A Neutral Grounding Resistor (NGR) ke karolo ea bohlokoa lits'ebetsong tsa matla a motlakase, haholo mererong ea li-transformer, moo e thusang ho ntlafatsa polokeho le ts'epo. NGR e lekanyetsa boholo ba maqhubu a phoso ha ho e-na le phoso ea fatše, kahoo e sireletsa transformer le lisebelisoa tse amanang le tsona. Ho utloisisa ts'ebetso ea NGR ho bohlokoa bakeng sa liindasteri tse itšetlehileng ka li-transformer bakeng sa lisebelisoa tsa tsona tsa ho tsamaisa motlakase.
Mesebetsi ea Bohlokoa ea NGR ho Transformer Systems:
1.Ho Lekanya Phoso ea Hona Joale
Litsamaisong tsa motlakase, liphoso tsa fatše (lipotoloho tse khutšoane ho isa fatše) ke tse ling tsa liphoso tse atileng haholo. Ntle le ho beha fatše, phoso ea fatše e ka lebisa ho maqhubu a kotsi a phahameng a kotsi, ho beha kotsi ea tšenyo ea lisebelisoa le ho baka likotsi ho basebetsi.
NGR e hokahane pakeng tsa ntlha e sa nke lehlakore ea transformer le lefats'e. Mosebetsi oa eona o ka sehloohong ke ho fokotsa hona joale ho phallang tsamaisong nakong ea phoso ea fatše ho ea boemong bo sireletsehileng le bo laolehang. Ka mohlala, haeba phoso ea mola ho ea fatše e etsahala, NGR e thibela ho phalla hona joale, ho sireletsa likarolo tse peli tsa transformer le tlaase.
2.Ho Thibela Tšenyo ea Lisebelisoa
Maqhubu a sa laoleheng a phoso a ka fella ka ho futhumala ho feteletseng, ho senyeha ha insulation, esita le ho hlōleha ho kotsi ha li-transformer le likarolo tse ling tsa motlakase. Ka ho laola phoso ea hona joale, NGR e fokotsa khatello ea kelello tsamaisong, ho thibela tšenyo ea thepa.
Sena se bohlokoa haholo lits'ebetsong tsa matla a mahareng ho isa ho a phahameng moo li-transformer li leng bohlokoa haholo bakeng sa ho aba matla ka katleho. NGR e thibela maqhubu a phahameng a hona joale ho senya likarolo tse ka hare tsa li-transformer, kahoo e lelefatsa nako ea bophelo ea lisebelisoa.
3.Ho matlafatsa Botsitso le Tšireletseho ea Tsamaiso
Sistimi ea ho thella ka li-NGR e ntlafatsa botsitso ba sistimi ka ho thibela ho fetoha ho hoholo ha motlakase nakong ea liphoso tsa fatše. Sena se tiisa hore likarolo tse sa ameheng tsa tsamaiso li ka tsoela pele ho sebetsa, kahoo li fokotsa nako ea ho theoha.
Ho feta moo, ho beha moeli oa phoso ho boleng bo boletsoeng esale pele ho ntlafatsa polokeho ea basebetsi. Maqhubu a fokolang a fokolang a fokotsa kotsi ea ho tsosoa ke motlakase le ho fokotsa likotsi tsa mollo tse ka bakoang ke mathata a matla a fatše.
4.Ho Thusa ho Fumana Phoso le Tlhokomelo
Ka ho laola bothata ba hona joale, li-NGR li nolofaletsa ho lemoha liphoso. Hona joale ho feta ho hanyetsa ho ka lekanyetsoa, ho hlahisa li-alarm kapa li-relay tse sireletsang ho tsebisa basebetsi ka phoso. Sena se thusa ho rarolla mathata a lehae ka potlako, ho thusa ho lokisoa ka potlako le ho fokotsa nako ea ho theoha ka kakaretso.
E boetse e thusa lits'ebeletso le liindasteri ho fokotsa tšitiso ea ts'ebetso, haholo lits'ebetsong tsa bohlokoa joalo ka lifeme tsa phepelo ea motlakase, merero ea matla a tsosolositsoeng, le lits'ebeletso tsa indasteri.
5.Ho lumellana le Melao le Melao ea Motlakase
Litsi tse ngata tsa indasteri le lits'ebeletso li tlameha ho latela melaoana e thata ea motlakase le melaoana ea polokeho, e laelang ts'ebeliso ea lits'ebetso tsa fatše joalo ka li-NGR ho thibela tšenyo ea lisebelisoa le ho netefatsa polokeho ea basebetsi.
Litsi tsa li-NGR li thusa ho fihlela litekanyetso tsena tsa taolo ka ho etsa bonnete ba hore maqhubu a phoso a lula a le maemong a sireletsehileng.
Mefuta ea li-NGR le Lisebelisoa tsa tsona
Li-NGR li tla ka litlhophiso tse fapaneng ho latela matla a motlakase le maemo a hajoale a hlokahalang. Ka mohlala, boleng ba ho hanyetsa bo ka fetoloa ho netefatsa hore phoso ea hona joale e lekanyelitsoe ho boleng bo itseng, hangata ka har'a 10 ho ea ho 1,000 amperes. Sena se etsa hore li sebetse mefuteng e mengata ea li-transformer:
● Li-transformer tse nang le matla a phahameng ka har'a li-substations li rua molemo ho li-NGR kaha li fokotsa maqhubu a maholo a phoso, ho thibela tšenyo ea li-transformer tse kholo tsa matla.
● Li-transformer tse nang le matla a mahareng liindastering li sebelisa li-NGR ho sireletsa lits'ebetso tsa tlhahiso ho sitisoe ke motlakase ka mokhoa o sa lebelloang ka lebaka la liphoso tsa fatše.
Qetello
The Neutral Grounding Resistor ke sesebelisoa sa bohlokoa mererong ea li-transformer, e fanang ka tšireletso le botsitso ho litsamaiso tsa motlakase. Ka ho fokotsa mathata a hona joale, ho thibela tšenyo ea lisebelisoa, le ho ntlafatsa polokeho, NGR ke karolo ea bohlokoa bakeng sa liindasteri tse itšetlehileng ka li-transformer bakeng sa kabo ea tsona ea matla. Tšebeliso ea eona e atileng lits'ebetsong tse fapaneng, ho kenyeletsoa lifeme tsa indasteri, lits'ebeletso tsa motlakase, le merero ea matla a tsosolositsoeng, e totobatsa bohlokoa ba eona boenjiniere ba mehleng ea kajeno.
Nako ea poso: Oct-10-2024