Zvikamu zvikuru zveindoor LED skriniuyekunze kwe LED kuratidza maLED uye machipisi emutyairi, ari emuunganidzwa wezvigadzirwa zvemagetsi. Iko kushanda kwemagetsi e LEDs inenge 5V, uye iyo yakawanda inoshandiswa ikozvino iri pasi pe20 mA. Hunhu hwayo hwekushanda hunoona kuti iri panjodzi zvakanyanya kune static magetsi uye abnormal voltage kana kuvhunduka kwazvino. Naizvozvo, vagadziri vekuratidzira kwe LED vanofanirwa kutora matanho ekudzivirira kuratidzwa kwe LED panguva yekugadzira uye kushandiswa. Iyo magetsi yekumisa ndiyo inonyanya kushandiswa nzira yekudzivirira kune akasiyana ma LED kuratidza.
Sei magetsi achifanira kudzimwa? Izvi zvakabatana nemaitiro ekushanda emagetsi ekushandura magetsi. Yedu LED inoratidzira switching power supply chishandiso chinoshandura AC 220V mains kuita yakagadzikana inobuda yeDC 5V DC simba kuburikidza nenhevedzano yenzira dzakadai sekusefa-kugadzirisa-pulse modulation-output rectification-filtering.
Kuti uone kugadzikana kweiyo AC/DC shanduko yemagetsi, mugadziri wemagetsi anobatanidza EMI sefa yedunhu kubva pawaya mhenyu kuenda kuwaya yepasi mudhizaini yedhizaini yeAC 220V yekuisa terminal zvinoenderana nenyika 3C inosungirwa. standard. Kuti ive nechokwadi chekugadzikana kweiyo AC 220V yekuisa, ese emagetsi achave nekubuda kwesefa panguva yekushanda, uye kubuda kwemagetsi ega ega kunosvika 3.5mA. Iyo leakage voltage inenge 110V.
Kana iyo LED inoratidzira skrini isina kudzika, iyo inodonha iripo haingokonzere kukuvara kwechip kana kupisa kwemwenje. Kana anopfuura makumi maviri emagetsi ekushandisa akashandiswa, iyo yakaunganidzwa leakage ikozvino inosvika kupfuura 70mA. Zvakakwana kuita kuti muchengeti wekudonha aite uye abvise magetsi. Ichi zvakare chikonzero nei yedu yekuratidzira skrini isingakwanise kushandisa leakage protector.
Kana iyo inodzivirira yekudonha isina kubatanidzwa uye iyo LED skrini yekuratidzira isina kudzika, iyo yekudonha ikozvino yakasimudzwa neiyo magetsi inodarika yakachengeteka ikozvino yemuviri wemunhu, uye voltage ye110V inokwana kukonzera rufu! Mushure mekugadzika, iyo magetsi emagetsi shell inoswedera pedyo ne0 kumuviri wemunhu. Zvinoratidza kuti hapana mutsauko unokwanisa pakati pesimba rekupa uye muviri wemunhu, uye iyo yekudonha ikozvino inotungamirwa pasi. Naizvozvo, kuratidzwa kwe LED kunofanirwa kuve kwakadzika.
Saka, iyo standard grounding inofanira kutaridzika sei? Pane materminal matatu panoperera magetsi, anove live wire terminal, neutral wire terminal uye ground terminal. Nzira chaiyo yekumisa nayo ndeye kushandisa waya yakakosha yero-girinhi bi-ruvara pakuisa pasi kuti ubatanidze materminal ese emagetsi munhevedzano wokiya, uye woaendesa kunze kune yepasi terminal.
Kana isu tadzika pasi, iyo yekumisa kumisa kunofanirwa kuve isingasviki 4 ohms kuve nechokwadi chekubuda panguva yekudonha kwezvino. Izvo zvinofanirwa kucherechedzwa kuti kana mheni yekudzivirira yepasi terminal inoburitsa mheni inorova ikozvino, zvinotora imwe nguva nekuda kwekupararira kwepasi ikozvino, uye kugona kwevhu kuchasimuka munguva pfupi. Kana iyo yekugadzika kweiyo LED skrini yekuratidzira yakabatana nemheni yekudzivirira yepasi terminal, ipapo iyo pasi inogona Kukwira kupfuura yekuratidzira skrini, mheni yazvino ichaendeswa kune chidzitiro chemuviri pamwe newaya yevhu, zvichikonzera kukuvara kwemidziyo. Naizvozvo, iyo inodzivirira yepasi yekuratidzira ye LED haifanirwe kubatanidzwa nemheni yekudzivirira yepasi terminal, uye inodzivirira yepasi terminal inofanira kunge iri kure nemamita makumi maviri kubva pamheni yekudzivirira yepasi terminal. Dzivirira pasi zvinogona kupikisa kurwisa.
Mhedzisiro yekutarisa kwekuisa kwe LED:
1. Imwe neimwe yemagetsi inofanirwa kuve yakadzika kubva pasi terminal uye yakavharwa.
2. Kuramba kwepasi hakuzove kwakakura kudarika 4Ω.
3. Iyo tambo yepasi inofanira kunge iri tambo yakasarudzika, uye inorambidzwa zvachose kubatana netambo isina kwayakarerekera.
4. Hapana air circuit breaker kana fuse ichaiswa pawaya yepasi.
5. Iyo tambo yepasi uye nzvimbo yepasi inofanira kunge inopfuura 20 kure nemheni yekudzivirira pasi terminal.
Izvo zvinorambidzwa zvachose kuti mimwe michina ishandise inodzivirira pasi panzvimbo yekudzivirira zero, zvichikonzera kusanganiswa kwekubatanidza kwekudzivirira kwepasi uye yekudzivirira zero. Kana kuvharwa kwemudziyo wekudzivirira kwepasi kwakakuvadzwa uye mutsara wechikamu unobata goko, mutsara usina kwawakarerekera uchange uine voltage kusvika pasi, kuitira kuti magetsi ane njodzi agadzirwe pagomba remudziyo wekudzivirira.
Nokudaro, mumutsara unoshandiswa nebhazi rimwe chete, chidziviriro chekudzivirira uye chekudzivirira zero chinongedzo hachigoni kusanganiswa, kureva kuti, chikamu chimwe chezvigadzirwa zvemagetsi hazvigoni kubatanidzwa kune zero uye chimwe chikamu chemagetsi emagetsi. Kazhinji, mains akabatana nekudzivirira zero, saka midziyo yemagetsi inoshandisa mains inofanirwa kubatana nekudzivirira zero.
Nguva yekutumira: Jul-11-2022
