OEM / ODM Earth Leakage Circuit Breaker Supplier

Kodi mukufunikira Zophwanya Zozungulira za Earth Leakage Circuit Breaker zapamwamba kwambiri komanso zolimba?CDADAimapereka mayankho okwanira a OEM. Monga wopanga odalirika ndi fakitale yathu, timapereka chitsimikizo cha zaka 3 pazogulitsa zathu.

Kodi Earth Leakage Circuit Breaker (CBR) ndi chiyani?

AnEarth Leakage Circuit Breaker (CBR), amadziwikanso kutiEarth Leakage Circuit Breaker yokhala ndi Integral Overcurrent Protection (CBR) pa IEC 60947-2 Annex B, ndi chipangizo chamakono chodzitetezera chotsika kwambiri chomwe chimaphatikizachitetezo chotsalira chapano (earth leakage). ndikuchulukirachulukira komanso chitetezo chafupipafupi mu gawo limodzi lopangidwa. Kugwira ntchito pamagetsi ovotera mpaka415V AC (50/60Hz) ndi mavoti apano kuchokera16A mpaka 800A, CBRs amagwira ntchito ngati zida zodzitchinjiriza pazogwiritsa ntchito mafakitale, zamalonda, komanso zofunikira kwambiri.

Mosiyana ndi standaloneOtsalira Pakalipano Ophwanya Ma Circuit (RCCBs)zomwe zimangopereka chitetezo chapadziko lapansi, ma CBR amaphatikiza:

Thermal-magnetic chitetezo kapena chamagetsi overcurrent chitetezo (L-S-I zokhota)

Kuzindikira kotsalira kwapano (kukhudzidwa kwa 10mA mpaka 1000mA)

Short-circuit kuswa mphamvu mpaka 85kA

Kuphatikiza uku kumathetsa kufunika kophatikizana kosiyana kwa MCB/RCCB, kuchepetsa malo oyika ndikuwongolera kudalirika kogwirizana.

Magulu Azinthu & Masanjidwe

Gulu	Mtundu	Mitundu Yamakono	Makhalidwe Ofunikira
Mtundu Wamakono Wotsalira	Mtundu AC	16A-800A	Imazindikira mafunde otsalira a sinusoidal AC okha, ntchito zongofuna zambiri
Mtundu Wamakono Wotsalira	Mtundu A	16A-800A	Imazindikira AC + pulsating DC (yokonzedwa AC), katundu wamakono wamagetsi
Sensitivity (IΔn)	Kumverera Kwambiri	10mA - 30mA	Chitetezo cha ogwira ntchito, malo azachipatala, malo onyowa
	Kumverera kwapakatikati	100mA - 300mA	Chitetezo chamoto, mafakitale ambiri
	Kumverera kwapansi	500mA - 1000mA	Kupewa moto pamakina otayira kwambiri, chitetezo chosankha
Kuchedwa Kwanthawi	Nthawi yomweyo	Mavoti onse	Cholinga cha General, <40ms pa 5×IΔn
Kuchedwa Kwanthawi	Kusankha (S-Type)	100mA - 1000mA	Kuyenda mochedwa (130-500ms pa 1 × IΔn), tsankho lamtunda
Pole Configuration	4 - Pansi	16A-800A	Magawo atatu + osalowerera ndale, osinthika osalowerera ndale (50-100%)
Kukwera	Zokhazikika	16A-800A	Kulumikiza mabasi mwachindunji, okwera mtengo

Kuthyola Makalasi:

Standard (N)25kA - 36kA (magawo ogawa)

Pamwamba (S)mphamvu: 50kA - 70kA (Mainjini apamwamba)

Kwambiri Kwambiri (H)mphamvu: 85kA (mphamvu zomangamanga)

