Ubume, uMgaqo kunye noKhetho lweFuse

I-Fuse, eyaziwa njenge-inshurensi, yenye yezona zinto zilula zokukhusela izixhobo zombane. Xa izixhobo zombane kwigridi yamandla okanye ukugqithiswa kwesekethe okanye isiphaluka esifutshane, sinokunyibilika kwaye siphule isiphaluka ngokwaso, sigweme igridi yamandla kunye nomonakalo wezixhobo zombane ngenxa yempembelelo ye-thermal ye-overcurrent kunye namandla ombane, kunye nokuthintela ukusasazeka kombane. ingozi.

Enye, imodeli yefuse

Unobumba wokuqala u-R umele i-fuse.

Unobumba wesibini u-M uthetha ukuba akukho kupakishwa uhlobo lwetyhubhu evaliweyo;

T uthetha uhlobo lwetyhubhu epakishiweyo;

L uthetha i-spiral;

U-S umele ifom ekhawulezayo;

C imele i-porcelain insert;

Z imele i-self-duplex.

Okwesithathu yikhowudi yoyilo yefuse.

Eyesine imele umlinganiselo wangoku wefuse.

Okwesibini, ulwahlulo lweefusi

Ngokwesakhiwo, i-fuses inokwahlulwa ibe ngamacandelo amathathu: uhlobo oluvulekileyo, uhlobo oluvaliweyo kunye nohlobo oluvaliweyo.

1. Vula uhlobo lwe-fuse

Xa ukunyibilika akuthinteli i-arc flame kunye nentsimbi enyibilikayo i-particle ejection device, ifanelekile kuphela ukuqhawula i-short circuit yangoku ayikho iziganeko ezinkulu, le fuse isetyenziswa rhoqo ngokudibanisa ne-knife switch.

2. I-semi-enclosed fuse

I-fuse ifakwe kwi-tube, kwaye enye okanye zombini iziphelo zombhobho zivuliwe. Xa i-fuse inyibilika, i-arc flame kunye ne-metal particles enyibilikayo ikhutshwe kwicala elithile, elinciphisa ukulimala kwabasebenzi, kodwa ayikakhuselekanga ngokwaneleyo kwaye ukusetyenziswa kulinganiselwe kwinqanaba elithile.

3. Ifuse evalelweyo

I-fuse ifakwe ngokupheleleyo kwi-shell, ngaphandle kwe-arc ejection, kwaye ayiyi kubangela ingozi kwindawo ekufutshane ehlala kuyo i-flying arc kunye nabasebenzi abasondeleyo.

Isithathu, isakhiwo se-fuse

I-fuse iqulunqwe ikakhulu yi-melt kunye netyhubhu ye-fuse okanye isibambi se-fuse apho i-melt ifakwe khona.

I-1.I-Melt yinxalenye ebalulekileyo ye-fuse, ehlala yenziwe isilika okanye ishidi. Kukho iindidi ezimbini zemathiriyeli yokunyibilika, enye yimathiriyeli esezantsi yokunyibilika, njengelothe, i-zinc, i-tin kunye ne-tin-lead alloy; Enye yimathiriyeli ephezulu yokunyibilika, njengesilivere kunye nobhedu.

I-2.I-tube encibilikayo yigobolondo ekhuselayo yokunyibilika, kwaye inefuthe lokucima i-arc xa i-melt idibene.

Ezine, iiparamitha ze-fuse

Iiparamitha ze-fuse zibhekisela kwiiparamitha ze-fuse okanye umnini we-fuse, kungekhona i-parameters of melt.

1. Iiparamitha ezinyibilikayo

I-melt ineeparamitha ezimbini, i-current rated current kunye ne-fusing current. Ukulinganisa kwangoku kubhekiselele kwixabiso langoku elidlula kwi-fuse ixesha elide ngaphandle kokuphuka. I-fuse yangoku idla ngokuphindwe kabini i-current rated current, ngokuqhelekileyo ngokusebenzisa i-melting yangoku yi-1.3 ngokuphindwe kabini yangoku, kufuneka idityaniswe ngaphezu kweyure enye; 1.6 amaxesha, kufuneka kudityaniswe kwiyure enye; Xa i-fuse yangoku ifikeleleke, i-fuse iphukile emva kwe-30 ~ 40 imizuzwana; Xa i-9 ~ 10 amaxesha okulinganiswa kwangoku kufikelelwe, inyibilika kufuneka iphuke kwangoko. Ukunyibilika kunophawu olukhuselayo lwexesha eliguquguqukayo, inkulu ikhoyo ngoku equkuqelayo kwinyibilika, imfutshane ixesha lokudibanisa.

2. Iiparamitha zombhobho we-welding

I-fuse ineeparamitha ezintathu, ezizezi, amandla ombane alinganisiweyo, amandla akhoyo kunye nokunqunyulwa kwamandla.

