Mumitsara yekugadzira magetsi, shanduko, kuendesa, kugovera, uye kushandiswa kwemagetsi, mafungu anosiyana zvakanyanya, kubva paamperes mashoma kusvika kumakumi ezviuru zveamperes. Kuti ifambise kuyerwa, kudzivirira uye kutonga, inoda kushandurwa kuita inofanana ikozvino. Pamusoro pezvo, magetsi ari pamutsetse anowanzo kukwira, senge kuyerwa kwakananga kune njodzi. Ikozvino transformer inobata basa rekushandura ikozvino uye kuparadzaniswa kwemagetsi.
Kune pointer-mhando ammeters, iyo yechipiri ikozvino yeazvino transformer inowanzoita ampere-level (senge 5A, nezvimwewo). Kune zviridzwa zvedhijitari, chiratidzo chesampled chinowanzoita milliampere (0-5V, 4-20mA, nezvimwewo). Yechipiri yazvino yeiyo miniature yazvino transformer ndeye milliampere, uye inonyanya kushanda sebhiriji pakati peiyo huru transformer uye sampling.
Miniature ikozvino transformers inonziwo "instrument current transformers". (Iyo "chiridzwa chazvino shanduri" ine chirevo chekuti iyo yakawanda-yazvino chiyero chaiyo inoshandura shanduko inoshandiswa murabhoritari inowanzo shandiswa kuwedzera huwandu hwechiridzwa.)
Ikozvino transformer yakafanana neshanduko uye inoshandawo zvinoenderana nemusimboti we electromagnetic induction. Iyo transformer inoshandura voltage uye ikozvino transformer inoshandura ikozvino. Mhepo yeshanduko yemazuva ano yakabatana kune yakayerwa ikozvino (nhamba yekutendeuka ndiN1) inonzi yekutanga mhepo (kana yekutanga mhepo, yekutanga mhepo); mhepo inomonereka (nhamba yekutendeuka ndiN2) yakabatana kune yekuyeresa chiridzwa inonzi yechipiri mhepo (kana yechipiri mhepo) Winding, yechipiri mhepo).
Chiyero chemazuva ano pakati pekutanga mhepo inovhuvhuta ikozvino I1 yezvino transformer uye yechipiri mhepo I2 inonzi iyo chaiyo ikozvino chiyero K. Ikozvino chiyero cheshanduro yemazuva ano kana ichishanda pane yakarongwa ikozvino inonzi ikozvino transformer rated current ratio, iyo inomiririrwa naKn.
Kn=I1n/I2n
Basa reshanduko yemazuva ano (CT) ndeyekushandura ikozvino yekutanga ine kukosha kwakakura kuita yechipiri ikozvino ine diki kukosha kuburikidza neimwe shanduko reshiyo yekudzivirira, kuyerwa uye zvimwe zvinangwa. Semuenzaniso, shanduko yemazuva ano ine shanduko ye400/5 inogona kushandura ikozvino chaiyo ye400A kuita ikozvino ye5A.
Nguva yekutumira: Zvita-17-2021