Umuyoboro wizewe kandi ufite umutekano

Mubisanzwe, umubiri wumuntu urashobora kumva agaciro kubu ko gukangura ni mA 1.Iyo umubiri wumuntu unyuze 5 ~ 20mA, imitsi iragabanuka kandi iranyeganyega, kugirango umuntu adashobora gutandukana ninsinga.Ibicuruzwa byumuriro wamashanyarazi nigihe nigihe cyemewe nibihugu byinshi ni 30mA * S kurwanya umubiri wumuntu Mubisanzwe 1500 ohms ~ 300000 ohms, agaciro gasanzwe ni 1000 oms ~ 5000 ohm, agaciro gasabwa ni 1500 oms

Agaciro ka voltage yumutekano karashobora kuboneka mubitekerezo byumubiri wumuntu kurubu no kurwanya umubiri wumuntu: agaciro ka voltage umutekano mugihugu cyacu muri rusange ni 12 ~ 50V

Ihangane na voltage, kumeneka hamwe numutekano wimbaraga EMI muyunguruzi:

Umuvuduko n'umutekano

1. Niba capacitori ya Cx mumayunguruzo yamenetse, ihwanye numuzunguruko mugufi wa gride ya AC, byibuze bigatuma ibikoresho bihagarika akazi;niba Cy capacitor yamenetse,

Iringana no kongeramo voltage ya gride ya AC kumashanyarazi yibikoresho, bihungabanya umutekano wumuntu kandi bikagira ingaruka kubikoresho byose hamwe nicyuma nkicyerekezo.

Umutekano wumuzunguruko cyangwa ibikoresho, akenshi biganisha ku gutwika imirongo runaka cyangwa ibikoresho.

2. Bimwe mubipimo mpuzamahanga byumutekano birwanya umuvuduko ni ibi bikurikira:

Ubudage VDE0565.2 Ikizamini Cyumuvuduko mwinshi (AC) P, N kugeza E 1.5kV / 50Hz 1 min

Ubusuwisi SEV1055 Ikizamini Cyinshi Cyumuvuduko (AC) P, N kugeza E 2 * Un + 1.5kV / 50Hz 1 min

US UL1283 Ikigereranyo Cyinshi Cyamashanyarazi (AC) P, N kugeza E 1.0kV / 60Hz 1 min

Ubudage VDE0565.2 Ikizamini Cyumuvuduko mwinshi (DC) P kugeza N 4.3 * Un 1 min

Ubusuwisi SEV1055 Ikizamini Cyinshi Cyumuriro (DC) P kugeza N 4.3 * Un 1 min

US UL1283 Ikigereranyo Cyinshi Cyamashanyarazi (DC) P kugeza N 1.414kV umunota 1

vuga:

(1) Impamvu yo gukoresha voltage ya DC muri PN kwihanganira ikizamini cya voltage nuko ubushobozi bwa Cx ari bunini.Niba ikizamini cya AC cyakoreshejwe, ubushobozi bwubu busabwa na test ya voltage igerageza

Ninini cyane, bivamo ingano nini nigiciro kinini;iki kibazo ntikibaho mugihe DC ikoreshwa.Ariko kugirango uhindure AC ikora voltage mumashanyarazi ahwanye na DC ikora

Kurugero, amashanyarazi ntarengwa ya AC akora ni 250V (AC) = 250 * 2 * 1.414 = 707V (DC), bityo rero umutekano wa UL1283 ni

1414V (DC) = 707 * 2.

Corcom Corporation (USA) P, N kugeza E: 2250V (DC) kumunota umwe P kugeza N: 1450V (DC) kumunota umwe

Schaffner (Ubusuwisi) P, N kugeza E: 2000V (DC) kumunota umwe P kugeza N: Usibye kuri

Muyunguruzi yo mu gihugu imbere yabakora umwuga wo kwifashisha amategeko y’umutekano mu Budage cyangwa amategeko y’umutekano muri Amerika UL

Kumeneka nubu n'umutekano

Ubusanzwe uburyo bwa capacitor Cy ya buri kintu cyayunguruzo cyumuzingi gifite impera imwe yarangiye mugihe cyicyuma.Uhereye kubireba voltage igabana, icyuma gipima akayunguruzo gifite

1/2 cya voltage yagenwe, kubwibyo rero ukurikije umutekano, umuyaga uva (umuyoboro wa leakage) uva muyungurura ujya hasi unyuze kuri Cy ugomba kuba muto bishoboka.

bizabangamira umutekano wawe.

Amabwiriza y’umutekano y’ibicuruzwa biva mu bihugu bimwe na bimwe by’inganda ku isi ni ibi bikurikira:

Icyitonderwa: 1. Imiyoboro yamenetse ihwanye neza na voltage ya gride na grid frequency.Imiyoboro yamenetse ya 400Hz ya gride ya filteri yikubye inshuro 8 iyo gride ya 50Hz (ni

Akayunguruzo gahuza amabwiriza yumutekano mumashanyarazi yumurongo wumurongo ntushobora byanze bikunze kubahiriza amategeko yumutekano mumashanyarazi menshi)

2. Mugihe ugenzura imiyoboro yamenetse ya filteri, umuzenguruko wo gupima uhuye nubuziranenge mpuzamahanga ugomba gukoreshwa (nkuko bigaragara ku gishushanyo gikurikira).Iyo upimye, icyuma ntigishobora

Impamvu, igomba guhagarikwa.

