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EN 50155 ke Eng? Tataiso e Feletseng ea Litekanyetso tsa Elektronike tsa Railway

2024-08-13 16:29:49

The EN 50155 e tloaelehileng ke letšoao la bohlokoa indastering ea literene, ka ho khetheha e laolang thepa ea elektronike e kentsoeng ka rolling stock- literene le literene tse sebetsang ho pholletsa le Europe le lefats'e ka bophara. Tekanyetso ena e hlalosa ho litlhoko tsa ts'ebetso, moralo, tlhahlobo le tikoloho bakeng sa lisebelisoa tse kang lik'homphieutha tsa terene, litsamaiso tsa taolo, li-switches tsa marang-rang, le lisebelisoa tsa ho beha leihlo tse behiloeng ka har'a literene.

Bohareng ba eona, EN 50155 e tiisa seo pc e kentsoeng e se nang fane sebelisoang litereneng e ka sebetsa ka mokhoa o ts'epahalang tlas'a maemo a feteletseng le a matla, ho kenyelletsa le ho feto-fetoha ha mocheso ho pharaletseng, ho thothomela ho sa feleng, mongobo, le mefuta e fapaneng ea phepelo ea motlakase. Qalong ntshetswa pele ke Komiti ea Europe ea Tekanyetso ea Electrotechnical (CENELEC), e se e amohetsoe ka bophara ho pholletsa le linaha le bahlahisi ba tsepamisitseng maikutlo ho seporo sa terene, pontsho ya seporo, le litsamaiso tsa polokeho ea terene.

EN50155 Railway Certified Rugged Fanless Computer

Lintlha tsa bohlokoa tse koahetsoeng tlas'a EN 50155 li kenyelletsa:

Lihlopha tsa Mocheso oa Ts'ebetso (mohlala, TX bakeng sa -40°C ho isa +85°C)
Tšisinyeho le Ho thothomela
EMC (Tsamaiso ea Motlakase) Ho lumellana
Mamello ea Phepelo ea Matla
Litebello tsa MTBF (Nako e Bolelang lipakeng tsa ho hloleha).

Litlhoko tsena li bohlokoa bakeng sa ho hlokomeloa ts'ebetso e bolokehileng, e tšepahalang, le ea nako e telele ea bophelo ea lisebelisoa tsa elektroniki tse sebelisoang li-rolling stock applications.

Bohlokoa ba EN 50155 bo ntse bo hola hammoho le digitization ea litsamaiso tsa terene. Joalo ka sepalangoang se bohlale, ho beha leihlo, le mekhoa ea tlhahisoleseding ea bapalami fetoha, tlhokahalo ea EN 50155 e netefalitsoeng li-PC tse thata le k'homphieutha e se nang fan ea indasterie tsoetse pele.

Standard	Morero	E sebetsa Ho
EN 50155	Litekanyetso tsa ts'ebetso le liteko	Thepa ea elektronike ea terene
EN 45545	Tšireletso ea mollo likoloing tsa terene	Lisebelisoa le lisebelisoa ka har'a rolling stock
IEC 60571	Thepa ea elektronike likoloing tsa terene	Ts'ebetso e akaretsang le polokeho

Ka bokhutšoane, EN 50155 ha se feela tataiso ea tekheniki — ke tsela ea ho etsa bonnete ba hore botshepehi le polokeho ea lipalangoang tsa sejoale-joale tsa terene.

II. Hobaneng ha EN 50155 e le Litaba ho Likopo tsa Terene

The EN 50155 e tloaelehileng e bapala karolo ea bohlokoa ho bopeng polokeho, durability, le tshebetso ea litsamaiso tsa elektroniki tse sebelisoang likopo tsa terene. Ho tloha lik'homphieutha tsa terene tse kentsoeng ho mekhoa ea puisano ea marang-rang, tekanyetso e fana ka moralo o hlophisitsoeng ho netefatsa hore lisebelisoa li ka mamella maemo a thata le a fapaneng a ts'ebetso a teng mekoloko ea setoko. Ithute ka SINSMART komporo e kenelletseng e senang fan 'moho lekhomphuteng ya koloi.

