Isigaba sesi-3 – Iqondwa kanjani incazelo ye-“double insulation”
double insulation: isistimu yokuhlukanisa ehlanganisa kokubili ukufakwa okuyisisekelo kanye nokufakwa okungeziwe
Incazelo iwukwenza lula kuphela incazelo yokugquma okuyisisekelo kanye nokwahlukanisa okungeziwe ezingeni, kusetshenziswa igama elilodwa ukuchaza amagama amabili.
Njengoba kukhonjisiwe emfanekisweni ongezansi, intambo yokunikezela inezingqimba ezimbili zokuvala, umgodla wocingo ongaphakathi kanye nomgodla wocingo omnyama ongaphandle, ochazwa ngokuthi ukufakwa kabili.
Njengoba kukhonjisiwe ezithombeni ezimbili ezilandelayo(ifeni), umgodla wezintambo zomthofu zangaphakathi esithombeni kwesokunxele uwukugqumezela okuyisisekelo, futhi ipuleti elingezansi lekesi langaphandle liwukufakwa okungeziwe.
Isithombe sebhodi lesekhethi esilandelayo sinomphumela wokugqwayiza. Uhlangothi olungakwesokudla lomugqa onamachashazi luyingxenye engafinyeleleki ene-voltage yokusebenza engu-220-240V, futhi uhlangothi lwesobunxele lomugqa onamachashazi luyingxenye efinyelelekayo ene-voltage yokusebenza ephezulu engu-24V (kucatshangwa ukuthi isakhiwo esisendaweni yamachashazi. umugqa uhlangabezane nezidingo zokufakelwa okuphindwe kabili noma ukufakwa okuqinisiwe). Ukuze kuqinisekiswe ukuhlukaniswa okuphumelelayo, ngokuvamile, izintambo ezingakwesokudla komugqa onamachashazi (izintambo zangaphakathi ezibomvu neziluhlaza okwesibhakabhaka) azikwazi ukuthinta izintambo zangaphakathi ezincanyana ngokuqhathaniswa kwesokunxele. I-wire sheath yocingo olungakwesokudla iwukuhlukanisa okuyisisekelo, ngoba i-wire sheath ithintana ngqo nezingxenye ezibukhoma futhi iyisendlalelo sokuqala sokuvikela izingxenye ezibukhoma. Igobolondo lentambo yocingo lwesokunxele lingachazwa kuphela ngokuthi i-supplemental insulation, kodwa ukuthi liyahlangabezana yini nezidingo zokufakwa okungeziwe esigatshaneni sama-29.3 kuzohlaziywa lapho kwethulwa isigatshana 29.3.
Kumele kuqashelwe lapha ukuthi igobolondo lentambo yesokunxele alikwazi ukuchazwa njengokuvala okuyisisekelo, futhi umgodla wocingo wocingo olungakwesokudla awunakuba ukufakwa okungeziwe.
Incazelo iwukwenza lula kuphela incazelo yokugquma okuyisisekelo kanye nokwahlukanisa okungeziwe ezingeni, kusetshenziswa igama elilodwa ukuchaza amagama amabili.
Njengoba kukhonjisiwe emfanekisweni ongezansi, intambo yokunikezela inezingqimba ezimbili zokuvala, umgodla wocingo ongaphakathi kanye nomgodla wocingo omnyama ongaphandle, ochazwa ngokuthi ukufakwa kabili.
Njengoba kukhonjisiwe ezithombeni ezimbili ezilandelayo(ifeni), umgodla wezintambo zomthofu zangaphakathi esithombeni kwesokunxele uwukugqumezela okuyisisekelo, futhi ipuleti elingezansi lekesi langaphandle liwukufakwa okungeziwe.
Isithombe sebhodi lesekhethi esilandelayo sinomphumela wokugqwayiza. Uhlangothi olungakwesokudla lomugqa onamachashazi luyingxenye engafinyeleleki ene-voltage yokusebenza engu-220-240V, futhi uhlangothi lwesobunxele lomugqa onamachashazi luyingxenye efinyelelekayo ene-voltage yokusebenza ephezulu engu-24V (kucatshangwa ukuthi isakhiwo esisendaweni yamachashazi. umugqa uhlangabezane nezidingo zokufakelwa okuphindwe kabili noma ukufakwa okuqinisiwe). Ukuze kuqinisekiswe ukuhlukaniswa okuphumelelayo, ngokuvamile, izintambo ezingakwesokudla komugqa onamachashazi (izintambo zangaphakathi ezibomvu neziluhlaza okwesibhakabhaka) azikwazi ukuthinta izintambo zangaphakathi ezincanyana ngokuqhathaniswa kwesokunxele. I-wire sheath yocingo olungakwesokudla iwukuhlukanisa okuyisisekelo, ngoba i-wire sheath ithintana ngqo nezingxenye ezibukhoma futhi iyisendlalelo sokuqala sokuvikela izingxenye ezibukhoma. Igobolondo lentambo yocingo lwesokunxele lingachazwa kuphela ngokuthi i-supplemental insulation, kodwa ukuthi liyahlangabezana yini nezidingo zokufakwa okungeziwe esigatshaneni sama-29.3 kuzohlaziywa lapho kwethulwa isigatshana 29.3.
Kumele kuqashelwe lapha ukuthi igobolondo lentambo yesokunxele alikwazi ukuchazwa njengokuvala okuyisisekelo, futhi umgodla wocingo wocingo olungakwesokudla awunakuba ukufakwa okungeziwe.