="font-size: 14px">　　äº?接地继电ä¿æŠ¤çš„选择困难</span></p>
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<p><span style="font-size: 14px">ã€€ã€€å› è€Œè¦å®žçŽ°çµæ•çš„有选择性的维护就比较困难，特别是ç»æ¶ˆå¼§çº¿åœˆæŽ¥åœ°çš„电力网更困难ã€?/span></p>
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<p><span style="font-size: 14px">　　二ã€?/span><strong><a href="http://www.chenfeipower.com/Products/gongmoxianquan.html"><span style="font-size: 14px">高频å˜åŽ‹å™?/span></a></strong><span style="font-size: 14px">ä¸æ€§ç‚¹ä¸æŽ¥åœ°è¿è¡Œçš„优点</span></p>
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<p><span style="font-size: 14px">　　一)供电å¯é 性较é«?/span></p>
<p> </p>
<p><span style="font-size: 14px">　　当电网å‘生å•ç›¸æŽ¥åœ°æ•…障时，三相线电压和相电æµå˜åŒ–甚å°ã€‚由于ä¸æž„æˆçŸè·¯å›žè·¯ï¼Œå•ç›¸æŽ¥åœ°ç”µæµå¯¹ç”¨æˆ·ä¾›ç”µå½±å“ä¸å¤§ã€‚但是必需在较çŸæ—¶é—?一èˆ?å°æ—¶)内迅速清除故障，以å…故障扩大。由于çŸæ—¶é—´å†…ä¸è‡´è·³é—¸ï¼Œä¾›ç”µå¯é 性较高ã€?/span></p>
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<p><span style="font-size: 14px">　　äº?对通信和信å·ç³»ç»Ÿçš„干扰å°?/span></p>
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<p><span style="font-size: 14px">　　当三相基本对称è¿è¡Œæ—¶ï¼Œç”µåŠ›çº¿å¯¹å‘¨å›´ç©ºé—´å½¢æˆçš„电ç£åœºä¸å¤§ï¼Œä¸ä¼šå¯¹é€šè®¯å’Œä¿¡å·ç³»ç»Ÿå‘生干扰影å“。åŒç†ï¼Œç”±äºŽå˜åŽ‹å™¨ä¸æ€§ç‚¹ä¸æŽ¥åœ°çš„电路å•ç›¸æŽ¥åœ°ç”µæµè¾ƒå°ï¼Œå¯¹é‚»è¿‘的通讯线路和信å·ç³»ç»Ÿç‰å¼±ç”µå¹²æ‰°ä¹Ÿè¾ƒå°ã€?/span></p>
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