Nzira yekuziva sei polarity yezvino transformer?

Current transformer (CT) chinhu chakakosha chemagetsi mugadziriro yemagetsi.Inoita basa rekuzviparadzanisa pakati pepamusoro uye yakaderera voltage masisitimu uye kushandura yakakwira voltage kusvika yakaderera voltage.Kunyangwe iyo wiring yakarurama kana kwete yakakosha zvikuru kune yakajairika mashandiro ekudzivirira, kuyerwa, metering uye zvimwe zvishandiso zvehurongwa.Kana CT itsva yaiswa uye CT yechipiri tambo yaiswa mukushanda kana kutsiviwa, kuyera kurongeka kweCT polarity yatove nzira yakakosha yebasa revashandi vekuchengetedza relay.Tevere, HV Hipot inosuma iyo CT polarity kuyerwa zvakadzama:

                                                               HV Hipot GDHG-201A transformer yakazara CT/ PT hunhu bvunzo

1. Chii chinonzi polarity yeCT?

Iyo polarity isimba remagetsi rinokonzerwa neiyo yekutanga coil uye yechipiri coil pasi pechiito cheiyo magineti flux yesimbi core.Migumo miviri inosvika pakukwanisa kwepamusoro panguva imwe chete kana kuguma iyo inenge yakaderera pane imwe nguva inonzi yakafanana polarity end.

Iyo inonzi current transformer (CT) polarity inoreva hukama huripo pakati penzira yazvino pakati pekupeta kwayo kwekutanga uye mhepo yechipiri.Zvinoenderana nemirairo, yekutanga kupera kweCT primary winding yakanyorwa seP1, uye muswe wekupedzisira wakanyorwa seP2;iyo musoro wekupedzisira wechipiri mhepo inotenderedzwa yakanyorwa seS1, uye muswe wekupedzisira wakanyorwa seS2.Mune wiring, P1 uye S1, P2 uye S2 inonzi yakafanana polarity end.Tichifunga kuti I1 yazvino yemhepo yekutanga inoyerera ichipinda kubva kumusoro wekupedzisira P1 uye ichiyerera ichibuda kubva kumuswe wekupedzisira P2, iyo induced ikozvino I2 mune yechipiri mhepo inoyerera inoyerera ichibva kumusoro S1 uye inoyerera ichipinda kubva kumuswe wekupedzisira S2.Panguva ino, iyo magineti inoyerera inogadzirwa musimbi core Munzira imwe chete, yakadai CT polarity sign inonzi depolarization.Pane kudaro, inonzi kuwedzera polarity.Inowanzo shandiswa ikozvino kushandura, kunze kwekunge yatsanangurwa neimwe nzira, shandisa depolarization.

2. Sei kuyera polarity yeCT?

Iyo polarity yeazvino transformer inofanirwa kuongororwa isati yasvika uye mushure mekupa uye kugadzirisa.Uye zvakare, kana iyo yekusiyanisa kuchengetedzwa mukushanda, iyo simba kutungamira kuchengetedza kusashanda kana watt-awa mita yakadzoserwa, iyo polarity yeCT inofanirwawo kuongororwa.Imhaka yekuti kana iyo polarity yeazvino transformer yakabatana zvisizvo panguva ye wiring, njodzi dzinotevera dzichaitika:

(1) Kana iyo yazvino transformer ikashandiswa munharaunda yekudzivirira relay, ichaita kuti chidziviriro chekudzivirira chisashande kana kuramba kushanda, uye panguva imwe chete, chinokanganisa kutariswa kwekushanda uye kubata njodzi kwesimba remagetsi, uye kunyange kuisa pangozi midziyo uye kuchengeteka kwemunhu mumamiriro ezvinhu akaoma.

(2) Kana shanduko yemazuva ano ichishandiswa muchiyero chekuyera dunhu, ichaita kuti chiratidziro chezviridzwa zvakasiyana-siyana nemamita uye kuyerwa kwesimba remagetsi kusina kururama.

(3) Kana shanduko yemazuva ano ine nyeredzi isina kukwana yekubatanidza inoshandiswa, kana polarity yeimwe chikamu ichidzoserwa, ikozvino kwechikamu chimwe chete (kazhinji chikamu chepakati) cheshanduro isina kubatanidzwa yemazuva ano ichave yakapetwa kakawanda kupfuura yezvimwe zvikamu.

(4) Kana shanduri yemazuva ano ine nyeredzi isina kukwana yakashandiswa, kana zvikamu zviviri zvakadzoserwa, kunyange zvazvo matatu-phase ikozvino padivi rechipiri inogona kuramba yakagadzikana, chikamu chekona yakasiyana neinofananidzwa nechikamu chekutanga chiri 180 °, saka izvo zvinozodzosera kumashure mita.

Nokudaro, ibasa rakakosha zvikuru kutonga zvakarurama kana polarity yezvino transformer yakarurama kana kwete.