大乐透周三走势图

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电工必须掌握的40个电气二次回路知识

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电工必须掌握的40个电气二次回路知识

发布日期:2016-07-27 作者: 点击:


  1、JISUANJIGOUCHENGBAOHUYUYUANYOUJIDIANBAOHUYOUHEQUBIE?

ZHUYAOQUBIEZAIYUYUANYOUDEBAOHUSHURUSHIDIANLIU、DIANYAXINHAO,ZHIJIEZAIMONILIANGZHIJIANJINXINGBIJIAOCHULI,SHIMONILIANGYUZHUANGZHIZHONGJIDINGZULIJUJINXINGBIJIAOCHULI。ERJISUANJIZHINENGZUOSHUZIYUNSUANHUOLUOJIYUNSUAN。

  YINCI,SHOUXIANYAOQIUJIANGSHURUDEMONILIANGDIANLIU、DIANYADESHUNJIANZHIBIANHUANWEILISANDESHUZILIANG,RANHOUCAINENGSONGJISUANJIDEZHONGYANGCHULIQI,ANGUIDINGSUANFAHECHENGXUJINXINGYUNSUAN,QIEJIANGYUNSUANJIEGUOSUISHIYUJIDINGDESHUZIJINXINGBIJIAO,ZUIHOUZUOCHUSHIFOUTIAOZHADEPANDUAN。


大乐透周三走势图  2、LINGXUDIANLIUBAOHUDEGEDUANBAOHUFANWEISHIRUHEHUAFENDE?

  LINGXUDIANLIUIDUANDUOGUOBENXIANLUMODUANJIEDIDUANLULIUJINGBAOHUDEZUIDALINGXUDIANLIUZHENGDING;BUNENGBAOHUXIANLUDEQUANZHANG,DANBUYINGXIAOYUBEIBAOHUXIANLUQUANZHANGDE15%~20%;LINGXUIIDUANYIBANBAOHUXIANLUDEQUANZHANG,BINGYANSHENDAOXIANGLINXIANLUDEIDUANFANWEINEI,BINGYUZHIPEIHE。LINGXUIIIDUANSHII,IIDUANDEHOUBEIDUAN,BINGYUXIANGLINXIANLUPEIHE。

大乐透周三走势图  3、SHENMESHIZHONGHEZHADEHOUJIASU?

  当线路发生故障时,保护按整定值动作,线路开关断开,重合闸马上动作。若是瞬时性故障,在线路开关断开后,故障消失,重合成功,线路恢复供电;若是永久性故障,重合后,保护时间元件被退出,使其变为0秒跳闸,这便是重合闸动作后故障未消失加速跳闸,跳闸切除故障点。

  4、CUOWUCAOZUOGELIKAIGUANHOUYINGRUHECHULI?

大乐透周三走势图  (1)CUOLAGELIKAIGUANSHI,DAOZHAGANGLIKAIJINGCHUTOUBIANFASHENGDIANHU,ZHEISHILIJIHESHANG,JIUKEYIXIAOHU,BIMIANSHIGU,RUODAOZHAYIQUANBULAKAI,ZEBUXUJIANGWULADEDAOZHAZAIHESHANG;

大乐透周三走势图  (2)CUOLAGELIKAIGUANSHI,JISHIHECUO,SHENZHIZAIHEZHASHIFASHENGDIANHU,YEBUZHUNZAILAKAI,YINWEIDAIFUHEDAOZHAHUIZAOCHENGSANXIANGHUGUANGDUANLU。

大乐透周三走势图  5、SHENMEJIAOR、L、CBINGLIANXIEZHEN?

  电阻、电感和电容相并联的电路,在一定频率的正弦电源作用下,出现电路端电压和总电流同相,整个电路呈阻性的特殊状态,这个状态叫并联谐振。

大乐透周三走势图  6、JULIBAOHUDEQIDONGYUANJIANCAIYONGFUXU、LINGXUZENGLIANGYUANJIANYOUHEYOUDIAN?

