Isigaba sesi-3 – Iqondwa kanjani incazelo “yensiza yeklasi II”
Into esetshenziswayo yekilasi II: into esetshenziswayo lapho ukuvikeleka kokushaqeka kukagesi kungancikile insulation eyisisekelo kuphela kodwa lapho kunikezwa khona izinyathelo zokuphepha ezengeziwe, njengokuthi double insulation noma reinforced insulation, akukho ukuhlinzekwa komhlaba ovikelayo noma ukuthembela ezimeni zokufakwa.
QAPHELA 1 Isisetshenziswa esinjalo singaba ngolunye kulezi zinhlobo ezilandelayo:
– into esetshenziswayo enendawo evalekile ehlala isikhathi eside neqhubekayo yezinto ezivalelayo ezimboza zonke izingxenye zensimbi, ngaphandle kwezingxenye, ezifana nama-nameplates, izikulufu nama-rivets, eziqhelelene nazo izingxenye ezibukhoma by insulation okungenani ilingane reinforced insulation; umshini onjalo ubizwa ngokuthi i-insulationencased isisetshenziswa sekilasi II;
– into esetshenziswayo enendawo ebiyelwe yensimbi eqhubekayo, lapho double insulation noma reinforced insulation isetshenziswa kulo lonke; umshini onjalo ubizwa ngokuthi insimbi-encased isisetshenziswa sekilasi II;
– into esetshenziswayo eyinhlanganisela ye-insulation-encased isisetshenziswa sekilasi II kanye nensimbi isisetshenziswa sekilasi II.
QAPHELA 2 Indawo evalekile ye-insulation-encased isisetshenziswa sikagesi sekilasi II ingaba ingxenye noma yonke i-supplementary insulation noma kwe reinforced insulation.
Lapha sicabanga ngokombono wezinyathelo ezimbili zokuphepha. Ngokungeziwe ekufakeni okuyisisekelo, umkhiqizo udinga olunye ungqimba lwe-insulation, okungukuthi, izinyathelo zokuhlukanisa kabili ukuze kuqinisekiswe ukuthi uma noma yikuphi ungqimba lwe-insulation luhluleka, kuzoba nolunye ungqimba lokugxilisa ukuze ludlale indima yokuvikela. Umphumela we-anti-electric shock we-insulation eqinisiwe ulingana nokufakwa okuphindwe kabili ezimweni eziningi, ngakho-ke kubuye kubhekwe njengendlela ephumelelayo yokuqapha kabili. Izinto zikagesi zeSigaba II ezichazwe ngezinga elijwayelekile zigcizelela ngokuyinhloko ukuthi into esetshenziswayo ifinyelela umphumela wokufakwa okuphindwe kabili nge-casing yayo, izintambo ezivalekile, namashethi ezintambo ezivalekile. Izinto zikagesi ezinezinyathelo zokuhlanganisa umhlaba ziyizinto zikagesi ze-Class I, ngakho izinto zikagesi ze-Class II azinawo umhlaba ovikelayo.
Ngaphandle kwemishini ye-Class 0, zonke izinto zikagesi ezinepulasitiki yendawo enkulu noma izindlu zokuvalela umoya ngokuvamile ziklanywa njengezinto zikagesi ze-Class II. Kodwa-ke, kukhona futhi amanye amamotho anezindlu zensimbi, nakuba umkhiqizo ungahlangabezana nezidingo zemishini ye-Class II, kusekhona isilinganiso sokuvikela umhlaba kunjini. Lesi sisetshenziswa sithathwa njengesisetshenziswa se-Class I. Amanothi alesi sigaba somthetho anikeza isingeniso ezicini zesakhiwo sazo zonke izinto zikagesi ezingenzeka ze-Class II.
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.
QAPHELA 1 Isisetshenziswa esinjalo singaba ngolunye kulezi zinhlobo ezilandelayo:
– into esetshenziswayo enendawo evalekile ehlala isikhathi eside neqhubekayo yezinto ezivalelayo ezimboza zonke izingxenye zensimbi, ngaphandle kwezingxenye, ezifana nama-nameplates, izikulufu nama-rivets, eziqhelelene nazo izingxenye ezibukhoma by insulation okungenani ilingane reinforced insulation; umshini onjalo ubizwa ngokuthi i-insulationencased isisetshenziswa sekilasi II;
– into esetshenziswayo enendawo ebiyelwe yensimbi eqhubekayo, lapho double insulation noma reinforced insulation isetshenziswa kulo lonke; umshini onjalo ubizwa ngokuthi insimbi-encased isisetshenziswa sekilasi II;
– into esetshenziswayo eyinhlanganisela ye-insulation-encased isisetshenziswa sekilasi II kanye nensimbi isisetshenziswa sekilasi II.
QAPHELA 2 Indawo evalekile ye-insulation-encased isisetshenziswa sikagesi sekilasi II ingaba ingxenye noma yonke i-supplementary insulation noma kwe reinforced insulation.
Lapha sicabanga ngokombono wezinyathelo ezimbili zokuphepha. Ngokungeziwe ekufakeni okuyisisekelo, umkhiqizo udinga olunye ungqimba lwe-insulation, okungukuthi, izinyathelo zokuhlukanisa kabili ukuze kuqinisekiswe ukuthi uma noma yikuphi ungqimba lwe-insulation luhluleka, kuzoba nolunye ungqimba lokugxilisa ukuze ludlale indima yokuvikela. Umphumela we-anti-electric shock we-insulation eqinisiwe ulingana nokufakwa okuphindwe kabili ezimweni eziningi, ngakho-ke kubuye kubhekwe njengendlela ephumelelayo yokuqapha kabili. Izinto zikagesi zeSigaba II ezichazwe ngezinga elijwayelekile zigcizelela ngokuyinhloko ukuthi into esetshenziswayo ifinyelela umphumela wokufakwa okuphindwe kabili nge-casing yayo, izintambo ezivalekile, namashethi ezintambo ezivalekile. Izinto zikagesi ezinezinyathelo zokuhlanganisa umhlaba ziyizinto zikagesi ze-Class I, ngakho izinto zikagesi ze-Class II azinawo umhlaba ovikelayo.
Ngaphandle kwemishini ye-Class 0, zonke izinto zikagesi ezinepulasitiki yendawo enkulu noma izindlu zokuvalela umoya ngokuvamile ziklanywa njengezinto zikagesi ze-Class II. Kodwa-ke, kukhona futhi amanye amamotho anezindlu zensimbi, nakuba umkhiqizo ungahlangabezana nezidingo zemishini ye-Class II, kusekhona isilinganiso sokuvikela umhlaba kunjini. Lesi sisetshenziswa sithathwa njengesisetshenziswa se-Class I. Amanothi alesi sigaba somthetho anikeza isingeniso ezicini zesakhiwo sazo zonke izinto zikagesi ezingenzeka ze-Class II.
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.