Isigaba sesi-3 – Iqondwa kanjani incazelo yegama elithi “clearance”
clearance: ibanga elifushane emoyeni phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive kanye ne-
indawo efinyelelekayo.
Ukuhlanzeka kuwumqondo obaluleke kakhulu. Ukuze siqonde imvume, sidinga ukuphinda sikusho ukuthi akukho lutho oluvalwe ngokuphelele, futhi umoya ungaqhuba nogesi. Lapho i-voltage iphezulu kakhulu, i-current izoqhutshwa emoyeni. Ukushaywa kombani ngesikhathi sokuduma kwezulu kuyisibonelo esivamile sombani oshaya emoyeni. I-voltage yombani iphezulu kakhulu, ngakho-ke ingadabula engxenyeni ende yomoya, okwenza lesi sigaba somoya sibe ne-conductive. Ezitshalweni zikagesi zasendlini, nakuba i-voltage iphansi kakhulu, kunomoya omningi emkhiqizweni, futhi okwamanje kuzoqhutshwa emoyeni. Njengoba i-voltage ikhula, ibanga i-voltage engase inqamule emoyeni nalo lizoba lide. Lokhu kubangela umqondo wokukhipha imvume.
Ukuze uthole incazelo eningiliziwe yokugunyazwa, sicela ubheke i-IEC 60664-1 (Ukuxhumanisa ukufakwa kwe-insulation kumishini engaphakathi kwamasistimu anamandla kagesi aphansi – Ingxenye 1: Izimiso, izidingo nezivivinyo).
Ngicabanga ukuthi izithombe ezilandelayo zingayichaza kahle indlela yokukhishwa kukagesi.
Lapho sichaza i-insulation eyisisekelo kanye ne-functional insulation, sinikeze izithombe zangempela ukuchaza izibonelo zokususwa kanye ne-creepage.
Umfanekiso 11– Izibonelo zokucaciswa kwezinga le-IEC 60335-1 linikeza isibonelo esilula. Ngokusekelwe kulesi sibalo, singacabanga ngezici eziyisisekelo zezinto zikagesi zesigaba II, ukwakhiwa kwekilasi II, umshini wekilasi I, nokwakhiwa kwekilasi I.
Ukhiye
1 ingxenye yensimbi engavubukuliwe efinyelelekayo
2 indawo
3 ingxenye yensimbi enobumba efinyelelekayo
4 ingxenye yensimbi engafinyeleleki engafinyeleleki
Uhlobo lwe-insulation Clearance
basic insulation L1A
L1D
L2F
I-insulation esebenzayo L1L2
supplementary insulation DE
FG
I-reinforced insulation L1K
L1J
L2I
L1C
QAPHELA Uma ukucaciswa kwe-L1D noma i-L2F kuhlangabezana nezidingo zokugunyazwa zokufakwa kwensimbi okuqinisiwe, ukucaciswa kwe-DE noma i-FG yokufakwa kwe-supplementary insulation akukalwa.
L1C
NOTE If the clearances L1D or L2F meet the clearance requirements for reinforced insulation, the clearances DE or FG of supplementary insulation are not measured.
indawo efinyelelekayo.
Ukuhlanzeka kuwumqondo obaluleke kakhulu. Ukuze siqonde imvume, sidinga ukuphinda sikusho ukuthi akukho lutho oluvalwe ngokuphelele, futhi umoya ungaqhuba nogesi. Lapho i-voltage iphezulu kakhulu, i-current izoqhutshwa emoyeni. Ukushaywa kombani ngesikhathi sokuduma kwezulu kuyisibonelo esivamile sombani oshaya emoyeni. I-voltage yombani iphezulu kakhulu, ngakho-ke ingadabula engxenyeni ende yomoya, okwenza lesi sigaba somoya sibe ne-conductive. Ezitshalweni zikagesi zasendlini, nakuba i-voltage iphansi kakhulu, kunomoya omningi emkhiqizweni, futhi okwamanje kuzoqhutshwa emoyeni. Njengoba i-voltage ikhula, ibanga i-voltage engase inqamule emoyeni nalo lizoba lide. Lokhu kubangela umqondo wokukhipha imvume.
Ukuze uthole incazelo eningiliziwe yokugunyazwa, sicela ubheke i-IEC 60664-1 (Ukuxhumanisa ukufakwa kwe-insulation kumishini engaphakathi kwamasistimu anamandla kagesi aphansi – Ingxenye 1: Izimiso, izidingo nezivivinyo).
Ngicabanga ukuthi izithombe ezilandelayo zingayichaza kahle indlela yokukhishwa kukagesi.
Lapho sichaza i-insulation eyisisekelo kanye ne-functional insulation, sinikeze izithombe zangempela ukuchaza izibonelo zokususwa kanye ne-creepage.
Umfanekiso 11– Izibonelo zokucaciswa kwezinga le-IEC 60335-1 linikeza isibonelo esilula. Ngokusekelwe kulesi sibalo, singacabanga ngezici eziyisisekelo zezinto zikagesi zesigaba II, ukwakhiwa kwekilasi II, umshini wekilasi I, nokwakhiwa kwekilasi I.
Ukhiye
1 ingxenye yensimbi engavubukuliwe efinyelelekayo
2 indawo
3 ingxenye yensimbi enobumba efinyelelekayo
4 ingxenye yensimbi engafinyeleleki engafinyeleleki
Uhlobo lwe-insulation Clearance
basic insulation L1A
L1D
L2F
I-insulation esebenzayo L1L2
supplementary insulation DE
FG
I-reinforced insulation L1K
L1J
L2I
L1C
QAPHELA Uma ukucaciswa kwe-L1D noma i-L2F kuhlangabezana nezidingo zokugunyazwa zokufakwa kwensimbi okuqinisiwe, ukucaciswa kwe-DE noma i-FG yokufakwa kwe-supplementary insulation akukalwa.
L1C
NOTE If the clearances L1D or L2F meet the clearance requirements for reinforced insulation, the clearances DE or FG of supplementary insulation are not measured.