Wane ayyukan tsaro suwa dole ne MV switchgear ya yi?

Abubuwan Zama da Koyaushekan Tattalin Arziki a Cikin Sistemin MV Switchgear

Bayyana Switchgear na Voltage Mai Tsananin Nisa da Kontin Ayyukansa

Ayyukan switchgear na MV a tsaki da 1 kV zuwa 38 kV, yin amfani da tallafin elektriku yayin warkasoshin kuskuren cikin kasuwanci da shagunan kuɗi, wasu sistemi suna kare kayan aikata suka fi yawa kamar trafufo, mota, da fayida, yana aiki a juyawa mai girma inda rashin aiki zai iya haɗawa da rashin kuɗi.

Abubuwan Zama Masu Lahira: Zurfi Elektiriku da Kuskure Kan Daidaitawa a Cikin Sistemin MV

Zaɓuɓɓan kasko na elektric na tsarin MV sun godiya dari 50 mA—a yanzu mai haifi—amintattun zaɓuɓɓan cikin baka su yi 80% na alajiji na elektric (NFPA 2023). Zaɓuɓɓan abubuwa da ba su amincewar tauna bisa samar da hankali da dangane da 14 kg na TNT yayin ƙaramin baka na 15 kV (IEEE 1584), wanda ya nuna bukatar adadin amincewa masu taimako.

Rawar Masu Tsayin Amincewa na Yau Da Kuma Kayan Aikin Kariya Wajen Kare wa Zaɓuɓɓan

Alabbarin da suka sha IEC 62271-1 da ANSI C37.20.1 suna buƙatar yanke ajiyar dielectric testing kuma suna nuna iyaka na kuskuren kafin 0.1% kusa da shekara, waɗanda ke taimakawa wajen dawo da kayan batutuwa kamar abubuwan da suka faru a refinery na Texas a shekarar 2022 wacce ya kamata ta zama ba a yi test ba ne zuwa busbar connections.

Zunan Tsaro na Yin Aiki: Insulation, Segregation, da Interlocking

Mukuƙuƙun uku suna gudurar tsaro na MV switchgear:

1. Tasirin kasance : Abubuwan da aka iya amfani da su dole ne su karɓe 200% na voltage (IEC 62271-200)
2. Segregation : Garkokon hanyana suna ƙare faɗin kuskure a cikin alakari
3. Interlocking : Kunci mai lafiya suna dawo da shiga cikin sharuɗɗan masauyi lokacin yin aiki

Switchgear mai tsarin maki, mai insulation na gas, an samo lafiya a cikin reduce arc flash energy ta 65% dibu da wadanda aka amfani da su sabuwa mai insulation na air, kamar ma'aikatattun bincike na sarrafa.

Mukuƙuƙun Alabar Amurka Babba: NFPA 70E, OSHA, da NEC Compliance

NFPA 70E: Taimakon Kariya a Makaranta da Ayyukan Gini da Zarin Gini

NFPA 70E-2021 ya wakilci ayyukan gini da zarin gini kowace shekara ga wasanin da ke sama da 240V, inda zangin gini ya tafi 40 cal/cm² a cikin 18% na wasanin MV. Sababa nin hadin 2023 suna bukata hududun taimako da aka furta—masu tsawon 4 zuwa 12 fita bisa daya da shafin voltage—don duk wasanin MV.

Ilimi na Arc Flash da Buƙatar PPE don Aiki kan MV Switchgear

Sabon yanayin OSHA na 2021 suna bukata ilimin arc flash masu dubu da nuna:

• Yawan zangin gini (1.2—100+ cal/cm²)
• PPE Categories da ake buƙata (1—4 bisa ASTM F1506)
• Hududun karo da aka kiyaye

Don aiki mai yawa kan MV switchgear da ke sama da 1 kV, PPE Categories 4 da aka ambaci ta 40+ cal/cm² ita ce kyauta. Amfani da ilimi mai kyau yana kama injuria na arc flash ta 72% a cikin al’adu, saboda Tabbatarwa na Injuria a Makaranta na NFPA na 2024.

OSHA 1910 Subpart S da NEC Article 110: Sauƙi, Hududun Daidaitowa, da Buƙatar Gyara

Alabbarin kaijiya na Aminciyar Najeriya sun hada shawarar da aka yi wajen canzawa kan MV:

Ana buƙatar yin testin dielectric kowace 3—5 shekara don wasan MV a cikin ma'ambutattun yanayi ne kafin duka alabbarin.