  (1)LINGMINDUGAO;

大乐透周三走势图  (2)KEJIANZUOZHENDANGBISUOZHUANGZHIDEQIDONGYUANJIAN;

  (3)ZAIDIANYAERCIHUILUDUANXIANSHIBUHUIWUDONG;

  (4)DUICHENGFENLIANGDECHUXIANYUGUZHANGDEXIANGBIEWUGUAN,GUQIDONGYUANJIANKECAIYONGDANGEJIDIANQI,YINCIBIJIAOJIANDAN。

  7、BAOHUZHUANGZHIFUHENAXIETIAOJIANKEPINGDINGWEIYILEISHEBEI?

  YILEISHEBEIDESUOYOUBAOHUZHUANGZHI,QIJISHUZHUANGKUANGLIANGHAO,XINGNENGWANQUANMANZUXITONGANQUANYUNXINGYAOQIU,BINGFUHEYIXIAZHUYAOTIAOJIAN:

  (1)BAOHUPING、JIDIANQI、YUANJIAN、FUSHUSHEBEIJIERCIHUILUWUQUEXIAN;

  (2)ZHUANGZHIDEYUANLI、JIEXIANJIDINGZHIZHENGQUE,FUHEYOUGUANGUIDING、TIAOLIDEGUIDINGJIFANSHIGUCUOSHIQIU;

  (3)TUZHIZILIAOQIQUAN,FUHESHIJI;

  (4)YUNXINGTIAOJIANLIANGHAO。

  8、DUIKONGZHIKAIGUANDEJIANCHAXIANGMUJIQINEIRONGYOUNAXIE?

  DUIKONGZHIKAIGUANDEJIANCHANEIRONGYOU:

  (1)WAIQIAOQINGJIEWUYOUGOU,WANZHENGWUSUN;

  (2)ANZHUANGYINGLAOGU,CAOZUOSHIBUHUODONG;

大乐透周三走势图  (3)MIFENGGAIMIFENGLIANGHAO;

大乐透周三走势图  (4)GEJIEXIANTOULIANJIEYINGLAOGU,BUSONGDONG,BUXIUSHI;

  (5)ZHUANDONGLINGHUO,WEIZHIZHENGQUE,JIECHULIANGHAO;

  (6)DAKAIMIFENGGAI,YONGSHOUDIANTONGZHAOZHEJIANCHA,NEIBUYINGQINGJIE,RUNHUAYOUZHIBUGANZAO,JIECHUDIANWUSHAOSUN。YONGJUEYUANGUNSHIYACHUPIAN,YALIYINGLIANGHAO。

  9、BIANYAQICHADONGBAOHUZAIBIANYAQIKONGZAITOURUSHIMINYINGJIANCHANAXIENEIRONG?

  变压器的差动保护,在新安装时必须将变压器在额定电压下做5次空载试验。在作空载投入之前,应对二次接线进行检查,并确保正确无误。空载投入试验应在变压器的大电源侧和低压侧进行,这是因为系统阻抗及变压器饿漏抗能起限制励磁涌流的作用,而大电源侧系统阻抗小,且一般变压器低压绕组绕在里面,漏抗较小,故在大电源和低压侧投入时涌流较大。在试验中,保护装置一次也不应动作,否则应增大继电器的动作电流。

  10、ZAICHAIDONGERCIXIANSHI,YINGCAIQUNAXIECUOSHI?

  拆动二次线时,必须做好记录;恢复时应记在记录本上注销。二次线改动较多时,应在每个线头上栓牌。拆动或敷设二次电缆时,应还在电缆的首末端及其沿线的转弯处和交叉元件处栓牌

大乐透周三走势图  11、WASIBAOHUDEFANSHIGUCUOSHIYAOQIUSHISHENME?

  (1)JIANGWASIJIDIANQIDEXIAFUTONGGAIDANGBANSHI,JIEDIANGAIWEILISHI,YITIGAOZHONGWASIDONGZUODEKEKAOXING;

大乐透周三走势图  (2)WEIFANGZHIWASIJIDIANQIYINLOUSHUIDUANLU,YINGZAIQIDUANBUHEDIANLANYINXIANDUANZIXIANGNEIDEDUANZISHANGCAIQUFANGYUCUOSHI;

大乐透周三走势图  (3)WASIJIDIANQIYINCHUXIANYINGCAIYONGFANGYOUXIAN;

  (4)EASHIJIDIANQIDEYINCHUXIANHEDIANLANXIANYINGFENBIELIANJIEZAIDIANLANYINXIANDUANZIXIANGNEIDEDUANZISHANG。

大乐透周三走势图  12、BIANYAQIBAOHUZHUANGSHEDEYIBANYUANZESHISHENME?

