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<div class="pubnavejj"> <div class="g-wrap"> <div class="crumbs"><a href="/">首页</a> > <a href="/html/newslist31.html">新闻资讯</a> > <a href="/html/newslist171.html">行业新闻</a></div> </div> </div> <div class="ybaboutadesc wow fadeInUp delay_4s"> <div class="newdescall"> <div class="newdetail-title"> 防雷‹‚€‹¹‹å…¬å¸æµ…谈关于避雷器应用中的问题 <p>2020-12-3 15:12:56</p> </div> <div class="newdetail-con"><p>ç”׃ºŽé‰K›·å™¨æœ‰è‡ªèín˜q‡ç”µåŽ‹ä¿æŠ¤çš„问题åQŒé€‰ç”¨é‰K›·å™¨æ—¶è¦è€ƒè™‘其自íw«çš„防暂态过电压能力åQŒç»¼åˆæ¯”较保护间隙、管型避雷器、氧化锌遉K›·å™¨ã€ç¢³åŒ–硅遉K›·å™¨ã€ä¸²è”间隙氧化锌遉K›·å™¨å„¿Ué¿é›·å™¨çš„泄‹¹èƒ½åŠ›ã€ä¿æŠ¤è¿ž¾l­æ€§ã€é—´éš™ç‰¹æ€§ç­‰ä¼˜ç¼ºç‚¹åŠå…¶ç‰¹æ€§ã€‚分析避雷器使用中运行工å†ëŠš„监测情况ã€?/p><p><br/></p><p><strong>今天<a title="防雷‹‚€‹¹‹å…¬å? href="http://www.ceciartofliving.com" target="_self">防雷‹‚€‹¹‹å…¬å?/a>-国瑞‹‚€‹¹‹å¯¹é‰K›·é’ˆåº”用中的问题探è®?/strong></p><p><br/><strong>1.1遉K›·å™¨è‡ªíw«è¿‡ç”µåŽ‹é˜²æŠ¤é—®é¢˜</strong><br/>   遉K›·å™¨æ˜¯˜q‡ç”µåŽ‹ä¿æŠ¤ç”µå™¨ï¼Œå…¶è‡ªíw«ä»å­˜åœ¨˜q‡ç”µåŽ‹é˜²æŠ¤é—®é¢˜ã€‚对于能量有限的˜q‡ç”µåŽ‹å¦‚é›ïL”µ˜q‡ç”µåŽ‹å’Œæ“ä½œ˜q‡ç”µåŽ‹ï¼Œé‰K›·å™¨æ³„‹¹èƒ½èµ·é™åŽ‹ä¿æŠ¤ä½œç”¨ã€‚对能量是无限(æœ?补充能源åQ‰çš„˜q‡ç”µåŽ‹ï¼Œå¦‚暂态过电压åQˆå·¥é¢‘过电压和谐振过电压的æ€È§°åQ‰ï¼Œå…‰™¢‘率或为工频或为工频的整数倍或分数倍,与工频电源频率æ€ÀLœ‰åˆæ‹çš„时候,如因某些 原因而激发暂态过电压åQŒå·¥é¢‘电源能自动补充˜q‡ç”µåŽ‹èƒ½é‡ï¼Œå³ä‹É遉K›·å™¨æ³„‹¹è¿‡ç”µåŽ‹òq…å€ég¸è¡°å‡æˆ–只å¼Þp¡°å‡ï¼Œæš‚态过电压如果˜q›å…¥é‰K›·å™¨ä¿æŠ¤åŠ¨ä½œåŒºåQŒåŠ¿å¿…长时反复动 作直至热崩溃åQŒé¿é›·å™¨æŸåçˆ†ç‚¸åQŒå› æ­¤æš‚态过电压寚w¿é›·å™¨æœ‰è‡´å‘½å±å®Ÿë€‚如果已ž®†å…¨éƒ¨æš‚态过电压限定在保护死区内不受其危害的遉K›·å™¨ï¼Œ¿UîC¹‹ä¸ºæš‚态过电压承受èƒ?力强åQŒåä¹‹ç§°æš‚态过电压承受能力差。碳化硅遉K›·å™¨æš‚态过电压承受能力强,但由于运行中动作ç‰ÒŽ€§ç¨³å®šæ€§å·®åQŒå¸¸å› å†²å‡ÀL”¾ç”는µåŽ‹ï¼ˆä¿æŠ¤åŠ¨ä½œåŒø™“v始电压)å€ég¸‹é™ï¼Œ 仍可能遭受暂态过电压危害。