Nzira Yokusarudza Sei Chishandiso Chekudzivirira Chekukwira Kwechikamu Chimwe Chete Chakakodzera?

Nzira Yokusarudza Sei Chishandiso Chekudzivirira Chekukwira Kwechikamu Chimwe Chete Chakakodzera?

Ndakakangwa michina miviri yekofi neCNC controller yemadhora 3,800 ndisati ndabvuma kuti ndaisaziva kuti kukwira kwemvura kwacho kwakaita sei.

Ndinosarudza SPD yechikamu chimwe chete nekutarisa nhamba nhatu: max surge current (kA), voltage protection level (VPR), uye short-circuit rating (SCCR). Enzanisa idzodzo nehukuru hwe breaker yako uye load sensitivity, uye mudziyo uchararama kupfuura michina yaunodzivirira.

Ramba uchiverenga kana uchida firita imwe chete yandinoshandisa yemaminitsi matatu kuitira kuti ndisazombopedza nguva padatasheet risiri iro zvakare.

Kunzwisisa Simba reSingle Phase?

Ndaimbofunga kuti "single-phase" zvinoreva waya imwe chete kusvika ndafuridza fuse ndikaona waya mbiri pamwe nevhu mupanera.

Simba remagetsi rechikamu chimwe chete ndiro remagetsi maviri e230 V kana 120 V rinopa dzimba nezvitoro zvidiki zvekudya. Conductor imwe chete inopisa, imwe isina kusimba, uye sine wave inodzokororwa zvinokupa simba rese raunoda pamwenje, malaptop, uye ma lathe.

Nei chimiro chemafungu chichikosha

Wave ine simba remagetsi rinosvika pa325 V peak mu 230 V system. Surge inokwira pamusoro pe peak iyoyo uye inogona kusvika 600 V muma microseconds. Kana SPD yako ikapihwa 275 V RMS, inobvira nekukasika uye inobvisa pamusoro pe wave. Kana ukatora 420 V model nekuti yakachipa, surge inozopinda zvakananga muVFD yako. Ndinochengeta pocket oscilloscope mubhokisi rangu rezvishandiso; kutarisa kamwe chete wave yakachekwa kunondiudza kana ndakasarudza kirasi yevoltage yakakodzera.

Tafura 1: Mavoltage akajairika echikamu chimwe chete vs. kirasi yevoltage yeSPD inokurudzirwa

Chii Chinonzi Kudzivirirwa Kwekuwedzera Kwechikamu Chimwe Chete?

Ndakaudza mutengi wangu kuti chinodzivirira kukwira kwemagetsi chaingova chinhu chemagetsi chinoyevedza; akanditumira bhiri rekugadzirisa muchina wekucheka nelaser.

Mudziyo wekudzivirira surge wechikamu chimwe chete iyuniti diki inosungirirwa padivi pe breaker panel yako. Mukati, metal-oxide varistors (MOVs) kana machubhu egasi anotsausa magetsi akawandisa kuenda kupasi mumasekonzi asingasviki makumi maviri nemashanu, zvichichengetedza mutoro wako uri pasi pemagetsi anodzivirira.

Zvikamu zvaunogona kuona

Vhura bhokisi repurasitiki wobva wawana madhisiki matatu akaita semari. Iwayo ndiwo maMOV. Fuse yekupisa iri padivi pedhisiki rega rega; kana MOV ikanyanya kupisa, fuse inovhurika uye LED yegirini inodzima. Ndakambocheka imwe unit yakakundikana; waya yefuse yakanga yapera uye MOV yakanga yaita dema. Kuongorora ikoko kwakandibatsira kuti ndisaisezve protector yakafa.

Tafura 2: Zvikamu zvemukati uye chii chinozviuraya

Mudziyo wekudzivirira chirwere cheSingle Phase Surge (Single Phase SPD) unoshanda sei?

Ndakaona 40 kA ichirova pa logger yangu; voltage pa outlet yakakwira chete 90 V pachinzvimbo che1,200 V.

SPD inogara pakati pe-line-neutral uye line-earth. Kana surge yasvika, zvikamu zvayo zvemukati zvinoshanduka kuita low-impedance state mumasekonzi mashoma. Surge current inofamba nepakati peSPD, kwete neprinta yako, uye clamping voltage inoramba iri pasi pesero rekukuvara kwemutoro unorema.

Kukombama kwekubatanidza

MOV yega yega ine curve inoratidza voltage vs. current. Pa 1 mA MOV inotanga kuitisa; pa 1 kA voltage yakakwira ne50%. Ndinofukidza curve iyoyo pamusoro peCNC yangu. Kana CNC ikafa pa 800 V uye MOV ikarova 820 V pa 3 kA, ndinotamira kuMOV yakakura kana kuwedzera danho rechipiri. Handimbovimbi nekabhuku chete; ndinoronga mitsara miviri ndotsvaga mukaha.

Nheyo yeKudzivirira Kuvhiya Kwechikamu Chimwe Chete?