I-1) Umbane olinganisiweyo ucetywayo kwi-Angle ye-arc yokucima. Xa i-voltage esebenzayo ye-fuse inkulu kune-voltage elinganisiweyo, kunokubakho ingozi yokuba i-arc ayikwazi ukucima xa i-melt iphukile.

I-2) Umlinganiselo wangoku wetyhubhu etyhidiweyo lixabiso langoku elinqunywe ngubushushu obuvumelekileyo betyhubhu etyhidiweyo ixesha elide, ngoko ityhubhu etyhidiweyo inokulayishwa ngamabakala ahlukeneyo akhoyo ngoku, kodwa ukulinganisa okwangoku kwetyhubhu etyhidiweyo. ingabi nkulu kunomlinganiselo wangoku wombhobho otyhidiweyo.

3) Umthamo wokunqunyulwa lilona xabiso liphezulu langoku elinokunqunyulwa xa i-fuse inqanyuliwe kwisiphambeko sesiphaluka kwi-voltage elinganisiweyo.

Isihlanu, umgaqo wokusebenza wefuse

Inkqubo yokudibanisa yefuse yahlulwe ngokwezigaba ezine:

1. Ukunyibilika kuluhlu kwisekethe, kwaye umthwalo wangoku uhamba nge-melt. Ngenxa yempembelelo ye-thermal yangoku iya kwenza ukunyuka kweqondo lokushisa lokunyibilika, xa ukugqithiswa kwesiphaluka okanye isiphaluka esifutshane senzeke, i-overload yangoku okanye i-short circuit yangoku iya kwenza ukunyibilika kobushushu obugqithisileyo kunye nokufikelela kwiqondo lokushisa elinyibilikayo. Ukuphakama kwangoku, ngokukhawuleza ubushushu bukhuphuka.

2. Inyibilika iya kunyibilika kwaye ikhuphe umphunga wesinyithi emva kokufikelela kubushushu obunyibilikayo. Xa iphezulu yangoku, ixesha lokunyibilika lifutshane.

3. Umzuzwana uncibilika, kukho i-gap encinci ye-insulation kwisekethe, kwaye i-current iphazamiseka ngokukhawuleza. Kodwa le gap encinci ichithwa ngokukhawuleza yi-voltage yesiphaluka, kwaye i-arc yombane yenziwe, leyo idibanisa isiphaluka.

4. Emva kokuba i-arc yenzeke, ukuba amandla ayancipha, aya kuzicima ngokwawo ngokwandiswa kwe-gap ye-fuse, kodwa kufuneka ithembele kwimilinganiselo yokucima i-fuse xa amandla makhulu. Ukuze kuncitshiswe ixesha lokucima i-arc kunye nokwandisa amandla okuqhawula, i-fuses enkulu yamandla ixhotyiswe ngamanyathelo okucima i-arc agqibeleleyo. Inkulu amandla okucima i-arc, ngokukhawuleza i-arc icinyiwe, kwaye inkulu i-current circuit current inokophulwa yi-fuse.

Isithandathu, ukhetho lwefuse

1. Khetha iifusi ezinamaqondo ombane ahambelanayo ngokwegridi yamandla ombane;

2. Khetha iifusi ezinesakhono sokuqhawuka esihambelanayo ngokwesona siphumo siphezulu sangoku esinokuthi senzeke kwinkqubo yokuhambisa;

I-3, i-fuse kwisekethe yemoto yokukhusela isiphaluka esifutshane, ukuze ugweme i-motor kwinkqubo yokuqala i-fuse, kwi-motor enye, i-current elinganisiweyo yokunyibilika akufanele ibe ngaphantsi kwe-1.5 ~ 2.5 amaxesha angoku. yemoto; Kwii-motor ezininzi, i-total melt rated current ayiyi kuba ngaphantsi kwe-1.5 ~ 2.5 yamaxesha angoku okulinganisa amandla ombane obuninzi kunye nomthwalo okhoyo obaliweyo wezinye iimoto.

4. Ukukhusela i-short-circuit yokukhanyisa okanye isithando sombane kunye neminye imithwalo, i-current rated of melt kufuneka ilingane okanye incinci ngaphezu komthamo olinganisiweyo womthwalo.

5. Xa usebenzisa i-fuses ukukhusela imigca, i-fuses kufuneka ifakwe kumgca wesigaba ngasinye. Akuvunyelwe ukufaka iifuse kumgca ongathathi hlangothi kwisigaba sesibini sesithathu okanye isigaba sesithathu sesekethe yesine, kuba ukuphulwa komgca ongathathi hlangothi kuya kubangela ukungalingani kwe-voltage, enokuthi itshise izixhobo zombane. Kwimigca yesigaba esisodwa esibonelelwa yigridi yoluntu, i-fuses kufuneka ifakwe kwimigca engathathi hlangothi, ngaphandle kwe-fuses epheleleyo yegridi.

6. Onke amanqanaba e-fuses kufuneka asebenzisane kunye xa esetyenziswa, kwaye umlinganiselo olinganisiweyo wokunyibilika kufuneka ube mncinci kunomgangatho ophezulu.