Kwiminyaka yakutshanje, ngenkxaso yemigaqo-nkqubo yesizwe yoshishino lwe-broadband, ishishini le-ADSS fibre optic cable liphuhliswe ngokukhawuleza, elikhatshwa ziingxaki ezininzi.
Oku kulandelayo kukuchaza ngokufutshane iindlela ezintlanu zovavanyo esekwe kuxhathiso lwendawo yempazamo:
1. Xa ukuchasana kwephuzu eliphosakeleyo lilingana nokungapheli, kulula ukufumana iphutha lesiphaluka esivulekileyo kunye ne-low-voltage pulse method. Ngokuqhelekileyo, iimpazamo zesekethe ezivulekileyo ezihlambulukileyo aziqhelekanga. Ngokuqhelekileyo iimpazamo zesiphaluka ezivulekileyo ziphantsi komhlaba okanye isigaba ukuya kwisigaba esiphezulu se-impedance, kunye nomhlaba okanye isigaba ukuya kwisigaba esisezantsi Ukubambisana kweempazamo zokumelana.
2. Xa ukuchasana kwephuzu eliphosakeleyo lilingana ne-zero, kulula ukufumana i-short-circuit fault ngokulinganisa i-short-circuit fault kunye ne-low-voltage pulse method, kodwa ayifane idibane nomsebenzi wangempela.
3. Xa ukuchasana kwendawo yephutha kukhulu kune-zero kwaye ngaphantsi kwe-100 kilohms, kulula ukufumana iimpazamo eziphantsi zokumelana nokulinganisa kunye ne-low-voltage pulse method.
4. Iimpazamo zeFlashover zinokulinganiswa ngendlela ye-flash ngqo. Iimpazamo ezinjalo zihlala zikhona ngaphakathi kwesihlanganisi. Ukuchasana kwendawo yephutha kukhulu kune-100 kilohms, kodwa ixabiso litshintsha kakhulu, kwaye umlinganiselo ngamnye awuqinisekanga.
5. Iziphoso eziphezulu zokuchasana zingalinganiswa ngendlela ye-flash-flash, kwaye i-fault point resistance ingaphezu kwe-100 kilohms kwaye ixabiso linqunywe. Ngokubanzi, xa uvavanyo lwangoku lungaphezulu kwe-15 mA, iifomati zovavanyo ziyaphinda-phinda kwaye zinokugqithelana, kwaye i-waveform inokukhutshwa enye, imiboniso emithathu kunye ne-pulse amplitude iyancipha ngokuthe ngcembe, umgama olinganisiweyo ngumgama ukusuka kwindawo yempazamo ukuya kwintambo. ukuphela kovavanyo; Ngaphandle koko Vavanya umgama ukusuka kwindawo yempazamo ukuya kwelinye icala lentambo.