EN
Matsalatin da Ajiyayi: Inda Kafa Mai Amfani Ya Cire Sistemin na Solar
Gidan aikin mai amfani a yankin Spain ta kasar ya saba da 120 kW na kwayoyin na solar a cikin gida ta amfani da abubuwan da suka shirya daga mai bayani na elektriko. Uku watan bayan ya faru, sistemu ya cire a lokacin da aka fi kuma yanka. Mai bayani ya gano matsala a cikin abin da ke kafa: kafa mai amfani na AC ya shirya inda kafa mai amfani na DC ne ya kamata su shirya. pv circuit breaker kafa na PV
Abin da Ya Faru a cikin kwayoyin na 600V a cikin gida
Tsarin ya yi amfani da jerin igiyoyi guda biyu da ke kaiwa ga ƙarfin lantarki a kusa da 600 V DC. A wannan ƙarfin lantarki, mai yankewa na AC na yau da kullun ba zai iya kawar da kuskure ba saboda ƙarancin ƙetare na yanzu wanda ke taimakawa kashe baka na AC ba ya faruwa. Na'urar ta yi zafi sosai, ta rasa iyawar ta, kuma ta kashe kariya ga dukan igiya. Injiniyoyin filin Hongxin AIOT da suka sake nazarin shafin sun lura cewa akwatin haɗin haɗin ba shi da wani keɓewa na DC ko na'urar ƙetare-ƙetare.
Lokacin da mai aiki ya kashe kusan makonni biyu na samar da wutar lantarki a lokacin lokacin rani. Gano matsalar ya dauki ziyarar gida uku saboda mai katse AC bai bayar da wani tarihin taron ba kuma babu matsayi mai nisa. Wannan kwarewar ta tabbatar da mai shi don buƙatar kariya ta DC da kuma kula da igiyoyi na asali a kan kowane rufin da zai kasance, wani tsari da aka gani a cikin yawancin gazawar da aka yi a lokacin da aka fara shigar da wutar lantarki kamar yadda aka saba da ginin ginin.
Yadda DC Arcing ya bambanta daga AC Faults
Kudin kamar yadda aminci na alternating current (AC) ya ƙare da zero 100 ko 120 kafin sa’a, wanda ke baiwa circuit breaker fassara mai sauƙi don gudanar da arc. Kudin kamar yadda aminci na direct current (DC) ba shi da wani baya kamar haka. pv circuit breaker ya kamata ya zama aiki don gudanar da arc a cikin chamba mai tsawo da mafi kyau da yawa kuma ya rarraba shi don gudanar da shi. Wannan farko na farko na aiki ne wanda ke nufin cewa an jin substituting AC part shine yana iya kare wa matsala na alamu kuma ba tushen kuskuren da yawa ba.
Takon Alamu: Me kuma Photovoltaic Circuits suna bukatar alamu mai tsari
Photovoltaic circuits suna da alamu na yawa wanda ba su da kudin kamar yadda aminci na gida ba. Fasahar wannan alamu shine farko na yadda ake shirya don samun alamu mai tsari.
Kudin kamar yadda aminci na gaba daya kuma kudin kamar yadda aminci na gaba daya na string
Idan string daya a cikin kudin kamar yadda aminci na parallel ya gaskiya ko ya dace da shadow, string na gaba daya zai iya kara kudin kamar yadda aminci na gaba daya a cikin kudin kamar yadda aminci na gaba daya ta hanyar string na gaba daya. Ba a da DC-rated pv circuit breaker ko diode isolation, wannan kudin kamar yadda aminci na gaba daya zai kare kudin kamar yadda aminci na gaba daya da kudin kamar yadda aminci na gaba daya kuma zai kare kudin kamar yadda aminci na gaba daya. Alamu na gaba daya zai iya kare kudin kamar yadda aminci na gaba daya kuma zai iya kare kudin kamar yadda aminci na gaba daya kuma zai iya kare kudin kamar yadda aminci na gaba daya.