  (1)FANGYUBIANYAQITIEQIAONEIBUDUANLUHEYOUMIANJIANGDIDEWASIBAOHU;

大乐透周三走势图  (2)FANGYUBIANYAQIXIANQUANJIYINCHUXIANDEXIANGJIANDUANLU,DAJIEDIDIANLIUDIANWANGCEXIANQUANYINCHUCEDEJIEDIDUANLUYIJIXIANQUANZAJIANDUANLUDEZONGLIANCHADONGBAOHUHUODIANLIUSUDUANBAOHU;

  (3)FANGYUBIANYAQIWAIBUDEXIANGJIANDUANLUBINGZUOWASIBAOHUHEZONGLIANCHADONGBAOHUHOUBEIDEGUODIANLIUBAOHU(HUOZHEFUHEDIANYAQIDONGDEGUODIANLIUBAOHU、HUOFUXUDIANLIUBAOHU);

  (4)FANGYUDAJIEDIDIANLIUDIANWANGZHONGWAIBUJIEDIDUANLUDELINGXUDIANLIUBAOHU;

大乐透周三走势图  (5)FANGYUDUICHENGGUOFUHEDEGUOFUHEBAOHU。

大乐透周三走势图  13、JULIBAOHUDEQIDONGYUANJIANYOUSHENMEZUOYONG?

大乐透周三走势图  (1)DUANLUGUZHANGSHI,XUNSUQIDONGBAOHUZHUANGZHI;

  (2)QIDONGZHENDANGBISUOZHUANGZHI,HUOJIANZUODIIIIDUANDECELIANGYUANJIAN;

  (3)JINXINGDUANBIEQIEHUAN;

  (4)JINXINGXIANGBIEQIEHUAN;

大乐透周三走势图  (5)ZAIJINGTIGUANBAOHUZHONG,RUGUOZHILIULUOJIBUFENFASHENGGUZHANG,BISUOZHENGTAOBAOHU。

  14、10QIANFUSHUDIANXIANLUYIBANZHUANGSHESHENMEBAOHU?

  (1)XIANGJIANDUANLUBAOHU:DANDIANYUANXIANLUYIBANZHUANGSHELIANGDUANSHIGUODIANLIUBAOHU,JIDIANLIUSUDUANBAOHU,DINGSHIXIANGUODIANLIUBAOHU;SHUANGDIANYUANXIANLUYIBANZHUANGSHEDAIFANGXIANGHUOBUDAIFANGXIANGDEDIANLIUSUDUBAOHUHEGUODIANLIUSUDUANBAOHU;

  (2)JIEDIBAOHU:YIBANZHUANGSHEWUXUANZEXINGJUEYUANJIANCHABAOHU、LINGXUGUODIANYABAOHU、GONGLVFANGXIANGBAOHU。

大乐透周三走势图  15、FUFANKUIDUIFANGDAQIDEGONGZUOXINGNENGDEYINGXIANGSHISHENME?

大乐透周三走势图  (1)JIANGDIFANGDABEISHU;

  (2)TIGAOFANGDABEISHUDEWENDINGXING;

大乐透周三走势图  (3)GAIJINBOXINGSHIZHEN;

大乐透周三走势图  (4)ZHANKUANTONGPINDAI;

  (5)GAIBIANFANGDAQIDESHURUYUSHUCHUDIANZU。

大乐透周三走势图  16、FEIZHENGXIANDIANLIUCHANSHENGDEYUANYINSHISHENME?

