Transformers hadda (CT-yada) ayaa ah qaybo muhiim u ah ilaalinta iyo la socodka nidaamka tamarta. Waxay mas'uul ka yihiin bixinta saamiga hadda jira ee soo-celinta ilaalinta, taasoo suurtogal ka dhigaysa in la ogaado cillad kasta ama cillad kasta oo ku jirta nidaamka korontada. Si kastaba ha ahaatee, saxnaanta CT-yada ayaa muhiim ah si loo xaqiijiyo hawlgalka saxda ah ee gudbinta ilaalinta.
Saxnimada CT-ga waxaa lagu go'aamiyaa heerka saxda ah ee la shahaadiyey kaas oo ku shaabadeeyey saxanka magaca. tusaale ahaan, fasalka saxnaanta CT ee 0.3 macnaheedu waa in CT yahay
la cadeyay in uu sax yahay 0.3% ee qiimaheeda saamiga lagu qiimeeyay ee hadda 100% ee saamiga la qiimeeyay.
CT oo leh saamiga la qiimeeyay ee 200/5 oo leh heerka saxda ah ee 0.3 ayaa ku shaqayn doona 0.45% qiimihiisa saamiga lagu qiimeeyay wakhtiga xaadirka ah
100 amps ie marka loo eego wakhtiga aasaasiga ah ee 100A waxa la cadeyay in uu soo saaro hadda sare oo u dhexeeya 2.489 amps iyo 2.511 amps.
Saxnimada waxaa lagu qeexaa sida % da'da baaxadda waxaana lagu bixiyaa culeyska ugu badan sida lagu muujiyey VA. Culayska wadarta waxaa ka mid ah iska caabinta mitirka iyo caabbinta wareegga ee fiilada iyo isku xirka CT iyo mitirka. Tusaale: Culays=2.0 VA. Dhibicda ugu badan ee Voltage=2.0 VA / 5 Amps{6}} Volts.
Iska caabinta ugu badan=Voltage / Hadda=04.00 Volts / 5 Amps=0.080 Ohms.
Haddii caabbinta mitirku yahay 0.010Ω, markaa 0.070Ω ayaa loo oggol yahay caabbinta loop ee fiilada, iyo isku xirka CT iyo mitirka.
Waa lagama maarmaan in la xasuusto in saxnaanta CT-yada ay saameyn ku yeelan karaan dhowr arrimood, sida heerkulka CT-ga, inta jeer ee hadda jira, iyo tayada dahaarka hore ee dabaysha. Sidaa darteed, hagaajinta joogtada ah iyo dayactirka CT-yada ayaa lagama maarmaan u ah si loo hubiyo saxnimadooda.