Iswitshi yomoya (emva koku kubhekiselwa kuyo njenge "switshi yomoya", apha sibhekisa ngokukodwa kwi-GB10963.1 isiqhelo sesaphuli sesekethe sasekhaya) into yokukhusela ikakhulu intambo, umbuzo ophambili ngulo "kutheni i-air switch kufuneka ibeke ukhuseleko lomthwalo ogqithisiweyo kunye nokhuseleko lwesekethe emfutshane" inokwandiswa ukuba "kutheni intambo ifanele ibeke ukhuseleko lomthwalo ogqithisiweyo kunye nokukhusela isiphaluka esifutshane ngexesha elifanayo"
1.Yintoni i-overcurrent?
I-loop yangoku enkulu kunomlinganiselo ophetheyo ophetheyo we-loop conductor i-overcurrent, kubandakanywa ukugqithiswa kwangoku kunye nombane we-short-circuit current.
2.the cable overload ukhuseleko
Isekethe yombane ngenxa yezixhobo zombane ezininzi okanye izixhobo zombane ngokwazo zilayisha kakhulu (ezifana nomthwalo womatshini wemoto mkhulu kakhulu) kunye nezinye izizathu, ixabiso langoku liphindwe kaninzi kwireyithingi yangoku yesekethe, isiphumo kukuba ubushushu bokusebenza kwentambo budlula. ixabiso elivumelekileyo, ukugquma kwentambo kukhawulezise ukuwohloka, kunciphise ubomi.Ngokomzekelo, kwiintambo ze-PVC, ubushushu obuphezulu obuvumelekileyo bokusebenza ixesha elide ngu-70 ° C, kwaye iqondo lokushisa elivumelekileyo kwimeko yesiphaluka esifutshane alidluli i-160 ° C.
Intambo inokumelana nomthwalo othile wangoku kwithuba elithile lexesha, kodwa ubude bexesha kufuneka bukhawulelwe.Ukuba i-overload yangoku ihlala ixesha elide, i-cable insulation iya konakaliswa, enokuthi ekugqibeleni ibangele impazamo yesiphaluka esifutshane.Ubume bobushushu bomaleko wokugquma wentambo phantsi kwesiqhelo sangoku, ukulayisha ngokugqithisileyo, kunye nombane omfutshane.
Ngoko ke, Kwixabiso eliqhelekileyo lemveliso ye-circuit breaker, i-circuit breaker iyadingeka ukuba ibe yi-1.13In, i-overload yangoku ayisebenzi ngaphakathi kweyure ye-1 (In≤63A}), kwaye xa i-current ivuliwe kwi-1.45In, i-overload umgca kufuneka ususwe ngaphakathi kweyure enye.I-Overload yangoku ivumelekile ukuba iqhubeke ngeyure ye-1 ukuba ithathele ingqalelo ukuqhubeka konikezelo lwamandla kunye nentambo ngokwayo inomthamo othile wokulayisha ngaphezulu, ayikwazi ukuba nomgca wokulayisha kancinci, i-breaker circuit iya kunqumla amandla, okuya kuchaphazela isiqhelo. imveliso kunye nobomi babahlali.
Into yokukhusela ye-breaker circuit yikhebula.Ngaphantsi kweemeko zokugqithiswa, ukugqithiswa kwexesha elide kuya kubangela ukunyuka kweqondo lokushisa, kubangele umonakalo kwi-insulation layer ye-cable, kwaye ekugqibeleni iphoso lesiphaluka esifutshane.
Ngaphantsi kweemeko zesekethe ezimfutshane, iqondo lobushushu liya kunyuka ngexesha elifutshane kakhulu, ukuba alinqunyulwanga ngexesha, linokubangela ukutsha okuzenzekelayo komgangatho wokugquma, njengecandelo lokukhusela le-breaker circuit, zombini umsebenzi wokukhusela umthwalo, kodwa kwakhona kufuneka ufutshane. umsebenzi wokukhusela isiphaluka.
Ixesha lokuposa: Sep-25-2023