Iindaba - Yintoni i-PT/CT?

PTiqhele ukubizwa ngokuba yi-voltage transformer kushishino lwamandla kwaye i-CT ligama eliqhelekileyo le-transformer yangoku kwishishini lamandla.

Isiguquli samandla ombane (i-PT): sisixhobo sombane esitshintsha amandla ombane aphezulu enkqubo yamandla ukuya kumbane oqhelekileyo osezantsi (100V okanye 100 / √ 3V).

I-transformer enokwenzeka (PT, VT) ifana ne-transformer, esetyenziselwa ukutshintsha i-voltage kumgca.Nangona kunjalo, injongo yokuba kutheni i-transformer iguqula amandla ombane kukuhambisa amandla ombane.Umthamo mkhulu kakhulu, jikelele kwi kilovolt ampere okanye megavolt ampere njengeyunithi yokubala.Injongo yokuba kutheni i-voltage transformer iguqula i-voltage isetyenziselwa ukulinganisa iimitha kunye nonikezelo lwamandla ngezixhobo zokukhusela i-relay, ukulinganisa amandla ombane, amandla kunye namandla ombane ombane, okanye ukukhusela izixhobo ezixabisekileyo kumgca xa umgca usilela ke ngoko, amandla I-voltage transformer incinci kakhulu, ngokubanzi kuphela i-volt ampere ezimbalwa, ii-volt ampere ezininzi, kwaye ubuninzi abukho ngaphezu kwewaka le-volt ampere.

I-transformer yangoku (CT): sisixhobo sombane esitshintsha amandla akhoyo kwindlela yamandla ombane aphezulu okanye umsinga omkhulu okhoyo kwisixokelelwano samandla ombane asezantsi sibe ngumgangatho othile wangoku omncinci (5a okanye 1a).

I-transformer yangoku sisixhobo esiguqula umsinga omkhulu kwicala laseprayimari ukuya kwincinci yangoku kwicala lesibini ngokomgaqo wokungeniswa kwe-electromagnetic.I-transformer yangoku iqulunqwe ngundoqo evaliweyo kunye ne-winding.Ukujika kwayo okuphambili okujikelezayo kuncinci kakhulu, kwaye idibaniswe kuchungechunge kwisekethe efuna ukulinganisa okwangoku.Ngoko ke, ihlala inawo onke angoku ahambayo kumgca, kwaye ukujika kwesibini okujikelezayo kuninzi.Idibaniswe kwichungechunge kwisixhobo sokulinganisa kunye nesiphaluka sokukhusela.Xa i-transformer yangoku isebenza, isiphaluka sayo sesibini sihlala sivaliwe, ngoko i-impedance ye-coil yochungechunge lwesixhobo sokulinganisa kunye nesekethe yokukhusela incinci kakhulu, kwaye imo yokusebenza ye-transformer yangoku isondele kwisiphaluka esifutshane.I-transformer yangoku iguqula i-current enkulu kwicala eliphambili kwi-current encinci kwinqanaba lesibini lokulinganisa, kwaye icala lesibini alikwazi ukuvulwa isiphaluka.