大乐透周三走势图  FEIZHENGXIANDIANLIUDECHANSHENG,KEYISHIDIANYUAN,YEKEYISHIFUZAI。TONGCHANGYOUXIALIEYUANYIN:

大乐透周三走势图  (1)DIANLUZHONGYOUJIGEBUTONGDEZHENGXIANDIANDONGSHITONGSHIZUOYONG,HUOJIAOLIUYUZHILIUDIANDONGSHIGONGTONGZUOYONG;

大乐透周三走势图  (2)DIANLUZHONGJUYOUFEIZHENGXIANZHOUQIDIANDONGSHI;

大乐透周三走势图  (3)DIANLUZHONGYOUFEIXIANXINGYUANJIAN。

  17、6~35kVDIANLIXITONGZHONGDEBILEIQIJIEZAIXIANGDUIDIDIANYASHANG,WEISHENMEBILEIQIYAOANEDINGXIANDIANYAXUANZE?

  6~35kV系统是小接地短路电流系统,在正常情况下,避雷器处于相对地电压的作用下,但发生单相接地故障时,非故障相的对地电压就上升到线电压,而这种接地故障允许段时间内存在,此时避雷器不应动作。所以,避雷器的额定电压必须选用系统的额定线电压而不是额定相电压。

  18、BAOHUZHUANGZHIFUHENAXIETIAOJIANKEPINGDINGWEISHISANLEISHEBEI?

大乐透周三走势图  SANLEISHEBEIDEBAOHUZHUANGZHIHUOSHIPEIBEIBUQUAN,HUOJISHUXINGNENGBULIANG,YINERYINGXIANGXITONGANQUANYUNXING。RUGUO,ZHUYAOBAOHUZHUANGZHIYOUXIALIEQINGKUANGZHIYISHI,YIPINGWEISANLEISHEBEI:

  (1)BAOHUWEIMANZUXITONGYAOQIU,ZAIGUZHANGSHINENGYINQIXITONGZHENDANG,WAJIESHIGUHUOYANZHONGSUNHUAIZHUYAODIANSHEBEIZHE;

  (2)WEIMANZUFANSHIGUCUOSHIYAOQIU;

  (3)GONGYUNXINGRENYUANCAOZUODELIANJIEPIAN、BASHOU、ANNIUDENGSHEYOUBIAOZHI;

  (4)TUZHIBUQUAN,QIEBUFUHESHIJI;

  (5)GUZHANGLUBOQIBUNENGWANHAOLUBOHUOWEITOURUYUNXING。

大乐透周三走势图  19、ZAIDUIJIDIANQISHIYANSHI,RUHEZHANGWOSHIYANHUANJINGTIAOJIAN?

大乐透周三走势图  SHIYANHUANJINGTIAOJIANYAOQIUBAOKUOWENDU、XIANGDUISHIDU、HEQIYASANGEFANGMIAN。ZHEIXIETIAOJIANBUJINYINGXIANGBEISHIJIDIANQIDEJIBENXINGNENG,ERQIEDUICESHIYIQISHEBEIGONGZUOZHUANGTAIYEYOUYINGXIANG。DUISHIYANHUANJINGTIAOJIANYAOQIURUXIA:

  (1)WENDU:15~35DU;

大乐透周三走势图  (2)SHIDU:45~75%;

大乐透周三走势图  (3)QIYA:660~780mmHg;

大乐透周三走势图  20、ZAIXUANZESHIYANYIBIAOSHI,YAOZHANGWONAXIEYUANZE?

大乐透周三走势图  (1)GENJUBEICELIANGDUIXIANGXUANZEYIBIAODELEIXING。SHOUXIANGENJUBEICEJIDIANQISHIZHILIUHAISHIJIAOLIU,XUANYONGZHILIUYIBIAOHUOJIAOLIUYIBIAO;

大乐透周三走势图  (2)GENJUSHIYANXIANLUHEBEICEJIDIANQIXIANQUANZUKANGDEDAXIAOXUANZEYIBIAODENEIZU;

  (3)GENJUBEICEDEDAXIAOXUANYONGSHIDANGDEYIBIAO;

  (4)GENJUSHIYONGDECHANGSUOJIGONGZUOTIAOJIANXUANZEYIBIAO。

  21、XINANZHUANGDEBAOHUZHUANGZHIJUNGONGHOU,QIZHUYAOYANSHOUXIANGMUYOUNAXIE?