Ntchito Zazikulu & Chitetezo

Integrated Chitetezo Ntchito

Ntchito	Kuzindikira Mfundo	Magawo aukadaulo
Chitetezo Chowonjezera (L)	Bimetallic thermal expansion kapena electronic RMS sensing	0.8 – 1.0 × Pokhazikitsa, poto wa nthawi yopingasa, ±10% kulondola
Kuchedwerako Kozungulira (S)	Nthawi yamagetsi kapena kuchedwa kwa maginito	2-10 × Mu, 0.1s - 0.5s kuchedwa, kusankha kugwirizana
Ulendo Wapompopompo (I)	Magnetic solenoid kapena zamagetsi nthawi yomweyo	5-20 × Mu, <20ms ntchito, malire panopa
Earth Leakage (G/Δ)	Core Balance Current Transformer (CBCT)	10mA - 1000mA IΔn, ± 10% kulondola kumva
Ground Fault (GF)	Vector sum current sensing	20-100% ya In, kuchedwa kwa 0.1s-1.0s, njira yosinthira pakati
Kudziyang'anira	Kufufuza kwa umphumphu wa dera lamkati	CBCT yopitilira ndi kuyang'anira koyilo yapaulendo, kutulutsa ma alarm

Tekinoloje Yotsalira Yamakono Yozindikira

TheCore Balance Current Transformer (CBCT) kapenaKusintha kwa Kusintha kwa Toroidal Transformer zimapanga chitetezo cha mtima wa kutayikira kwa nthaka:

Normal Operation: Ma conductor onse amoyo (gawo + osalowerera) amadutsa pachimake cha toroidal. Mafunde oyenda bwino amatulutsa mphamvu za maginito zotsutsana zomwe zimasiya kufika pa zero net flux—palibe mphamvu yachiwiri yochititsa .

Zolakwa: Pamene kutayikira kwa madzi kumayenda padziko lapansi (kupyolera mu kulephera kwa kutchinjiriza kapena kukhudzana ndi anthu), kusalinganika komweku kumapangitsa kuti pakhale maginito otsalira pakatikati pa toroidal core. Flux iyi imapangitsa kuti ma voliyumu azitha kuyenda mozunguliranso, ndikupangitsa kuti pakhale njira yolumikizirana kapena yamagetsi.

Makhalidwe a Ulendo pa IEC 61008/61009:

1 × Ine: Ulendo ≤ 300ms (nthawi yomweyo), ≤ 500ms (mtundu wa S)

2 × inen: Ulendo ≤ 150ms (nthawi yomweyo), ≤ 200ms (S-mtundu)

5 × ine: Ulendo ≤ 40ms (nthawi yomweyo), ≤ 150ms (S-mtundu)

Malo Ogwiritsira Ntchito & Milandu Yogwiritsa Ntchito

Gawo la Viwanda	Kugwiritsa Ntchito Mwachindunji	Zodziwika bwino
Ma Data Center	Kugawa kwakukulu, kudutsa kwa UPS, kutetezedwa kwa mabasi ophatikizana	250A-500A, Mtundu A, 300mA S-mtundu kusankha, 70kA Icu, kulankhulana
Zothandizira Zaumoyo	Kugawa kwakukulu kwachipatala, machitidwe azachipatala a IT, malo ochitira masewera olimbitsa thupi	100A-400A, Mtundu A, 10mA/30mA kukhudzika kwakukulu, kuyang'anira kudzipatula
Zomera Zopanga	Malo owongolera magalimoto, zida zowotcherera, zoyendetsa zosinthika	160A-500A, Mtundu B (kwa VFDs), 300mA, 50kA Icu, ulendo wamagetsi
Nyumba Zamalonda	Kugawa kwapamwamba, malo ogulitsira, ma eyapoti	125A-400A, Mtundu A, 100mA/300mA, 36kA Icu
Mafuta & Gasi / Marine	Mapulatifomu akunyanja, zida zobowola, makina oyendetsa sitima	250A-500A, Mtundu A, 500mA, tropicalized (T2), zosawononga dzimbiri

Njira Yopanga & Kupanga Ntchito

Njira Zopangira Zolondola

Raw Material IQC → Toroidal Transformer Production → Molded Case Fabrication → Contact System Assembly → Electronic Trip Unit Integration → Residual Current Module Calibration → Primary Assembly → Kuyesa Kwathunthu → Final QC → Packaging