Ndaimbofunga kuti "pfungwa yekushanda" yaive yekushambadza zvinhu zvisina basa kusvika ndawana pfari yaisvetuka pablock yeterminal.

Pfungwa yekushanda kwayo ndeyekudonha kweimpedance. Pasi pemagetsi akajairwa, SPD inoita seyakavhurika. Kana simba rakawedzerwa, MOV inoputsika, yoita kuti simba ripfupike, yobva yaendesa simba pasi. Mushure mekunge simba rapera, MOV inotangazve yomirira kurova kunotevera.

Kugovana simba mukati meyuniti

Kukwira kwe20 kA hakugari paMOV imwe chete. Chishandiso ichi chinoshandisa maMOV matatu panguva imwe chete saka dhisiki rega rega rinodya chikamu chimwe muzvitatu. Kana MOV imwe ikakura nekukurumidza, resistance yayo inodzikira uye inoba magetsi akawanda, inopisa, uye fuse yekupisa inoiuraya. Kufa ikoko kwakanaka kunoita kuti mamwe maviri arambe ari mupenyu. Ndinogara ndichitarisa makodhi emazuva; maMOV kubva muzera rimwe chete nechiyero chimwe chete, saka makit angu ekutsiva ane zvitambi zvemazuva zvinoenderana.

Maitiro Ekuisa Chidziviriro Chekuwedzera Chechikamu Chimwe Chete?

Ndakamboisa SPD kumashure; LED yakaramba yakasvibira asi dziviriro yakanyangarika seutsi.

Dzima main breaker. Batanidza tambo yeSPD kudivi re breaker load, neutral ku neutral bar, uye ivhu ku earth bar. Chengeta ma leads ari mapfupi pane 30 cm, atenderedze pamwe chete, uye torque kusvika 2 Nm. Vhara panel, vhura, uye simbisa kuti mwenje yegirini ye LED yakadzikama.

Bvunzo rehurefu hwemalead randinoita pabasa rega rega

Ndinoshandisa jenareta rechiratidzo re1 MHz uye ndinocheka waya ye10 cm paSPD terminals. Kudonha kwevoltage kunopetwa kaviri pandinowedzera imwe 10 cm. Kuedza ikoko kunondiratidza kuti 30 cm ndiyo muganho wakaoma; centimeter imwe neimwe inowedzera inenge 40 V kune let-through. Kana panel yakazara, ndinoisa SPD pamusuwo ndoshandisa mhangura yakarukwa; chimiro chakati sandara chinocheka inductance nehafu.

Kushandiswa kweMadziviriro Ekuwedzera Kwechikamu Chimwe Chete Mubhizinesi Diki?

Bika remutengi wangu rakarasikirwa nemaovheni matatu panguva imwe chete; murume weinishuwarenzi akati "rombo rakaipa" kusvika tamuratidza SPD yakanyunguduka yatakagadzirisa mangwana acho.

MaSPD echikamu chimwe chete anodzivirira marejista emari, michina ye espresso, maCNC routers, uye maCCTV muzvitoro zvidiki. Anokwana mukati me rack ye1U kana kuti akarembera paDIN rail padivi pemita. Chigadziko chimwe che 20 kA chinochengetedza tambo yese yekubika ichimhanya munguva yekupisa.

Maitiro ekuisa zvikwata mumapoka andinoshandisa

Ndinoisa muchina wega wega uri pasi pe16 A ndouisa zita rekuti "sensitive" kana kuti "solid." Madhiraivha akaomarara akaita sePLC ane SPD imwe chete ne550 V VPR. Madhiraivha akaomarara akaita seheaters ari kumashure kweSPD yechipiri ine 650 V VPR. Kupatsanurwa kwacho kunoderedza mutengo nekuti modhi ye650 V yakachipa ne30%. Spreadsheet yangu inoratidza muridzi wemota kuchengetedza $210 uye nguva pfupi yekuendesa magetsi kubva kufekitori yedu yeWenzhou.

Mitemo Yekuisa Yaunofanira Kutevedzera Here?

Ndakambocheka makona ndikaita 50 cm leads nekuti DIN rail yairatidzika zvakanaka; muongorori akandimanikidza kuibvisa.

Tevedzera mitemo mina iyi: chengeta tambo dziri pasi pe30 cm, shandisa 16 mm² copper, wedzera 32 A breaker kumusoro, woisa SPD mushure memita asi usati washandisa RCD. Tevedzera kodhi yemuno: muGermany shandisa VDE 0100-443, muUK tevera BS 7671 534.

Tafura 3: Rondedzero yekukurumidza yandinopa vashandi vangu

Mhedziso

Sarudza nhamba, cheka malead, simbisa screws, uye SPD yako yechikamu chimwe chete ichafa saka michina yako haife.

Nditumirei tsamba pa caroline@leikexing.com kuti muwane mutengo wepeji rimwe chete uye tichakutumirai batch yenyu yakagadzirwa kubva kuWenzhou mumazuva gumi nemashanu anotevera.