Haɗinwa zuwa NEMA SG-4 don MV Controllers da kauyen kanunon Nazuƙi

Gyarawa na NEMA SG-4 na 2022 yana tare da haɗinwa na design na controller na motor na MV zuwa NFPA 70E, wanda ya neman:

• insulation mai ambali na 150% don tsarin 5 kV
• Tsarin kwancewa ta atomatik don banki na capacitor
• Tabbatar da voltage biyu (abubuwan testa na 120V/480V)

Wannan yana tabbatarwa ingancin kauye na wasan kasuwanci ta OSHA a cikin 29 CFR 1910.303 da kayan dabbobi na NEC. Babban iya tasiri kamar haka suna buƙe canjin NEMA SG-4 don wasan UL an listenshi su a cikin alakar ruwa.

Kayan Dabbobi na Ilimi da ANSI/IEEE don Design na MV Switchgear

IEC 62271-1 da IEC 62271-200: Kayan Dabbobi na Umma da Switchgear masu Ƙasa mai Ƙasa

Sarisar IEC 62271 yana sanya maɓallin duniya, tare da IEC 62271-1 taura abubuwan testa da IEC 62271-200 nuna bukukuwa don tsarin mai nuni na metal zuwa 52 kV. Waɗannan standard suna kiyaye kon yake gaban zaune mai jeri zangan kanso kuma suna buƙe testa na aiki—sune buƙe cimma su barabe da batun dabin cikin cikin 0.5 seconds ba tare da kuskure.

ANSI/IEEE C37.20.1 da C37.20.2: Ma'adinun Ida'awa don Switchgear mai nuni na Metal da mai nuni ta hanyar metal

Ayyukan North American suna magana da ANSI/IEEE C37.20.1 don switchgear mai nuni na metal da C37.20.2 don switchgear mai nuni ta hanyar metal. Waɗannan suna tunawa kan iko na earthquake (zuwa 0.5g) da iko na batun batu (40—63 kA ga 15 cycles). Tarihi na International Electrotechnical Commission a shekarar 2023 ya bada cewa 78% yin haɗa tsakanin ma'adinun IEC da ANSI/IEEE masu amintam, waɗanda ke kawar da saukin yin amfani bisa koma.

Tattaunawa na Design da Testa na Type Ta hanyar IEC da IEEE Protocols

Wasu makaranta na musamman suna tabbatar da inganci ta hanyar:

• IEC 62271-100 : Kariyar yanke a matsayin yanki na kuma tsakanin sauri
• IEEE C37.09 : Yanke na sakonar ta hanyar wayar gwiwa a lokacin da ke taimakawa sosai

An mustar ayyukan masu amfani suka kammala 14 kariyar yanke (IEC) ko 23 kariyar nemo (ANSI/IEEE), wanda ke kaptar tabbatar da takaitaccen yana cikin abubuwan da ke samun sauri.

Koyaushe Na Duniya Da Tsari Na Iƙaƙa Bayan IEC Da ANSI/IEEE

Daga cikin 63% na aluwalwanci sun amfani da kayan IEC don sarari mai nauyi (Abubuwan lura na EnergyGrid 2024), wasu aluwalwancin North American sun saba kuɗi da ANSI/IEEE don sadarwa na farko. Daga cikin wadannan wasu farko ne:

Akwai shawarwari na iƙwasar tare da alamar littafi dubu IEC/IEEE 62271-37-013 (2015), wacce ta kama 85% daga cotsuwar kariyar kogon kasa na masinin kari

Garin, Tatsuniya, da Tabbatar da Sauyin Ayyukan Masin Kari na Tsakiya

Garin Ma'addua: Matsin Ma'addua da Garin Matafin Taka (Hi-Pot)

Gwadawa da dielectric yana kiyaye ingancin gudumuwar tushen ta amfani da hanyoyin biyu. Gwadawa da ingancin tushen yana neman ruwa ko kontaminatsi ta hanyar megohmmeters, yayin gwadawa mai tsanani (hi-pot) yana amfani da 2.5x voltage na aikawa (misali, 42 kV don 10 kV systems) don tabbatar da tsauraran dielectric. Waɗannan gwada'awa suna taimakawa wajen daina katkwatton bayan zazzauyi ko canje-canje.

Gwada'awa Na Type vs. Gwada'awa Na Alkawari a Faburikar Switchgear da Gyara

Zabbun gwadawa suna biyuwa da rashin IEC 62271-1 masallaci; gwadawa na yauyukan yin nuna ingancin aikin. Alwasa da aka gudanar da shi suna buƙatar karin gwadawa idan wasu canje-canje ke tsoro kan saukin kulle ko dabi'uwan kuɗi.