Zovuta Zopanga Zopanga

Gawo	Tsatanetsatane wa Ndondomeko	Mfundo Zowongolera Ubwino
Kusintha kwa Toroidal Transformer Winding	Nanocrystalline kapena ferrite core yamphamvu kwambiri (µr> 10,000), kupindika molunjika kwa mafunde a pulayimale (kudutsa) ndi mafunde achiwiri (kuzindikira), kulowa mkati mwa vacuum	Kutsimikizika kokhotakhota kwa maginito, voteji yachiwiri pa 1 × IΔn ± 5%, kukana kwa insulation> 100MΩ
CBCT Integration	Kukwera kwa ma toroidal core mozungulira magawo onse / osalowerera ndale, kutchingira maginito akunja, kulumikizana ndi maulendo otumizirana matelefoni / zamagetsi	Kuyesa koyenera ndi 6 × Mu katundu (palibe ulendo wovutitsa), chitetezo chokwanira ku 3rd harmonics
Njira Zotsalira Zamakono Zaulendo	Sensitive polarized relay (5-50mW trip power) kapena choyambitsa chamagetsi cha MOSFET, kuphatikiza makina ku bar yapaulendo	Kutsimikizira mphamvu yaulendo, nthawi yoyankha <20ms, kukhazikika kwa kutentha -25°C mpaka +70°C
Kupanga Mlandu Wopangidwa	BMC thermosetting pulasitiki (DMC-2) jakisoni akamaumba, 150-180 ° C mankhwala, mkulu kutsatira kukana> 600V	Kulolera kwa dimensional ± 0.1mm, mphamvu ya dielectric> 15kV/mm, retardant flame UL 94 V-0
Main Contact Assembly	Zolumikizana ndi Silver-plated Copper (AgNi 90/10), mikono yopangidwa ndi CNC, yoyaka mumlengalenga wa nayitrogeni	Contact kukana <50μΩ, siliva makulidwe 8-12μm (XRF), kuuma HV 100-150
Electronic Trip Unit Programming	Kutetezedwa kwa Microprocessor-based LSIG+Δ, kuyika kwa fimuweya, kusanja kwa ma curve, kukhazikitsa protocol yolumikizirana	± 5% kulondola kwaposachedwa, ± 10% kulondola kwanthawi, kutsimikizira kwa ZSI (Zone Selective Interlocking)
Final Integration & Calibration	Assembly of thermal-magnetic or electronic trip system with residual current module, mechanical interlocking, handle mechanism	Kuphatikizika kopitilira muyeso + kutsimikizira kwaulendo wapadziko lapansi, dielectric kupirira 3kV/1min

Zida Zopangira Zoyambira & Zofotokozera Zazigawo

Chigawo	Kufotokozera Zinthu	Ma Supplier Standards	Zofunika Kwambiri
Toroidal Core (CBCT)	Nanocrystalline alloy (Finemet) kapena Mn-Zn ferrite (PC40)	IEC 60404-8, JIS C 2531	Kuthekera kwakukulu µr> 10,000, kukakamiza kutsika <2A/m, kachulukidwe kachulukidwe kachulukidwe > 1.2T
Sensing Coil Waya	Waya wamkuwa wa enameled (0.05-0.1mm), Kalasi F 155°C	IEC 60317	Magetsi owonongeka > 1kV, kusinthasintha > 10 × m'mimba mwake, 390 ° C
Ulendo Wopatsirana	Polarized latching relay, sensitivity 5-50mW	IEC 61810	Nthawi yoyankha <10ms, kukana koyilo 1-5kΩ, moyo wamakina> 10⁶ ntchito
Nyumba Zomangidwa Mlandu	BMC (Bulk Molding Compound) DMC-2, fiber fiber yolimbikitsidwa	IEC 60664-1, UL94 V-0	Mlozera wolondolera >600V, kukana kutentha 180°C, mphamvu yamphamvu>8 kJ/m²
Main Contacts	Electrolytic copper (Cu-ETP) + Silver-nickel plating (AgNi 90/10)	Chithunzi cha ASTM B152	Conductivity ≥100% IACS, kukana kukokoloka kwa arc, anti-welding properties
Bimetallic Elements	Inconel/passivated steel composite (ASTM TM2)	Chithunzi cha ASTM B388	Mlingo wopotoka 0.15-0.25mm/°C, kukhazikika kwanthawi yayitali ± 3%, kukana kukwawa
Zida Zamagetsi	Ma PCB amtundu wa mafakitale, masensa a Hall-effect, ARM Cortex-M4 processors	IEC 60721-3-3, IEC 61000	Kutentha kwa ntchito -25 ° C mpaka +70 ° C, EMC chitetezo chokwanira Level 4, SIL 2 yokhoza
Pokwerera	T2 mkuwa (C11000) yokhala ndi malata (8-12μm)	ASTM B187/B16	Kachulukidwe kakali pano 1.2-1.5 A/mm², torque kupirira 5-15Nm, kukana dzimbiri
Njira Yogwirira Ntchito	Chitsulo cha Spring (SWOSC-V) kapena chitsulo chosapanga dzimbiri (301)	Chithunzi cha JIS G3560	Moyo wotopa> kuzungulira kwa 20,000, kulimba kwamphamvu 1800-2000MPa, kupumula <5%