Ea kajeno mekhoa ea lipalangoang tsa terene ts'epa haholo ho data ea nako ea nnete, li-automation, le litsamaiso tsa taolo tse tlamehang ho sebetsa 24/7 tlas'a mocheso o feto-fetohang, ho se tsitse ha matla, ho ts'oha ha mochini le tšitiso ea motlakase. EN 50155 - lisebelisoa tse lumellanang e etselitsoe ho kopana le maemo ana a thata, ho fokotsa ho hloleha le ho fokotsa litšenyehelo tsa tlhokomelo ka nako e telele.

Mona ke moo EN 50155 e etsang phapang:

✅ Ho tšepahala: Lisebelisoa li lekoa bakeng sa tshoso, thothomelo, mocheso, le ho feto-fetoha ha matla, ho netefatsa ts'ebetso e tsitsitseng libakeng tsa literene tse tsamaeang.
✅ Tšireletseho Compliance: E lumellana le litekanyetso tsa polokeho ea terene, ho tšehetsa mangolo a mang a kang EN 45545 bakeng sa tšireletso ea mollo le IEC 61373 bakeng sa ho tšoarella ha mochini.
✅ Tšebelisano-'moho: Likarolo tse entsoeng tlasa maemo ana li hokahana ka mokhoa o phethahetseng Li-platform tsa li-stock tsa Europe le tsa lefats'e.
✅ Tiisetso ea Phello: E netefatsa hore thepa ea IT ea terene e ea kopana bophelo bo bolelele ba tshebeletso litebello, hangata tse fetang lilemo tse 10-15.

Bakeng sa Li-OEM, li-integrator tsa tsamaiso, le basebetsi ba terene, ho khomarela EN 50155 ha se taba ea boikhethelo—ke tlhokahalo ea motheo bakeng sa ho tsamaisoa ha literene tsa sejoale-joale. Ho khetha li-PC tsa indasteri tse netefalitsoeng ka terene, balaoli ba mahlahahlaha, le Sistimi e kenelletseng ea EN 50155-e lumellanang e netefatsa ts'ebetso, polokeho, le scalability ea bopaki ba nako e tlang ho pholletsa le meaho ea terene ea dijithale.

III. Litlhoko tsa Bohlokoa tsa Tikoloho le Motlakase

The EN 50155 e tloaelehileng e hlalosa ka thata litlhoko tsa tikoloho le tsa motlakase bakeng sa lisebelisoa tsa elektroniki tse sebelisoang ho li-rolling stock applications. Litlhoko tsena li netefatsa hore botshepehi, polokeho, le tshebetso ea litsamaiso tse kentsoeng tikolohong e thata ea literene—ebang ke literene tse lebelo, metro, kapa literene tsa libaka.

1. Maemo a Tikoloho

Ts'ebetso ea literene e pepesa lisebelisoa tse holim'a sekepe ho khatello e feteletseng ea 'mele le tikoloho. EN 50155 e hlalosa lihlopha tse khethehileng tsa mamello bakeng sa ntlha e 'ngoe le e 'ngoe ea bohlokoa:

Mekhahlelo ea Mocheso:
- Sehlopha sa T1: -25°C ho ea ho +55°C
- Sehlopha sa T2: -40°C ho ea +70°C
- Sehlopha sa TX: -40°C ho ea +85°C (bakeng sa maemo a thata a ka ntle)
Ho hanyetsa Mongobo:
- E tlameha ho mamella ho fihlela ho 100% mongobo o lekanyelitsoeng, e se nang condensation
Ho thothomela le ho sisinyeha:
- Lisebelisoa li tlameha ho ikamahanya le maemo IEC 61373, ho sebetsana le motsamao oa literene tsa maqhubu a phahameng le ho latela mekhoa e fosahetseng
Tšireletso ea IP:
- Hangata e hloka IP65 kapa ho feta bakeng sa tshireletso kgahlanong le lerole le metsi a kenang

2. Litšobotsi tsa Motlakase

The tikoloho ea motlakase litereneng e tumme hampe ka ho hloka botsitso. EN 50155 e laela ho mamella ho:

Liphetoho tsa Voltage:
- Mamello ho +/-40% nominal input voltage
- Li-surges tsa nakoana le li-brownouts
Litšitiso tsa Phepelo ea Matla:
- E tlameha ho mamella 10 ms kapa ho feta tšitiso ntle le ho hloleha ho sebetsa
Tšebelisano ea Motlakase (EMC):
- Lisebelisoa li tlameha ho kopana EN 50121-3-2 ho thibela ho kena-kenana le motlakase ho litsamaiso tsa taolo ea terene