Nunan UL da Taji NRTL don Tabbatar da Ayyukan Nazari

Wasu Makaranta ta Alama (NRTLs) tajiyan MV switchgear bisa zuwa ma'auni kamar UL 891 da OSHA 29 CFR 1910.303, wanda yake duba:

• Hanyoyin sauƙin kulle
• Tattalin arzikin da aka tsere (<1Ω alamuwar kuɗi)
• Izini na farance bisa ANSI/IEEE C37.20.1

Anoƙi dole ne suka sabunta kusan kowace 3—5 shekara ko bayan wasu gyara girma. Alwasa da aka tajiya suna kama da kuskuren 63% aƙalla darar darar alwasa ba a tajiyewa ba (NEMA 2023).

Amanin Aiki: Tattalin Arziki, Gudanawa, da Challon Gyara ‘Yan Uku

Hanyoyin Tattalin Arziki don Kare wa Yanzu Mai Inganci na Alwasa na MV

Tsaro mai kyau yana jawa waɗansu kayan aikin su sami kewaye na iya daga baya. Don aikin lokaci, kayan tsaro mai kyau suna da mahimmanci girma. Suna bukatar alamuwa da kwayoyin da aka kira ASTM F855 kuma kwayoyin da ba gudaunya ga aiki. A yanzu, yawa daga cikin kayan elektriku na yau da kullun suna da wurare na tsaro akan bayan. Wadannan suna da kwallon tsaro idan ba za a ba da damar wani ya karya kayan aiki har ta hanyar tsaro akwai. Kar a tsalli ma ayyukan lissafi. Kowace shekara, yi testin kufaffiya ne na'urar IEEE 80 domin ganin ilimin da ke sama da 5 ohms. Duba sabon rashin kuma, musamman idan kayan aiki taka cikin wuraren da ke mai ruwa inda mutum yana faruwa sosai. Sai kuma, bin gidan sadarwar sadarwa ba hanya ce ta kansa. Dabaran OSHA 1910.147 tana da dalilai masu hannun lokacin da kuke dealing with dangers of leftover energy.

Tattaunawar Lokaci Kowace Shekara da Ayyukan Tsaro Per Masu Iƙatin Nazari

Gudanarwa mai zuwa gabashin yawan shekara 15 zuwa 20 na switchgear kuma yana gudanar da abubuwan da ke taimakawa wajen daina abubuwan da ke shuka. Matsalolin da aka kira su ne:

• Tsari mai tsauraran infrared kowanne 24 kwanan wata don gano alamu
• Giniyar girma ta hanyar tafiyya a lokacin da ke tafiya don gano haɗuwa da ke kurawa
• Zauna mai amfani don wasuke sabon zaune don nuna waƙaɗi na ikolo

Albarkatu da ke biyan NFPA 70E yana bada farin ciki 40% babu tafiyoyin da ba a yarda ba. Alamar da ke iya bayyana batun baki (predictive tools) kamar sensa na partial discharge suna taimaka wajen samun iyaka 92% da ma'auni na NETA-MTS-2019, kamar yadda ya bayyana Raji’ar Gwamnati na 2023.

Amsawa zuwa Tsarin Kama da Makamashi Yayin da ke da iyaka da standaɗardan sauri na MV Switchgear

Fitar da 65% na sarayen MV a Najeriya sun karu 30 shekara, wanda ya kawo matsaloli a kauye da buƙatar sauri. Matsalolin da ke iya aiki sun hada da:

1. Sabon Siffa Na Ibi : Aiwatar da maboci mai ruwa zuwa SF6 ko nau’ikan vakuum a cikin takardun da ke wurin
2. Sabo Sabon Siffa : Sanya abubuwan da ke tsaye gaban kiralwa da saduruwar bude na ikojin da suka gabata zuwa shekarar 1980
3. Haɗin Kuyi na Cybersecurity : Naya gyara relays zuwa ga yau da kullun IEC 61850 masu ikojin tacewa

Gyara bisa babban yawa ya kusance shiriya ne a 34% dibup ne akan canzawa duka, sai dai kuma ta ba da damar bin alamar NEC Article 110.16 game da kiralwa, kamar yadda aka fada a raputa EPRI na 2024.

Saba Daga Sabon Wannan

Wane range na volta dole ya bar MV switchgear?

MV switchgear ya yi amfani da volta daga 1 kV zuwa 38 kV.

Wane abubuwan zurfi suna cikin tsarin MV switchgear?

Duk abubuwan zurfi sun hada da zurfin kiralwa da yawa karancin 50 mA da kiralwa, wanda ya ƙunya 80% na alajiji na kiralwa.

Wane alabbar suna muhimmiyar mahimmanci don MV switchgear?

Duk alabbar sun hada da IEC 62271-1, ANSI C37.20.1, NFPA 70E, da OSHA 1910 Subpart S.

Yaya za a iya kiyaye tsaro na MV switchgear a alakari?

Dole ne alakari su yi gargadiyar aiki masu zuwa, gwadawa na dielectric, da kuma tabbatar da ingantacciyar al’adu don reduce idanin dudun.