Miyezo Yogwirizana ndi Mayeso

International Standards Framework

Standard	Mbali	Mavoti Oyenera
IEC 60947-2 Zowonjezera B	Zowononga zozungulira zophatikizira zotsalira zapano (CBR)	Industrial CBRs> 80A, chitetezo chokwanira
EN 60947-2	IEC 60947-2 yolumikizidwa ku Europe	Chizindikiro cha CE, kutsata msika wa EU
GB/T 14048.2	Zofanana ndi dziko la China	Chitsimikizo cha CCC, msika waku China

Mayeso amtundu wovomerezeka (IEC 60947-2 + Annex B)

Gulu Loyesa	Mayeso enieni	Zoyenera Kuvomereza
Zotsalira Zamakono Magwiridwe	Nthawi yoyenda pa 1×IΔn, 2×IΔn, 5×IΔn	≤300ms, ≤150ms, ≤40ms (nthawi yomweyo); S-mtundu: ≤500ms, ≤200ms, ≤150ms
	Osayenda pa 0.5×IΔn	Palibe ulendo wa 2 × ovotera nthawi yochedwa
	Kupirira kwamphamvu kwapano (8/20μs, 3kA)	Palibe ulendo wovuta, Mtundu A: 250A kukakamiza, Mtundu F: 1000A, Mtundu B: 3000A
Chitetezo Chowonjezera	Kutentha kumakwera pa ovotera In	Pokwerera ≤80K, nkhani ≤40K
	Kuthamanga kwafupipafupi (Icu/Ics)	3 ntchito, kusokoneza bwino, dielectric kuchira
	Kutsimikizira kwaulendo (L-S-I)	± 10% kulondola kwapano, ± 20% nthawi yolondola
Dielectric Properties	Kupirira kwanthawi yayitali (2.5kV-3.5kV/1min)	Palibe kuwonongeka, palibe flashover
Dielectric Properties	Kupirira kwamphamvu (8kV 1.2/50μs)	Palibe kutulutsa kosokoneza
Makina & Zachilengedwe	Kupirira kwamakina (10,000-20,000 cycles)	<5% parameter drift, palibe kulephera
Makina & Zachilengedwe	EMC chitetezo (IEC 61000-4 mndandanda)	Palibe vuto lopunthwa kuchokera ku kusokoneza / kuchitidwa

Factory Quality Control & Inspection Standards

Incoming Material QC (IQC)

Zakuthupi	Zinthu Zoyendera	Sampling Plan	Zida
Mitundu ya Toroidal Cores	Maginito permeability, machulukitsidwe flux, pakati zotayika	Pa batch, kuyesa kwa BH curve	BH analyzer, impedance analyzer
Sensing waya	Diameter, makulidwe a insulation, voltage yowononga	AQL 0.65	Micrometer, dielectric tester
BMC pulasitiki gulu	Zomwe zili mugalasi, kukhuthala, mawonekedwe ochiritsa, index yotsata	Pa gulu, kuyesa kwa COA +	Rheometer, DSC analyzer, zida zoyeserera
Silver plating solution	Kukhazikika kwachitsulo, pH, zonyansa	Kuwunika tsiku ndi tsiku	Atomic mayamwidwe spectrometer
Zida zamagetsi	Kuyesa ntchito, kutsimikizira kwa parameter, mtundu wa firmware	100% AOI, 5% yogwira ntchito	LCR mita, oscilloscope, malire scan

In-Process Quality Control (IPQC)

