Mene ne: Magnetic motor kewaye hutu
Wadannan kewaye hutu kare shuka daga short haihuwarka da iyãkõkin sabõda warwarewarsu iya aiki da kuma ta wajen Magnetic triggers (daya da zamani). Magnetic kewaye BREAKING ne duk-iyakacin duniya daga farkon: daya Magnetic jawo za lokaci guda bude duk sandunan.
Domin low short-kewaye igiyoyin, kewaye hutu aiki da sauri fiye da fis din. Wannan kariya tana biye da IEC 60947-2 misali. Don karya a takaice-kewaye halin yanzu yadda ya kamata, akwai uku imperatives:
· Early ganewa na karkatattun halin yanzu,
· Rapid rabuwa da lambobi,
· Breakage na gajarta da'ira halin yanzu.
AC Motors - Kariya da short haihuwarka
Kowane lantarki motor yana aiki iyaka. Overshooting wadannan iyaka zai ƙarshe a hallaka shi da kuma tsarin shi koran, da nan da nan sakamako zama aiki kashewa da kuma asarar. A takaice kewaye shi ne kai tsaye lamba tsakanin maki biyu na daban-daban da wutar lantarki yuwuwar:
- alternating halin yanzu : lokaci-zuwa-lokaci lamba, lokaci-zuwa-tsaka tsaki lamba, lokaci-zuwa-kasa lamba ko lambar sadarwa tsakanin windings a wani lokaci,
- Direct current: contact between two poles or between the ground and the pole insulated from it.
Wannan zai iya samun yawan haddasawa: lalacewar da varnish insulating da conductors, sako-sako da, karya ko kwace wayoyi ko igiyoyi, karfe waje jikinsu, gudanar da adibas (ƙura, danshi, da dai sauransu), seepage na ruwa ko wasu gudanar da ruwaye, ba daidai ba wayoyi a taron ko ana gyara.
A takaice kewaye sakamakon a wani kwatsam karuwa na yanzu wanda za a iya isa da dama da ɗari sau da aiki halin yanzu a cikin ƴan daƙiƙa. A takaice kewaye iya samun yankunan da illa da kuma mai tsanani lalacewar kayan aiki. Yana aka kwatanta da biyu mamaki.
thermal sabon abu
A thermal sabon abu m da makamashi sake cikin lantarki kewaye ketare da gajeren kewaye halin yanzu na ga a lokaci t dangane da dabara na 2 t da kuma bayyana a matsayin A 2 s. Wannan thermal sakamako zai iya sa:
· Narkewa da shugaba lambobi,
· Rushewar da za ta thermal abubuwa a wani bimetal gudun ba da sanda idan daidaituwa ne irin 1,
· Generation na lantarki arcs,
· Calcination na insulating abu,
· Wutã a cikin kayan aiki.
· Fis din , wanda karya da kewaye ta narkewa da kuma dole ne a maye gurbin bayan haka,
· Magnetic kewaye hutu wanda ta atomatik karya da kewaye da kuma kawai na bukatar ya zama sake saiti.
Short-kewaye kariya kuma za a iya gina a cikin multifunction na'urorin kamar mota Starter kariya da kuma contactor hutu.
Ma'anar da halaye
Babban halaye na gajarta da'ira kariya na'urorin su ne:
· Breaking iya aiki : da mafi darajar a kiyasta gajarta da'ira halin yanzu da cewa wani kariya na'urar iya karya a iyakancen ƙarfin lantarki,
· Rufe damar : da mafi darajar mai kariya na'urar iya isa a ta rated ƙarfin lantarki a kayyade yanayi. A rufe darajar ne k sau hutu iya aiki kamar yadda aka nuna a tebur a kasa.
Hutu damar (BC) |
φ cos |
Rufewa iya aiki (CC) |
4.5kA <BC <6kA |
0.7 |
1.5 BC |
6kA <BC <10kA |
0.5 |
1.7 BC |
10kA <BC <20kA |
0.3 |
2 BC |
20kA <BC <50kA |
0.25 |
2.1 BC |
50kA <BC |
0.2 |
2.2 BC |
Hutu da kuma rufe capacities for kewaye hutu da IEC 60947-2 misali
Fis din
Fis din yin lokaci-da-lokaci (guda iyakacin duniya) kariya da wani babban hutu iya aiki a low girma. Sun iyakance I2t da electrodynamic danniya (Icrête).
Suna saka:
· A musamman goyon bayan kira fuseholders,
· Ko a isolators a wurin kwasfa da kuma links.
Lura cewa tafiya nuna alama fis harsashi za a iya aike zuwa wani dukkan-iyakacin duniya sharuddan sauyawa na'urar (yawanci mota iko contactor) su hana singlephase aiki a lokacin da suka narke.
Fis din amfani da mota kariya ne musamman a abin da suka bari ta hanyar da overcurrents saboda da magnetising halin yanzu a lokacin da Motors an kunna na'urar. Su ba su dace da kariya da obalodi (sabanin gg fis din) sai wani obalodi gudun ba da sanda dole ne a kara wa mota da samar da lantarki kewaye. A general, su size ya zama kamar sama da cikakken load halin yanzu na mota.
Post time: Aug-13-2018