Tam sim no transformer (CT) test

Cov no yog ib co ntawm cov kev ntsuam xyuas yooj yim ua ntawm ib tug tam sim no transformer. Nws yog ib qho tseem ceeb kom nco ntsoov tias cov txheej txheem tshwj xeeb thiab cov qauv yuav txawv nyob ntawm daim ntawv thov thiab cov cai hauv zos. Cov neeg ua haujlwm tsim nyog uas muaj kev txawj ntse hauv kev ntsuas hluav taws xob thiab kev nyab xeeb yuav tsum ua cov kev sim no.

1. Kev tshuaj xyuas qhov muag: Pib los ntawm kev kuaj pom qhov hloov pauv tam sim no rau cov cim qhia ntawm kev puas tsuaj lossis hnav. Tshawb xyuas cov kev sib txuas xoob, tawg, lossis lwm yam teeb meem pom uas yuav cuam tshuam rau nws txoj haujlwm.

2. CT ratio test: CT ratio test yog ua los xyuas seb qhov kev hloov pauv ntawm CT sib npaug li qhov piv txwv. Ib qho kev paub AC tam sim no tau dhau los ntawm thawj winding, thiab qhov thib ob winding txuas nrog lub ntsuas tam sim no. Qhov piv ntawm thawj tam sim no mus rau theem nrab tam sim no yog muab piv rau qhov ntsuas piv ntawm CT.

3. Polarity test: Lub polarity ntawm CT yog hais txog cov kev taw qhia ntawm tam sim no nyob rau hauv lub thib ob winding txheeb ze rau thawj winding. Qhov kev ntsuam xyuas polarity kom ntseeg tau tias tam sim no ntws mus rau qhov tseeb. Ib qho hluav taws xob DC tsawg-voltage yog txuas nrog lub hauv paus winding, thiab cov kev taw qhia ntawm qhov tshwm sim DC voltage hla qhov thib ob winding raug kuaj xyuas.

4. Kev ntsuas lub nra hnyav: Kev ntsuas lub nra hnyav tau ua kom ntseeg tau tias CT tuaj yeem ntsuas qhov ntsuas tam sim no raws li nws cov xwm txheej load. Lub calibrated tam sim no qhov chaw txuas nrog lub hauv paus winding, thiab lub thib ob winding yog txuas nrog lub nra resistor los yog ib qho cuab yeej. Qhov tam sim no qhia los ntawm qhov ntsuas tau muab piv rau qhov paub tus nqi ntawm qhov tam sim no.

5. Kev ntsuas kev tiv thaiv kev tiv thaiv hluav taws xob: Qhov kev ntsuam xyuas no kuaj xyuas qhov kev ruaj ntseg ntawm CT. Lub qhov hluav taws xob siab DC yog siv nruab nrab ntawm thawj winding thiab CT core, thaum lub thib ob winding yog qhib. Lub rwb thaiv tsev tiv thaiv yog ntsuas los xyuas kom meej tias nws ua tau raws li cov qauv xav tau.

6. saturation test: Qhov kev ntsuam xyuas saturation txiav txim siab qhov taw tes uas CT saturates thiab tsis tuaj yeem muab qhov ntsuas qhov tseeb ntxiv lawm. Kev nce AC tam sim no yog dhau los ntawm thawj winding thaum saib xyuas cov tam sim no thib ob. Lub ntsiab lus ntawm qhov thib ob tam sim no tsis nce linearly nrog cov thawj tam sim no tau sau tseg.