Sitimayi	Control Parameters	pafupipafupi	Njira
Mapiritsi a toroidal transformer	Amatembenuza chiŵerengero, inductance, kukana kwa insulation	Chigawo chilichonse	LCR mita, insulation tester
Msonkhano wa CBCT	Kuyesa koyenera ndi katundu wovoteledwa, chitetezo chokwanira ku ma harmonics	Mayunitsi 100 aliwonse	Kuyesa koyambirira kwa jakisoni, jenereta ya harmonic
Kusintha kotsalira kwapano	Malo olowera ku IΔn, nthawi yoyankha, osayenda pa 0.5 × ine	Chigawo chilichonse	Makina oyesera a RCD (0.5-1000mA okonzeka)
Kulumikizana kwakukulu	Kulumikizana kwapakati, kupanikizika, kulumikizana, kukana	Mayunitsi 100 aliwonse	Mphamvu yamagetsi, micro-ohmmeter
Kuphatikiza komaliza	Kuphatikiza overcurrent + kutsimikizira kwaulendo wapadziko lapansi	Chigawo chilichonse	Benchi yoyeserera yophatikizika (jakisoni woyambira + kutayikira)

Final Quality Control (FQC) & QC Yotuluka (OQC)

Chinthu Choyesera	Standard	Kukula Kwachitsanzo
Nthawi yotsalira yaulendo	1×IΔn, 2×IΔn, 5×IΔn pa IEC 61008/61009	100%
Mayeso osakhala paulendo pa 0.5×IΔn	2 × adavotera nthawi yochedwa	100%
Mtsinje waulendo wopitilira	1.05 × Mu, 1.25 × Mu, 5 × Mu, 10 × Mu	100%
Dielectric kupirira voteji	2.5kV AC/1 min	100%
Insulation resistance	>100MΩ @ 500V DC	100%
Kulimbana ndi kukana	<50μΩ pa mtengo	100%
Kutsimikizira chizindikiro cha torque	Kumangitsa kokwererako malinga ndi momwe amafotokozera	100%
Kuyang'ana kowoneka ndi mawonekedwe	Zero zolakwika pamiyeso yovuta kwambiri	100%
Kuwonetsa kukhazikika	Kupukuta zosungunulira, kuyesa abrasion	AQL 1.0
Kupaka umphumphu	Kutsitsa kuyesa, kugwedezeka (ISTA 3A)	Pa zambiri

Zopanga Zopanga & Mphamvu Zopanga

Zida Zapamwamba Zopangira

Zida Gulu	Mafotokozedwe a Makina	Ntchito	Mphamvu
Makina a Toroidal Winding	Makina opindika a toroidal okhala ndi zovuta zowongolera	CBCT pulayimale/sekondale mapiringidzo, mwatsatanetsatane wosanjikiza	5,000 thiransifoma/tsiku
Core Annealing Furnace	Kupukuta kwa mpweya ndi nayitrogeni	Nanocrystalline pachimake kutentha chithandizo, kuchepetsa nkhawa	2,000 cores / batch
Jekeseni Kumangira	300-tani BMC thermosetting makina	Nyumba za CBR, arc chute, ma terminal block	3,000 milandu / tsiku
CNC Machining	5-axis ofukula Machining Center	Makina olumikizana olondola, ma geometri ovuta	8,000 ma seti / mwezi
Chithandizo cha Pamwamba	Makina opangira siliva	Contact plating 8-12μm, makulidwe ofanana ± 1μm	4,000 kg / tsiku
Msonkhano	Maselo a ntchito	Msonkhano wamakina, kuphatikiza kwa CBCT, kusanja	1,500 mayunitsi / tsiku mzere
Zida Zoyesera	Integrated CBR test bench	Kuphatikiza overcurrent + kutsimikizira kwatsopano kotsalira	300 mayunitsi / ora
	Chipinda choyesera cha EMC (3m/10m, Teseq)	Kuyesedwa kwa chitetezo chokwanira / umuna wamayunitsi amagetsi	50 mayunitsi / tsiku

Mphamvu Zopanga & Nthawi Zotsogola

Gulu lazinthu	Mwezi Wathanzi	Nthawi Yotsogolera Yokhazikika	Urgent Order Kutha
CBR 4P (16A-125A)	10,000 mayunitsi	4-5 masabata	3 masiku (zigawo za stock)
CBR Industrial (160A-400A)	8,000 mayunitsi	4-5 masabata	5 masiku
CBR Heavy Industrial (630A-800A)	3,000 mayunitsi	4-5 masabata	7 masiku
Zosintha mwamakonda (IΔn yapadera, ma curve)	Maziko a polojekiti	5-6 masabata	2 masabata

