Ya sa MCCB ya ƙara ayyukan kariya?

Ayyukan kariya na MCCB na gaba — Wani karamin tsawo

Wani karamin tsawo na karamin tsawo na karamin tsawo — wani mCCB ta kawo a cikin IEC 60947-2 — ya sa kofin yin amfani da biyayen da suka daga biyu. Amfani da kofin don gudanin yanzu ya yi amfani da kofin da ke cika yanzu wanda ya ci gaba da yanzu da ya taimaka a cikin tsari na yanzu. Amfani da kofin don gudanin yanzu ya yi amfani da kofin da ke cika yanzu wanda ya ci gaba da yanzu da ya taimaka a cikin tsari na yanzu. Amfani da kofin don gudanin yanzu ya yi amfani da kofin da ke cika yanzu wanda ya ci gaba da yanzu da ya taimaka a cikin tsari na yanzu. Wannan tsarin thermal-magnetic shi ne mafi kyawun kuma ba za a iya amfani da shi don gudanin yanzu, kuma ba za a iya amfani da shi don gudanin yanzu, kuma ba za a iya amfani da shi don gudanin yanzu, kuma ba za a iya amfani da shi don gudanin yanzu — wadannan suna bukata kofin da suka daga gaba.

Gudanin Yanzu, Gudanin Yanzu, da Tsarin Thermal-Magnetic

Alamar mCCB yadda na ƙarfi na kuma yadda na hanyar jiki suna amfani da biyu na wadannan hanyoyi. Yadda na jiki — wani kwayar bimetallic wanda aka sauya da tsari na load — ya gudun cikin yadda na I²t, wanda ke nuna sauyin kwayar kable. A 1.45× na bayani, breaker dole ne ya gudun a cikin da farko na sa’a ta IEC 60947-2. Yadda na kuma ya gudun tare da sa’i (a cikin 20 ms) idan tsari ya fi kwayar gudun. Wanda wannan ba za suwa ba: gano leakage na 30 mA, gudun a lokacin da tsarin kuma ya fi daga 70%, ko zama a matsayin signal na BMS na farin ciki.

Matsaloli na Al'ada — Kullum Mabuɗan Na Gudun Kuma Ya Ci Gudun Na Leakage Na Earth A Cikin MCCB Suya

Wani mabuɗan na elektronikin da yawa a Eastern Europe ya samu talatin gudun na kuskure na main incomer mCCB fiye da watanni shida. Binciken ya gano batun zuwa ga ɓarkewar ƙasa ɓarkewar inji na mutum 8 zuwa 15 mA a cikin injuna 40 da aka haɗa zuwa 400 + mA, yana ƙaruwa sama da ƙofar 500 mA na mai shigowa a lokacin yanayin zafi. Maganin, wanda aka tsara tare da HONGXINAIOT (Xiamen Hongxin Intelligent Technology), wani kamfani mai fasaha mai zurfi tare da shekaru 24 na kwarewar rarraba wutar lantarki na kamfanin iyaye, ya sake gyara reshe-circuit mCCB raka'a tare da ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan An daina yin tafiye-tafiye da ke sa mutane baƙin ciki. Kulawa a matakin reshe ya ba wa ƙungiyoyin kulawa damar gano ƙarancin ɓarkewa kafin ƙaddamar da canza katsewa zuwa aikin kulawa da aka tsara.

Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin Ƙarin

Shunt Trip, Sakamakon Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙasa, Ƙarƙashin Ƙasa, da Kariya ta Motar

Na zamani mCCB ya zama mai iya gano shiga na hudu kategori na module na ajiye add-on ba tare ya sa wani breaker. Shunt trip release — ya ƙara yadda da kuma sigina na tsarin alama na hanyar fire alarm panel, emergency stop button, ko relay na BMS — ya ci gaban breaker ta hanyar farin ciki a cikin 50 ms bayan ya samu sigina. Undervoltage release (UVR) ya ci gaban breaker lokacin da voltage na supply ya dace kuma a cikin 70% zuwa 35% na nominal kuma ya bawa yadda da kuma a cikin 85% kafin ya dace kuma a cikin 85%, yana neman motor daga yanci ko yanci a cikin load. Module na earth-leakage ta hanyar core-balance current transformer (CBCT) na gaba daya yana gano residual current a cikin 30 mA don amfani na mutum ko 100 mA zuwa 30 A don amfani na ayyuka, yana kawo RCD functionality zuwa standard breaker. Module na motor protection yana kawo phase-loss da phase-unbalance detection — wanda ke muna kai tsari don circuit na motor na uku-phase inda single-phasing yana sanya windings a cikin minti.