无间隙氧化锌避雷器因其拐点电压åQˆå¯˜q‘似地把参考电压当作拐点电压)偏低åQŒä»…2.21ï½?.56UxgåQˆæœ€å¤§ç›¸ç”µåŽ‹åQ‰ï¼Œè€Œæœ‰äº›æš‚态过电压最大å€ÆD¾¾2.5ï½?.5UxgåQŒæ•…有暂态过电压承受能差的缺炏V€‚对暂态过电压危害有效防护办法是加¾l“构性能½E›_®šçš„串联间隙将全部暂态过电压限定在保护死区内åQŒä‹É遉K›·å™¨å…å—其危害。串联间隙氧化锌遉K›·å™¨æœ‰æ­¤ç‹¬å…·ä¼˜ç‚V€?/p><p><br/></p><p><strong>1.2遉K›·å™¨è‡ªíw«å¯¹ç”µåŠ›¾pȝ»Ÿä¸å®‰å…¨åª„å“?/strong><br/>   保护间隙和管型避雷器在间隙击½I¿åŽåQŒä¿æŠ¤å›žè·¯å†ä¹Ÿæ²¡æœ‰é™‹¹å…ƒä»Óž¼Œä¿æŠ¤åŠ¨ä½œéƒ½è¦é€ æˆæŽ¥åœ°æ•…障或相间短路故障,保护作用增多电力¾pȝ»Ÿæ•…障率,影响电力¾pȝ»Ÿçš?正常、安全运行。应用氧化锌遉K›·å™¨ï¼Œä»Žæ ¹æœ¬ä¸Šé¿å…ä¿æŠ¤ä½œç”¨äº§ç”ŸæŽ¥åœ°æ•…障或相间短路故障,且不用自动重合闸装置ž®Þpƒ½å‡å°‘¾U¿èµ\雷害停电事故ã€?/p><p><br/></p><p><strong>1.3遉K›·å™¨å…¶˜qžç®‹é›ïL”µå†²å‡»ä¿æŠ¤èƒ½åŠ›</strong><br/>  有时高压电力装置可能遭受˜qžç®‹é›ïL”µå†²å‡»åQŒè¿ž¾l­é›·ç”µå†²å‡ÀL˜¯æŒ‡ä¸¤‹Æ¡é›·ç”µå…¥ä¾‰|‡L间隔旉™—´ä»…数百μsè‡Ïx•°åƒÎ¼såQŒé—´éš”时间极短。碳化硅遉K›·å™¨ä¿æŠ¤åŠ¨ä½œæ—¢æ³„放é›?甉|µä¹Ÿæ³„攑ַ¥é¢‘箋‹¹ï¼Œåˆ‡æ–­¾l­æµæ—¶è€—最大达10000μsåQŒä¸€‹Æ¡ä¿æŠ¤åó@环时间要˜qœå¤§äº?0000μs才能恢复到可˜q›è¡Œå†æ¬¡åŠ¨ä½œèƒ½åŠ›åQŒæ•…¼„›_Œ–¼‹…避雷器没有˜qžç®‹é›ïL”µå†²å‡»ä¿æŠ¤èƒ½åŠ›ã€‚氧化锌遉K›·å™¨ä¿æŠ¤åŠ¨ä½œåªæ³„放é›ïL”µ‹¹ï¼Œé›ïL”µ‹¹æ³„放(ž®äºŽ100μsåQ‰å®Œæ¯•ï¼Œç«‹å³æ¢å¤åˆ°å¯˜q›è¡Œå†æ¬¡åŠ¨ä½œèƒ½åŠ›åQŒæ•…氧化锌避雷器å…ähœ‰˜qžç®‹é›ïL”µå†²å‡»ä¿æŠ¤èƒ½åŠ›ã€?/p><p><br/></p><p><strong>1.4工频能源的浪è´?/strong><br/>  只关注防雷器件泄æ”ùN›·ç”‰|µçš„限åQˆé™åQ‰åŽ‹ä¿æŠ¤ä½œç”¨åQŒè½»è§†æˆ–忽视有些器äšg同时泄放工频甉|µ‹¹ªè´¹èƒ½æºä½œç”¨ã€‚保护间隙或½Ž¡åž‹é‰K›·å™¨ä¿æŠ¤åŠ¨ä½œå¯èƒ½ä¼´éšçŸ­è·¯ç”µ‹¹ï¼ˆå‡ kA臛_‡ åkAåQ‰å¯¹åœ°æ”¾ç”µï¼Œ¼„›_Œ–¼‹…避雷器保护动作有工频箋‹¹ï¼ˆé‰K›·å™¨FS型äؓ50AåQŒFZ型äؓ80AåQŒFCD型äؓ250AåQ‰å¯¹åœ°æ”¾ç”µï¼Œè€Œé€ æˆèƒ½æº‹¹ªè´¹åQŒä‹É用氧化锌遉K›·å™¨å¯å½Õdº•é¿å…ä¿æŠ¤ä½œç”¨å¸¦æ¥çš„工频能源浪贏V€?br/></p><p></p><script src="/inc/AspCms_VisitsAdd.asp?id=17"></script></div> <div id="preandnext"> 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