Hagarika igishushanyo cya filteri yamenetse ikizamini cyikizamini:

Porogaramu

1: Ibikoresho byo murugo - kwihanganira ikizamini cya voltage ya firigo:

Gerageza kwihanganira voltage hagati yigice gitanga amashanyarazi nubutaka.Ibizamini: AC1500V, 60s.Ibisubizo by'ibizamini: nta gusenyuka na flashover.Kurinda umutekano: Ukoresha yambara uturindantoki, intebe yakazi yashyizwe hamwe nudukariso, kandi igikoresho gihagaze neza.Ubwiza bwa Operator: gukora imyitozo mbere yakazi, uzi neza ibikoresho, kandi irashobora kumenya no gukemura ibibazo byananiranye.

Ibikoresho bitemewe:RK2670 / 71/72/74 urukurikirane, gahunda igenzurwa na RK7100 / RK9910 / 20 ikurikirana.

Intego zo kugerageza

Kora amashanyarazi yibikoresho bifite ishingiro, kandi ugerageze kwihanganira voltage yibicuruzwa.

Inzira yo Kwipimisha

1.Huza umuyagankuba mwinshi wibikoresho kuri power yinjiza ya firigo ya firigo (LN ihujwe hamwe) kubice bya gride power.Ubutaka bwubutaka (garuka) bwigikoresho bwahujwe nubutaka bwa firigo.

2. Ibimenyesha byateganijwe byashyizweho ukurikije ibipimo byabakoresha.Shiraho igihe kugeza 60.

3. Tangira igikoresho, uhindure voltage kugirango werekane 1.5Kv, hanyuma usome agaciro kagezweho.Mugihe cyibizamini, igikoresho ntigifite impungenge zirenze urugero, byerekana ko imbaraga zihanganye zashize.Niba impuruza ibaye, ibicuruzwa bisuzumwa ko bitujuje ibisabwa.

Kwirinda

Ikizamini kimaze kurangira, imbaraga zigikoresho zigomba kuzimwa mbere yuko ibicuruzwa kandi umurongo wikizamini ushobora gufatwa kugirango wirinde imikorere mibi nimpanuka zumutekano.

2.Ikizamini kigezweho cyibikoresho byo murugo-imashini imesa

Imiterere yikizamini: Ukurikije inshuro 1.06 yumubyigano wakazi, gerageza agaciro kasohotse hagati yumuriro wamashanyarazi nubutaka burinda urusobe rwibizamini.Intego yikizamini: Niba ibice byicyuma byashyizwe ahagaragara bifite amashanyarazi adafite umutekano mugihe ibikoresho byamashanyarazi biri kugeragezwa bikora.

Ibisubizo by'ibizamini: soma agaciro kagezweho, niba karenze agaciro keza, igikoresho kizatabaza nijwi numucyo.Icyitonderwa cyumutekano: Mugihe cyikizamini, igikoresho na DUT birashobora kwishyurwa, kandi birabujijwe rwose kuyikoraho amaboko kugirango wirinde impanuka zamashanyarazi nimpanuka zumutekano.

Icyitegererezo:RK2675, RK9950Urukurikirane, ukurikije imbaraga zibicuruzwa byapimwe.Icyiciro kimwe ntigishobora kuva kuri 500VA-5000VA, naho ibyiciro bitatu niRK2675WT, ifite imirimo ibiri yicyiciro cya gatatu nicyiciro kimwe.

Intambwe yikizamini:

1: Igikoresho gikoreshwa, kandi amashanyarazi arahagaze neza.

2: Fungura amashanyarazi ahindura igikoresho, idirishya ryerekana ibikoresho bizamurika.Kanda buto / igenamigambi, hitamo urutonde rwa 2mA / 20mA, uhindure potentiometero PRE-ADJ, hanyuma ushireho impuruza.Noneho uzamure buto ya preset / ikizamini kugirango ugerageze leta.

3. voltage kugeza byibuze.

Icyitonderwa: Mugihe cyikizamini, ntukore ku gishishwa cyigikoresho na DUT.

Icya gatatu: ikizamini cyo kurwanya ubutaka

Ibizamini: ubu 25A, kurwanya munsi ya miliohms 100.Gerageza on-resistance hagati yubutaka bwinjiza ingufu hamwe nibyuma byerekanwe murubanza.

Ibikoresho bitemewe:Urukurikirane rwa RK2678XM (ubungubu 30/32/70 ampere itabishaka),RK7305 imashini igenzurwa na mashini,RK9930 urukurikirane (30/40/60 ampere itabishaka), gahunda igenzurwa na progaramu hamwe nibisohoka bya PLC, RS232, imikorere y'itumanaho RS485.