Electronic Trip Units — Programmability da Communication

Kurba na Tsawo da Zane, Tsinkin Na Bayani, da Kuma Ingantin Modbus/Fieldbus

Wani tsinkin elektroniki ya saita tsayin kuma-karfi na gaba da wani mCCB da tsinkin na tsawo mai amfani da microprocessor. Alama na fahimta suna uku. Kurba na tsawo da zane — tsawo na gaba daga 0.4 zuwa 1.0× na karfi na bayani, tsawo na yanzu daga 1.5 zuwa 10×, tsawo na yanzu daga 2 zuwa 15× — suka bada damar tsawo na tsawo a cikin kowane tsawo na breaker ta hanyar saita na tsawo ba tare da saita na hardware na gaba. Tsinkin na bayani — tsinkin na tsawo yana rubutawa karfi da lokacin bayanin 5 zuwa 10 na bayanin tsawo, don haka yana rubutawa karfin kowane kishin da nemo na tsawo (tsawo na karfi, tsawo na kishin, tsawo na gida) — yana bawa bayani na tsawo don fahimta sabon sabonin bayani bayan tsawo. Kuma inganta — Modbus RTU, Modbus TCP, ko Profibus interfaces — yana kuma inganta breaker a cikin SCADA na kasuwa ko sistema na tsawo na karfi don tsawo na karfi na yanzu, tsawo na karfi na bayani, da amarar tsawo/saita na yanzu. Wani mCCB ta hana da electronic trip unit da communication module zai zama power-quality sensor, ba kuma protection device ce.

Gudunmawa na MCCB wanda aka amfani da shi a cikin al'ada

Gidan kantin, kantin motor na industriya, da sistemai na energy na gaba

Kantin na gida na kantin — akwai mCCB kantin na sub-distribution board wanda ya taimaka lighting da socket circuits yana buƙatar earth-leakage module da aka saita zuwa 300 mA don kantin na fire a matsayin IEC 60364. Kantin na motor na industriya — breaker wanda ya taimaka 30 kW pump motor yana buƙatar motor protection module wanda yana da phase-loss detection da undervoltage release don haɗa kuma restart automatic a bayan brownout. Sistemai na energy na gaba — solar inverter AC combiner boxes suna buƙatar breakers wanda suka dace da bidirectional current flow da elevated ambient temperature (50°C zuwa 60°C a cikin inverter enclosure) da appropriate derating. HONGXINAIOT ta ba solushonai na power distribution wanda aka amfani da su a cikin al'ada — domin mCCB karama na karama da karama na add-on module na amfani mai zuwa — don duniya ta yanzu da karama na al'ada na yankin da suka shiga.

Masu Sabon Gaskiya

Ya iya MCCB ya gano fittadi na ƙasa?

Karama na al'ada mCCB ba ya gano fittadi na ƙasa. Kada karama na fittadi na ƙasa da karama na external core-balance current transformer zai iya gano fittadi na baki daga 30 mA zuwa 30 A, tare da karama da aka zaɓe. HONGXINAIOT ya ba karama na add-on da ke da aiki.

Shi ne farko bayanin shunt trip da undervoltage release?

Shunt trip a cikin mCCB ya ci gaba ga breaker lokacin da ya samu signal na voltage na ƙasa — an yi amfani da shi don kuma da fire alarm da emergency stop. Undervoltage release ya ci gaba lokacin da voltage na supply ya ƙara kara kuma ya tsaya da yawa har abin da voltage ya sanya — an yi amfani da shi don kuma da motor protection.

Ya iya MCCB ya talki da building management system?

Ee. Akwai mCCB tare da na'urar tafiye-tafiye ta lantarki da Modbus RTU / TCP ko Profibus sadarwa na sadarwa yana watsa ainihin lokacin halin yanzu, ƙarfin lantarki, iko, da kuma kuskuren bayanai zuwa tsarin BMS ko SCADA don kulawa da nesa da kuma sarrafa makamashi.

Wani add-on protection wane ne bukatar suka kare motor circuit MCCB?

Motor circuit mCCB ya kamata yin amfani da phase-loss da phase-unbalance detection, kuma undervoltage release don hana brownout restart, kuma yana iya amfani da earth-leakage module ta hanyar optional. Standard thermal-magnetic trip unit alone ba ya dace ba don motor protection.

Yaya za a gudanen protection tsakanin maza MCCB?

Protection coordination tsakanin mCCB units yana amfani da time-current curve analysis — downstream breaker ya kamata ya cuta kafin upstream breaker don kowace fault current a cikin zone na ya.

Za a iya amfani da MCCB a solar PV system?

Ee. Akwai mCCB a cikin solar PV AC combiner box zai kamata ya kasance da rating don bidirectional current, ya kasance da derated don 50°C zuwa 60°C ambient temperature a cikin enclosure, kuma ya zabi da DC voltage rating mai kyau idan a amfani da shi a cikin DC side. HONGXINAIOT ta ba da breaker configurations na application-specific.