  YANSHOUXIANGMURUXIA:

大乐透周三走势图  (1)DIANQISHEBEIJIXIANLUYOUGUANSHICECANSHUWANZHENG、ZHENGQUE;

  (2)QUANBUBAOHUZHUANGZHIJUNGONGTUZHIFUHESHIJI;

大乐透周三走势图  (3)JIANYANDINGZHIFUHEZHENGDINGTONGZHIDANDEYAOQIU;

  (4)JIANYANXIANGMUJIJIEGUOFUHEJIANYANJIANYANTIAOLIHEYOUGUANGUICHENGDEGUIDING;

  (5)HEDUIDIANLIUHUGANQIBIANBIJIFUANTEXING,QIERCIFUZAIMANZUWUCHAYAOQIU;

大乐透周三走势图  (6)JIANCHAPINGQIAN、PINGHOUDESHEBEIZHENGQI,WANHAO,HUILUJUEYUANLIANGHAO,BIAOZHIQIQUANZHENGQUE;

  (7)YONGYICIFUHEDIANLIUHEGONGZUODIANYAJINXINGYANSHOUSHIYAN,PANDUANHUGANQIJIXING,BIANBIJIQIHUILUDEZHENGQUEXING,PANDUANFANGXIANG,CHADONG,JULI,GAOPINDENGBAOHUZHUANGZHIYOUGUANYUANJIANJIJIEXIANDEZHENGQUEXING。

  22、ZAIZHENGCHANGYUNXINGZENYANGJIANYANDAJIEDIDIANLIUXITONGLINGXUFANGXIANGBAOHUDELINGXUDIANYAHUILU?

  为保证零序方向保护正确动作,应对零序方向保护的零序电压回路进行完整性检查。其方法是利用由电压互感器开口三角形接线的二次绕组中引出的试验小母线对供各套零序方向保护的电压小母线YMN测量电压均为100V,即为正常。

大乐透周三走势图  23、ZAIXIAOJIEDIDIANLIUXITONGFUSHEXINGDIANWANGZHONGFASHENGDANXIANGJIEDIGUZHANGSHI,GUZHANGXIANLUYUFEIGUZHANGXIANLUDEDIANLIUYOUHEBUTONG?

  故障线路送端测得零序电容电流,等于其他线路零序电容电流之和,且流向母线。非故障线路送端测得零序电流即为本线路的非故障相对地电容电流,且流出母线。

大乐透周三走势图  24、ZAIDAJIEDIDIANLIUXITONGZHONG,WEISHENMEXIANGJIANBAOHUDONGZUODESHIXIANBILINGXUBAOHUDEDONGZUOSHIXIANZHANG?

  保护的动作时限一般是按阶梯性原则整定的。相间保护的动作时限,是由用户到电源方向每级保护递增一个时限级差构成的,而零序保护则由于降压变压器大都是Y/ 接线,当低压侧接地短路时,高压侧无零序电流,其动作时限不需要与变压器低压用户相配合。所以零序保护的动作时限比相间保护的短。

  25、SHENMESHIDIANLIXITONGZHENDANG?YINQIZHENDANGDEYUANYINYIBANYOUNAXIE?

  并列运行的两个系统或发电厂失去同步的现象称为振荡。引起振荡的原因较多,大多数是由于切除故障时间过长而引起系统动态稳定的破坏,在联系薄弱的系统中也可能由于误操作,发电机失磁或故障跳闸、断工某一线路或设备而造成振荡。

  26、DIAOZHIQIYINGMANZUNAJIXIANGYAOQIU?

大乐透周三走势图  (1)DANGSHURUZHILIUXINHAOUi=0SHI,SHUCHUXINHAOU0=0;

大乐透周三走势图  (2)SHUCHUJIAOLIUXINHAODEFUZHI,YINGBILIYUZHILIUXINHAODEDAXIAO;

  (3)DANGZHILIUXINHAOUiDEJIXINGGAIBIANSHI,SHUCHUJIAOLIUXINHAODEXIANGWEIYESUIZHIGAIBIAN。

  27、35kVZHONGXINGDIANBUJIEDIDIANWANGZHONG,XIANLUXIANGJIANDUANLUBAOHUPEIZHIDEYUANZESHISHENME?

