A qhuav -hom grounding transformeryog nyob rau hauv lub rooj sib txoos zaum kawg. Qhov no grounding transformer yog dav siv nyob rau hauv lub teb chaws.
Dab tsi yog grounding transformer:
Lub hauv paus transformer lossis grounding transformer yog ib qho khoom siv hluav taws xob siv nyob rau hauv peb -theem fais fab tshuab los muab txoj hauv kev rau hauv av rau ungrounded ib -txoj kev los yog delta-txoj kev txuas. Grounding transformer yog ib feem tseem ceeb ntawm lub hwj chim grid grounding system. Lawv tso cai rau peb -theem (delta- txuas) tshuab kom haum rau theem- nruab nrab loads los ntawm kev muab txoj hauv kev rau tam sim no rov qab mus rau qhov nruab nrab.
Grounding transformers feem ntau yog siv rau:
Muab cov impedance hauv av uas tsis tshua muaj hluav taws xob kom qhov nruab nrab ntawm qhov system nyob ntawm lossis ze rau hauv av muaj peev xwm
Thaum muaj qhov txhaum hauv av dua, qhov loj ntawm qhov hloov pauv hloov pauv yuav tsum raug txwv.
Thaum muaj ib txoj kab - mus rau - av txhaum, av txhaum tam sim no yog muab.
Tso cai rau theem- nruab nrab load txuas yog tias xav tau
Zigzag grounding transformer
Qhov feem ntau siv hauv av transformer yog ib qho -winding transformer nrog zigzag winding configuration, tab sis koj tuaj yeem tsim ib lub delta -winding transformer. Neutral grounding transformers muaj ntau heev ntawm cov tshuab hluav taws xob hauv fais fab nroj tsuag thiab cua ua liaj ua teb. Nruab nrab grounding transformers yog qee zaum siv nyob rau hauv high voltage (secondary kis tau tus mob), xws li 33kv, qhov twg lub Circuit Court yuav tsis pub lwm yam grounded; Piv txwv li, yog hais tias lub kaw lus yog powered los ntawm ib tug delta - txuas transformer. Lub hauv paus ntsiab lus ntawm lub transformer tuaj yeem txuas nrog los ntawm cov resistor lossis arc suppression coil los txwv qhov txhaum tam sim no ntawm lub kaw lus thaum muaj kab - mus rau - hauv av txhaum.