Kapangidwe ka Gulu la Engineering & Technical Team

Dipatimenti	Ogwira ntchito	Katswiri	Maudindo
R&D Engineering	5 mainjiniya	Ukadaulo wamakono wotsalira, kapangidwe ka sensor ya maginito, makina ophatikizidwa, zamagetsi zamagetsi	Kukula kwatsopano kwa CBR, luso la mtundu wa B/F/B+, mbiri ya patent (40+ patent)
Process Engineering	18 mainjiniya	Kupanga toroidal thiransifoma, kuumba kwa BMC, kusonkhana mwatsatanetsatane, kupanga zowonda	Kukhathamiritsa kwa kupanga, zolemba za SOP, kuwongolera zokolola (> 99.5%)
Kuyesa & Kutsimikizira	15 mainjiniya	Kuyesa kwamakono, kuyerekezera kotsalira, EMC, kuyesa kwachilengedwe	Kuyesa kwamtundu (IEC 60947-2 Annex B, IEC 61008/61009), kusanthula kulephera
Ntchito Engineering	10 mainjiniya	Kugwirizana kosankha, njira zotetezera kutayikira kwapadziko lapansi, EV / ntchito zongowonjezera	Thandizo laukadaulo lamakasitomala, maphunziro a tsankho, kutumiza malo
Chitsimikizo chadongosolo	30 akatswiri	ISO 9001, ISO 14001, kuwongolera njira zowerengera, labotale ya metrology	Kuwunika kwa ogulitsa, kufufuza njira, kukonza zochita, kasamalidwe ka ma calibration

Zitsimikizo & Zolemba Zogwirizana

Chitsimikizo	Thupi Lopereka	Mbali	Kutsimikizika
ISO 9001:2015	ZHONGDA HUAYUAN	Njira yoyendetsera bwino	Kuyang'anira pachaka
Mayeso amtundu wa IEC 60947-2 Annex B	EUROLAB	Kuchita kwa mafakitale a CBR	Pa mndandanda wazinthu
Chizindikiro cha CE	Bungwe Lodziwitsidwa	Kupeza msika wa EU	Zogwirizana ndi mapangidwe
CCC (China)	Mtengo CQC	Chitsimikizo cha China chokakamiza	Zaka 5 zovomerezeka
Pulogalamu ya CB	IECEE	International certification	Pa mndandanda wazinthu

Chifukwa Chake Kupanga Kwathu kwa CBR Kumasiyana

Malo athu opanga akuyimira40 zaka specialization muukadaulo wotsalira wapano komanso wapadziko lapansi, wopereka ma CBR omwe amapitilira miyezo yapadziko lonse lapansi kudzera:

Katswiri wa toroidal transformer: Kupanga kwamkati kwa nanocrystalline core, automation yokhazikika, komanso kuyezetsa kwathunthu kwa CBCT kuwonetsetsa <± 5% kulondola

Kuphatikiza koyima: Kuchokera pakukonza zinthu zoyambira mpaka kuphatikizira komaliza, kuwongolera kwathunthu pazinthu zofunikira (zosintha zama toroidal, mayunitsi apaulendo apakompyuta, milandu yowumbidwa)

Zida zoyesera zapamwamba: $3M+ yoyikidwa m'makina oyeserera a CBR ophatikizika omwe amatha kutsimikizira nthawi imodzi mopitilira muyeso komanso zotsalira zapano, kuyesa kwamtundu wa B DC, ndi kutsata kwa EMC

Njira yapadziko lonse lapansi ya certification: Kutsata kwamitundu ingapo komwe kumathandizira kulowa msika wopanda malire m'maiko 100+ popanda kuyesa kopitilira muyeso

Pazambiri zaukadaulo, maphunziro ogwirizanitsa osankhidwa, chiwongolero cha kagwiritsidwe ntchito ka mtundu wa B, kapena kachitidwe ka kafukufuku wamafakitale, gulu lathu la uinjiniya limalumikizana mwachindunji kuti zitsimikizire kuti zomangamanga zanu zachitetezo chapadziko lapansi zikukwaniritsa zofunikira zachitetezo cha ogwira ntchito komanso zolinga zopitiliza ntchito.

CDADA ndi Earth Leakage Circuit Breaker opanga ndi ogulitsa ku China. Fakitale yathu imagwira ntchito m'mafakitale osiyanasiyana monga makina amagetsi, makina opangira makina, komanso kupanga mafakitale, kupereka mayankho osinthika a OEM/ODM.

Malangizo a Nkhani