  相间短路保护配置的原则是:


  (1)DANGCAIYONGLIANGXIANGSHIDIANLIUBAOHUSHI,DIANLIUHUGANQIYINGANZHUANGZAIGECHUXIANTONGMINGLIANGXIANGSHANG(LIRUA,CXIANG);

大乐透周三走势图  (2)BAOHUZHUANGZHIBAOHUZHUANGZHIYINGCAIYONGYUANHOUBEIFANGSHI;

  (3)RUXIANLUDUANLUHUISHIFADIANCHANGCHANGYONGMUXIAN、ZHUYAODIANYUANDELIANLUODIANMUXIANHUOZHONGYAOYONGHUMUXIANDEDIANYADIYUEDINGDIANYADE50%~60%SHIYINGKUAISUQIECHUGUZHANG。

大乐透周三走势图  28、ZAIGAOYADIANWANGZHONG,GAOPINBAOHUDEZUOYONGSHISHENME?

  高频保护作用在远距离高压输电线路上,对被保护线路任一点各类故障均能瞬时由两侧切除,从而能提高电力系统运行的稳定性和重合闸的成功率。

  29、DAJIEDIDIANLIUXITONGZHONG,WEISHENMEXIANGJIANBAOHUDONGZUODESHIXIANBILINGXUBAOHUDEDONGZUOSHIXIANZHANG?

  保护的动作时限一般是按阶梯性原则整定的。相间保护的动作时限是由用户到电源方向每级保护递增一个时限差构成的,而零序保护则由于降压变压器大都是Y,d11接线,当低压侧接地短路时,高压侧无零序电流,其动作时限不需要与变压器低压用户配合。所以零序保护的动作时限比相间保护的短。

  30、DUIYUNSUANFANGDAQIDEJIBENYAOQIUSHISHENME?

  (1)SHURUDUANWAIJIEZUKANGYUFANKUIDIANLUZUKANGSHUZHIYINGJINGQUE、WENDING;

  (2)KAIHUANDIANYAFANGDABEISHUYINGZUGOUDA;

  (3)KAIHUANSHURUDIANZUr i YAOZUGOUDA;

  (4)KAIHUANSHUCHUDIANZUYAOXIAO;

  (5)LINGDIANPIAOYIHEZAOSHENGYAOXIAO。

  31、SHENMESHIFANGDAQISHUCHUDIANZU?

  在放大器输出端,可以把放大器看作具有一定内阻的信号源,这个内阻就是输出电阻。

大乐透周三走势图  32、SHIYONGDIEJIAYUANLIJISUANXIANXINGDIANLUYINGZHUYINAXIANGSHIXIANG?

大乐透周三走势图  YINGYONGDIEJIAYUANLIKEYIFENBIEJISUANGEGEDIANYAYUANHEDIANLIUYUANDANDUZUOYONGXIAGEZHILUDEDIANYAHEDIANLIU,RANHOUDIEJIAYUANLIJIAQILAI,ZAIYINGYONGDIEJIAYUANLISHIYINGZHUYI:

大乐透周三走势图  (1)GAIYUANLIZHINENGYONGLAIJISUANXIANXINGDIANLIUHEDIANYA,DUIFEIXIANXINGDIANLUBUSHIYONG;

  (2)JINXINGDIEJIASHIYAOZHUYIDIANLIUHEDIANYADEFANGXIANG,DIEJIASHIQUDAISHUHE;

  (3)DIANLULIANJIEFANGSHIJIDIANLUZHONGDEGEDIANZUDEDAXIAODOUBUNENGBIANDONG。DIANLIUYUANZUOYONGSHI,DIANYAYUANDUANLU,DIANYAYUANZUOYONGSHI,DIANLIUYUANKAILU;

  (4)DIEJIAYUANLIZHISHIYONGYUDUIDIANYAHEDIANLIUDEDIEJIA,ERGONGLVBUNENGYONGDIEJIAYUANLILAIJISUAN。

大乐透周三走势图  33、SHUILUNFADIANJIWEISHENMEYAOSHEZHIGUODIANYABAOHU?

  由于水轮机调速系统调节缓慢,在事故甩负荷后,容易出现不饮许的过电压,所以规定要设置过电压保护。

  34、SHENMEJIAOFADIANJIDILIJIFADIANJISHICI?

