functional insulation as well as other insulation exists on circuit boards. Typically, the surface environment of a circuit board is determined to be either Pollution degree 3 or pollution degree 2.If the circuit board is mounted in an electrical box and sealed with a solid sealant, the sealing will look as follows: What should be…
The following circuit diagram The current fuse in position F1 is usually connected in series with the line.The photos of the real thing are shown in the following two pictures, the left one is not labeled, the right one shows the location of the current fuse and some other basic information. In the diagram above,…
We are discussing here the second structure of the PTC heating element, PTC heating element structure please refer to the explanation of its definition. How is the creepage distance of the functional insulation at the location of the red circle in Figure 1 determined? We all know that NOTE 1 of TABLE 18 section has…
ibanga le-creepage: ibanga elifushane kakhulu endaweni yokufakwa phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive nendawo efinyelelekayo. Izinkokhelo zingasakazwa ngendlela eqondisayo emoyeni, ngaleyo ndlela zenze umsinga. Lona incazelo yokukhishwa. Izindleko zingase futhi zisakaze ngokusebenzisa impahla yokuvikela uqobo, ngoba akukho mpahla evalwe ngokuphelele. Umehluko wamanje owakheke phakathi kwama-electrode amabili lapho ama-electrode amabili anamandla ahlukene esetshenziswa ezinhlangothini…
clearance: ibanga elifushane emoyeni phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive kanye ne-indawo efinyelelekayo. Ukuhlanzeka kuwumqondo obaluleke kakhulu. Ukuze siqonde imvume, sidinga ukuphinda sikusho ukuthi akukho lutho oluvalwe ngokuphelele, futhi umoya ungaqhuba nogesi. Lapho i-voltage iphezulu kakhulu, i-current izoqhutshwa emoyeni. Ukushaywa kombani ngesikhathi sokuduma kwezulu kuyisibonelo esivamile sombani oshaya emoyeni. I-voltage yombani iphezulu kakhulu,…
i-functional insulation: ukwahlukanisa phakathi kwezingxenye ze-conductive zamandla ahlukene okudingeka kuphela ekusebenzeni kahle komshini. I-insulation esebenzayo isethwe ngenxa yezidingo zokusebenza zomshini. Emikhiqizweni kagesi, kufanele kube nezingxenye ze-conductive ezinamandla ahlukene (ama-voltage ahlukene). Uma i-voltage yawo wonke ama-conductor anamandla emkhiqizweni iyafana, into esetshenziswayo ayikwazi ukusebenza. Khona-ke, kukhona ukufakwa okusebenzayo phakathi kwezingxenye ezahlukene ze-conductive. Uma sicabanga ukuthi i-voltage elinganiselwe…
isisekelo se-insulation: kanye ne-nbsp;i-insulation isetshenziswa ezingxenyeni eziphilayo ukuze kunikeze isivikelo esiyisisekelo ngokumelene nokushaqeka kukagesi Njengoba kukhonjisiwe esithombeni esingakwesokunxele ngezansi, isithombe sekhava engezansi yefeni, futhi isithombe esingakwesokudla isithombe esingenayo ikhava engezansi. Isikhumba socingo oluluhlaza nolunsundu ngaphakathi kwentambo yokuhlinzeka esithombeni esilungile singabhekwa njengokwahlukanisa okuyisisekelo. Ngesikhathi esifanayo, izikhumba zocingo ezimhlophe, ezibomvu nezimnyama ekushintsheni okuxhunywe kugobolondo elimnyama nazo zingahlulelwa…
rated impulse voltage: I-voltage esuselwe ku-voltage elinganiselwe kanye nesigaba sokugcwala ngokweqile komshini, obonisa amandla okumelana ashiwo okufakwayo kwawo ngokumelene no-overvoltage wesikhashana. Kwabaqalayo, akudingekile ngempela ukuqonda incazelo engokomzimba yale ncazelo. Ukusetshenziswa okuyinhloko kwaleli xabiso le-voltage esilinganisweni ukunquma inani elilinganiselwe lemvume; ngokubhekisela kuThebula 15, inani elilinganiselwe le-impulse voltage linganqunywa ngokuqondile.Umusho ophezulu weThebula le-15 ubonisa ukuthi “Imishini ikusigaba…
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