Arc Fault Wanda Standard Breakers Ba su karanta
Kurutu na sarakunan kuma suka hada da yadda kwayoyin su ke gudan, ko kwayoyin su ke tsofowa don fuskantar da sauran kwayoyi. Wadannan kurutu suna ci gaba daya na amfanin kwayoyin su, amma suna samun abin da zai iya shiga wajen tsanani. Kamar yadda NEC Article 690 ya bayyana, kuma yana nufin amfani da alama na kurutu na photovoltaic don dukkanin sistemai.
Mataimakin da ake ciki na farko yana samun halin da suka faru kafin kwayoyin su suka tsofowa. Amfani da alama na tsanani a lokacin da aka gudan kuma yana taimaka, amma kuma yana fi kyau kada su faru kafin su faru. Yadda aka rubuta kwayon PV da AFCI mai zuwa a cikin kwayon da suka faru, kuma ba a yi amfani da kwayon mafi yawa da suka faru kafin su faru kafin su faru.
Tashin teknikal da standarun da suka haɗa da kwayon PV
Yi amfani da abin da ke ciki yana nufin karanta lambobi na elektrisiti da standarun da suka haɗa da su kuma.
DC Rating, Ƙarfafin 1.56, da AFCI Logic
Maki pv circuit breaker yana da DC voltage rating wanda ke fi ƙarshen voltage na string, ba ta yin amfani da nominal value. Amsa mai zuwa kuma yana amfani da 1.56 safety factor don gano open-circuit voltage don tabbatar da cold-temperature gains. Amsa na zaman lafiya sun daga AFCI logic wanda suka samun current waveform, suka nuna erratic signature na arc, kuma suka buƙata circuit a cikin milliseconds. Hongxin AIOT units sun bayyana both the rated DC breaking capacity da AFCI response time don haka designers zasu iya tabbatar da margin.
IEC 62109, IEC 60947-2, NEC 690, UL 1741
Duna muhimmi na biyu sun daga cikin specification. IEC 62109 ya kawo safety na power converters don photovoltaic systems. IEC 60947-2 ya bayyana circuit-breaker performance don low-voltage switchgear, wanda ke kara DC variants. A North America, UL 1741 ya list inverters da associated equipment, yayin da NEC Article 690 ya sanya installation rules. A pv circuit breaker wanda aka rufe don export yana bukatar amfani da evidence na relevant certification ba ta yin amfani da generic AC mark.
Fasahar da kariya suna da mahimmanci don hanyar amfani da test din. Wani shahada mai kyau yana nuna modelin da ake amfani da ita, DC breaking capacity, da jama'ar da suka sertifiƙo. Hongxin AIOT yana aiki da records na kuli batch don haka wani pv circuit breaker da aka saita a wani bango zai iya tattara da same file a shekara biyu da suka zuwa bayan insurance ko resale review.
Zaɓi, Tattaunawa da Gudanarwa na Kuma Ayyukan Da Ake Amfani Da Su
Kwamfutu na muhimmanci kuma zai gudanar da system kamar yadda ya kamata idan suka zaɓe, saita da gudanar da su da kariya.
Yadda Ake Zaɓe PV Circuit Breaker Da Ya Fi Kullum
Kammala device da DC voltage na string da kalmomi na array, sannan zaɓa 1.56 margin. Tabbata ku cewa akwai true DC breaking rating, kuma don dukkanin gida na yawa, akwai integrated AFCI. Zaɓa daga abokan da suka bayar test reports; Hongxin AIOT ta ba da IEC da UL documentation ta hanyar kuli model don haka procurement teams zasu iya tabbatar da customs da inspections baya aikin da suka zuwa.
Tattaunawar Da Su Zai Gudanar Da Array Don Aminci
Ka duba akwatunan haɗin kowane wata shida don zafi, canza launi, ko kuma ƙarancin ƙwanƙwasawa a kan tashoshi. Tabbatar cewa ware switches ne DC-rated da kuma cewa da pv circuit breaker har yanzu danna m zuwa kashe matsayi. Sauya duk wani na'urar da ta yi tuntuɓe a ƙarƙashin kuskure fiye da sau biyu, saboda lambobin sadarwa na ciki sun lalace bayan kowane taron.