  低励是表示发电机励磁电流低于静稳定极限所对应的励磁电流。失磁是指发电机失去励磁电流。

  35、WEISHENMEFADIANJIYAOZHUANGSHEFUHEDIANYAQIDONGDEGUODIANLIUBAOHU?WEISHENMEZHEIZHONGBAOHUYAOSHIYONGFADIANJIZHONGXINGDIANCHUDEDIANLIUHUGANQI?

  ZHEISHIWEILEZUOWEIFADIANJICHADONGBAOHUHUOXIAYIGEYUANJIANDEHOUBEIBAOHUERSHEZHIDE,DANGCHUXIANXIALIELIANGGUZHANGSHIQIZUOYONG:

大乐透周三走势图  (1)DANGWAIBUDUANLU,GUZHANGYUANJIANDEBAOHUZHUANGZHIHUOJIDIANQIJUJUEDONGZUOSHI;

  (2)ZAIFADIANJICHADONGBAOHUFANWEINEIGUZHANGERCHADONGBAOHUJUJUEDONGZUOSHI。

大乐透周三走势图  36、BIANYAQIFUHEDIANYAQIDONGGUODIANLIUBAOHUDEFUXUDIANYADINGZHIYIBANANSHENMEYUANZEZHENGDINGDE?WEISHENME?

  系统正常运行时,三相电压基本上是正序分量,负序分量很小,故负序电压元件的定值按正常运行时负序电压滤过器的输出不平衡电压整定,一般去6~12V(二次电压值)

大乐透周三走势图  37、WEISHENMEYOUXIEDARONGLIANGDEBIANYAQIJIXITONGLIANLUOBIANYAQIYONGFUXUDIANLIUHEDANXIANGSHIDIYAQIDONGDEGUODIANLIUBAOHUZUOWEIHOUBEIBAOHU?

  YINWEIZHEIZHONGBAOHUJUYOURUXIAYOUDIAN:

大乐透周三走势图  (1)ZAIFASHENGBUDUICHENGDUANLUSHI,QILINGMINDUGAO;

大乐透周三走势图  (2)ZAIBIANYAQIHOUFASHENGBUDUICHENGDUANLUSHI,QILINGMINDUYUBIANYAQIDEJIEXIANFANGSHIWUGUAN。

  38、ZHONGJIANJIDIANQIZAIJIDIANBAOHUZHONGQIHEZUOYONG?

  (1)BAOHUZHUANGZHIZHONGDECELIANGYUANJIANDECHUDIANYIBANHENXIAO,SHULIANGYESHAO,TONGGUOZHONGJIANJIDIANQIKEZENGJIACHUDIANRONGLIANGHESHULIANG;

大乐透周三走势图  (2)DANGXIANLUSHANGZHUANGYOUGUANXINGBILEIQISHI,LIYONGZHONGJIANJIDIANQIKEQUDEBAOHUZHUANGZHIDONGZUODEYANSHI,YIFANGBILEIQIFANGDIANSHIYINQIDESUDONGBAOHUWUDONGZUO;

  (3)MANZUBAOHULUOJIHUILUDEXUYAO。

  39、DIANCIXINGDIANLIUJIDIANQIYUDIANYAJIDIANQIGONGZUOTIAOJIANYOUSHENMEQUBIE?

  电压继电器一般接于电压互感器二次侧,与电流互感器相比较,由于电压高,所以继电器线圈匝数多、导线细、阻抗大,且线圈的电抗增大,以至电流减小;另一方面使磁路磁抗减小,而电流的减小和阻抗的减小互相补偿,使继电器在动作过程中电磁力矩不变,失去继电特性。

大乐透周三走势图  40、WEIHESHUOJULIBAOHUDEBAOHUQUJIBENBUSHOUXITONGYUNXINGFANGBIANHUADEYINGXIANG?

  YINWEIJULIBAOHUSHILIYONGXIANLUDESHIDUANDIANYAYUDIANLIUDEBIZHIZUOWEIPANJUGOUCHENGBAOHU,YOUYUDUANLUZUKANGZHISUIDUANLUDIANJUXIANLUSHIDUANDEYUANJINERBIANHUA,GUBAOHUDEBAOHUQUJIBENBUSHOUXITONGDEYUNXINGFANGSHIBIANHUADEYINGXIANG。



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关键词:配电柜电箱,电气自动化系统

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