Txhawm rau ua qhov kwv yees yav tom ntej luv luv Circuit Court tam sim no ntawm lub transformer thiab txiav txim siab nws impedance thiab poob.
Obviously luv luv cov zis nrog lub hauv paus energized nrog nws tag nrho cov khoom voltage yuav tsim ib tug ntau ntawm cov foob pob hluav taws, puas los yog ua puas lub kim transformer. Yog li txhawm rau txiav txim siab qhov tseeb no lawv luv luv cov zis terminals thiab ua kom cov thawj voltage kom txog rau thaum lub thib ob tam sim no nyob rau ntawm nws tag nrho load peev xwm. Cia peb hais qhov no yog 1200 Amps. Lub transformer yuav khiav tsis tu ncua ntawm qhov tam sim no. Lub impedance yog muab raws li qhov feem pua ntawm thawj qhov hluav taws xob ua rau FLC nyob rau hauv qhov thib ob piv rau qhov qub thawj energized voltage. Yog li yog tias nyob rau ntawm 4% ntawm qhov qub thawj qhov hluav taws xob ua rau tag nrho cov khoom muaj peev xwm tam sim no hauv theem nrab ces qhov impedance yog 4%.
Tam sim no 4% yog 1/25th ntawm qhov qub thawj qhov hluav taws xob qhov tam sim no luv luv Circuit Court tam sim no yuav yog 25 Sijhawm rau tag nrho cov khoom thauj khoom nruab nrab tam sim no tau txais thaum lub sijhawm kuaj yog li Prospective Short circuit Current (PSC)=25 x 1200 Amps {{6} }, 000 Amps 30KA.
Qhov no yog KA (30KA) kev ntsuam xyuas uas cov khoom siv tiv thaiv theem nrab, cables, busbars thiab hloov iav yuav tsum muaj peev xwm ua tau yam tsis muaj kev puas tsuaj.
