Amandla okukhipha angempela amabhethri abesebenza ngaphansi kwezimo zokushaja okuntantayo isikhathi eside awavamile ukungaqondakali. Ukuthembela kuphela ezindleleni ezivamile zokuhlola umthamo kunikeza ukunemba okulinganiselwe. Nakuba izinguquko ku-voltage yebhethri nokumelana kwangaphakathi zingabonisa kancane ukuwohloka komthamo, le mingcele ayiwona amamethrikhi aqondile okulinganisa umthamo webhethri.
Isixazululo esithembekile kuphela ukwenza ukuhlolwa kwamandla ngezikhathi ezithile ngemijikelezo elawulwayo yokukhipha imali. Lokhu kuqinisekisa ukuthi amabhethri asebenza ngokungekho ngaphansi kuka-80% womthamo wawo, ahlangabezana nezidingo zokulayishwa kwe-DC ngesikhathi sokuphela kukagesi we-AC nokuhlonza izinkinga zebhethri ezingaba khona. Lokhu kuyisici esibalulekile sokuthembeka kwesistimu yamandla e-DC.
Isixazululo Sokuhlola Umthamo Webhethri Lebhange le-DFUN sihlanganisa imisebenzi eminingi, okuhlanganisa ukuqapha okukude ku-inthanethi, ukuhlola ukukhishwa kwamandla, ukushaja okuhlakaniphile okuhlukaniswe ngezigaba, ukusebenza nokugcinwa kwebhethri okuhlakaniphile, ukulinganisa ibhethri nokwenziwa kusebenze. Ilungele amasistimu kagesi e-DC njengamandla kagesi we-telecom (48V) kanye nezinto ezisetshenziswayo zikagesi (110 & 220V).
Yakhela phezu kweminyaka yobungcweti nokusetshenziswa kwezinhlelo zamandla kagesi e-DC, i-DFUN ithuthukise izinhlelo zesikhathi sangempela zokuhlola umthamo webhethri ku-inthanethi. Ukuqamba okusha okubalulekile ukwethulwa kwe-Discharge Protection Unit, okuvumela ukuhlolwa kwamandla ukuthi kwenziwe ngaphansi kwezimo ezivikelekile.
Iyunithi yokuvikela ukukhishwa iqukethe i-unidirectional diode kanye nesixhumi esivamise ukuvaleka esixhunywe ngokuhambisana bese sishuthekwa kusekethe yebhethri. Ngesikhathi sokuhlolwa kwamandla, i-diode iqinisekisa ukuthi ukushaja kuyayeka ngenkathi ukushajwa kuqhubeka. Lokhu kuvimbela idivayisi eshajayo ekunikezeni amandla ebhange lebhethri, kubeka ibhange ibhethri esimweni sokulinda esishisayo (isikhathi sangempela ku-inthanethi). Ngaphandle kokubheka isimo sokusebenza sohlelo lokuhlola umthamo, ibhange lebhethri lihlala liku-inthanethi. Esimeni lapho kwehluleka kudivayisi yokushaja noma kusistimu ye-AC, ibhange lebhethri linikeza amandla khona manjalo ekulayisheni kwe-DC.
Isistimu Yokuhlola Ikhono Elikude Le-inthanethi Yezinsiza Zamandla Ze-Telecom (48V)
Uhlelo Lokuhlola Ikhono Le-inthanethi Elikude Lokuhlinzeka Ngamandla Okusebenza (110V & 220V)
I-K1 ihlala ivaliwe, ixhuma ibhange lebhethri ne-DC ibhasi/isisetshenziswa sokushaja.
Ibhange lebhethri lingashaja futhi likhiphe. Uma isistimu ye-AC/idivayisi yokushaja ihluleka, ibhange lebhethri linikeza amandla esikhathi sangempela ekulayisheni kwe-DC.
I-Telecom Power Supplies (48V)
I-K1 Ivuliwe, I-KM Ivaliwe: Ibhethri liphuma ngeyunithi yokukhipha i-DC/DC step-up bese ixhuma ebhasini le-DC. Phakathi nalesi simo, i-voltage ephumayo yohlelo lokuhlola umthamo ingaphezu kwamandla kagesi we-DC, iqinisekisa ukuthi umthwalo unikwa amandla uhlelo lokuhlola umthamo (ibhange lebhethri). Isekethe ye-diode (D1) iyeka ukushaja, ivumela ukukhulula.
Ukunikezwa kwamandla okusebenza (110V & 220V)
I-K1 Vula, i-K11 Ivaliwe: Ibhange lebhethri liphuma ngesiguquli se-PCS, libuyisela amandla kugridi ye-AC. Isekethe ye-diode (D1) iyeka ukushaja, ivumela ukukhulula.
Kuzo zombili izinhlobo zamasistimu, iyunithi yokuvikela ukukhishwa (K/D) iqinisekisa ukuthi noma kwenzeka amaphutha kusistimu ye-AC, idivayisi yokushaja, noma uhlelo lokuhlola umthamo, ibhange lebhethri lihlala likwazi ukuhlinzeka amandla esikhathi sangempela kumthwalo we-DC. Lokhu kusabela ngokushesha kwenelisa izimfuno zamandla ezimo eziphuthumayo ezimweni ezimbi kakhulu.
Ngokuhlanganisa iyunithi yokuvikela ukukhishwa (K/D) kusekethi yokunikezwa kwebhethri, isistimu iqinisekisa ukuhlinzekwa kwamandla okungaphazamiseki avela ebhange lebhethri phakathi nokuhlolwa kokukhishwa kwamandla ngezikhathi ezithile. Lokhu kuthuthukisa ukuphepha nokuthembeka kwezinhlelo zamandla e-DC, okuhlinzeka ngokuvikeleka okuqinile kwemisebenzi ebalulekile.