Ka rubuta shafi ɗaya a kowane shafi, ka rubuta dukan tafiye-tafiye da yanayin da ke wurin da kake. Yanayin da ake samu a cikin yawan tafiye-tafiye ya nuna cewa mai haɗawa yana lalata kafin ya gaza. Mai yanke wutar lantarki wanda ya sake yin aiki a karkashin nauyin da ya dace ya cancanci bincike na asali, ba kawai sake saitawa da bege ba.
Masu Sabon Gaskiya
Tambaya: Shin mai katse AC na al'ada zai iya kare igiyar hasken rana?
Matsayin AC na karami ba za a iya gudan cewa ya tsaya da mafi kyau don gudan abin da ke daga DC saboda direct current ba da zero-crossing wanda ke taimaka wajen gudan arc na AC. A 600 V DC, kusurun ba za su iya gudan kuma zasu bari hanyar gudan. Ana bukatar matsayin pv na karami wanda yana da DC breaking rating da kamar da arc-quenching chamber don photovoltaic strings.
Tambaya: Wane voltage rating ne matsayin pv ya kamata su yana da shi?
Abin da aka saba yana da yawa ga string's maximum possible open-circuit voltage, ba ta hanyar nominal panel rating. Kullum inginiyaran suna amfani da cold-temperature open-circuit voltage da 1.56 safety factor kuma suna zaune matsayin da ke cikin yawa ga wannan nisba. Wannan margin yana kare matsayin don zama da stress a lokacin rana na winter inda voltage yana tace.
Tambaya: Ya kamata kuma arc-fault protection don photovoltaic systems?
A cikin yawancin cibiyoyin Arewacin Amirka, NEC Mataki na 690 ya buƙaci kariya ta lantarki na lantarki a kan wasu kewayon DC. Ko da a inda ba a ba da umarni ba, AFCI logic yana gano sa hannun halin yanzu na mai haɗawa kafin ya ƙone. Bayyana mai yanke wutar lantarki tare da hadadden AFCI yana rage hadarin gobara a manyan rufin ko kuma da wuya a samu.
Tambaya: Sau nawa ne ya kamata a duba masu fasa akwatin haɗin?
Idan aka bincika yanayin jikin mutum a cikin wata shida, za a iya gano yawancin matsalolin da wuri. Ka nemi abin da ke cikin gidan da yake da ɗumi, ko kuma wanda ya ɓace launinsa. Duk wani mai yanke wutar lantarki wanda ya katse matsala fiye da sau biyu ya kamata a maye gurbinsa, saboda lambobin sadarwa na ciki sun rasa ikon tsaftacewa bayan maimaita abubuwan da suka faru.
Tambaya: Waɗanne ƙa'idodi ne suka tabbatar da cewa mai yanke kewayawa yana da kyau?
IEC 60947-2 yana kawo tsarin amfani na low-voltage circuit-breaker, wanda ke kara DC types, amma IEC 62109 yana kawo aminci na photovoltaic system. A Amurka, UL 1741 da NEC Article 690 suna amfani. Masu sanya su ya ba mu shahadatun na test wanda suka nuna wannan standardai, ba su ya ba mu markar amfani na AC mai zuwa ga kowane.
Tambaya: Me ya sa ka zaune akan masu sanya wanda suka bayar da dukkan bayanan?
Masu gudumta, masu bincike na baya da masu bincike na elektrisiti suna bukata shahadatun da aka tabbatar da su kafin yau. Masu sanya kamar Hongxin AIOT wanda suka bayar da IEC da UL test reports a kowane pv circuit breaker yana taimaka wajen kariya ta hanyar bincike ba tare da canza kuma yana baiwa mutumin da aka samu shahadatun da ke da ala'ida na kariya.