Mofuta oa Tlhokahalo	E Khethiloeng	Tšusumetso ho Sesebediswa
Thempereichara Class TX	EN 50155 Karolo ea 12.2.4	Mamello e pharaletseng ea nako bakeng sa literene tsa kantle
Mamello ea Phepelo ea Matla	EN 50155 Karolo ea 5.3	E sebetsana le voltage ea onboard e sa tsitsang
Tšireletso ea EMC	EN 50121-3-2	E thibela ho kena-kenana le litsamaiso tsa bohlokoa

Ho kopana le tsena Litekanyetso tsa EN 50155 tsa tikoloho le tsa motlakase e bohlokoa bakeng sa ho tsamaisa li-PC tsa indasteri tse thata, balaoli ba kentsoeng, le li-switches tsa maemo a terene litereneng tse hlokang ts'ebetso e sa sitisoeng le e tšoarellang.

IV. Litlhokahalo tsa mantlha tsa ts'ebetso ea EN 50155

The EN 50155 e tloaelehileng ha e bue feela ka maemo a tikoloho le a mochini empa hape e beha litlhoko tsa ts'ebetso ea ts'ebetso tse netefatsang hore thepa ea elektronike literene tse ka har'a sekepe li lula li tsitsitse, li arabela, 'me li le matla nakong ea ts'ebetso ea letsatsi le letsatsi. Litlhaloso tsena li theha mokokotlo oa khomphutha e tiisitsoeng ka terene, haholo-holo bakeng sa litsamaiso tse kentsoeng, li-module tsa taolo ea terene, le lisebelisoa tse thata tsa puisano.

1. Phepelo ea Matla & Mamello ea Voltage

Libaka tsa terene li atisa ho hlokofatsoa ke ho se tsitse ha matla ka lebaka la ho matha ha cable nako e telele le braking e nchafatsang. Ho fokotsa litšitiso, EN 50155 e laela:

Mamello ea motlakase oa ho kenya ± 40% kapa ho feta
Mamello ea tšitiso ea motlakase (hangata 10 ms bonyane)
Tšireletso khahlanong le tse fetelletseng le tse phatlollang

Lisebelisoa li tlameha ho kopanngoa Li-converter tsa DC-DC kapa li-buffers tsa kahare ho fihlela maemo ana ntle le ho qala bocha kapa tahlehelo ea data.

2. Tšebelisano ea Motlakase (EMC)

Litefiso tsa EN 50155 EN 50121-3-2, e hlokang hore lisebelisoa:

Ha e ntše lerata le kotsi la motlakase
Ha e na tšitiso ea lisebelisoa tse haufi
E ka sebetsa ka mokhoa o sireletsehileng haufi le litsamaiso tsa lipontšo le lithapo tsa motlakase

Sena se bohlokoa bakeng sa ho boloka botšepehi ba taolo ea terene, braking, le mekhoa ea puisano ea baeti.

3. MTBF le Boteng ba Tsamaiso

Nako e Bohareng pakeng tsa ho Failures (MTBF) ke metric ea bohlokoa bakeng sa ho tšepahala. EN 50155 e khothaletsa:

Litekanyetso tsa MTBF ho feta lihora tse 100,000
Likarolo tsa nako e telele tsa bophelo ka phumaneho e atolositsoeng
Likhetho tse fetohang tse chesang kapa tse sa hlokeng letho bakeng sa litsamaiso tsa bohlokoa tsa mission

Tlhokahalo	Tlhaloso	Morero
Range ea Voltage	± 40% mamello ho tsoa ho kenyelletso ea lebitso	Sebetsa nakong ea ho phahama ha matla a terene
Ho latela melao ea EMC	EN 50121-3-2	Qoba ho kena-kenana le tsamaiso
Tebello ea MTBF	>100,000 lihora tse tloaelehileng	Etsa bonnete ba hore nako ea ts'ebetso ea nako e telele

Ho kopana le tsena ditlhoko tsa tshebetso e bohlokoa bakeng sa ho tsamaisa Li-PC tsa EN 50155 tse lumellanang le li-rugged, litsi tsa puisano tsa terene, le balaoli ba ka har'a sekepe e tlamehang ho sebetsa ka mokhoa o tsitsitseng tsamaiso ea nako ea sebele ea terene.

VII. Sebelisa Maemo a EN 50155-Compliant Equipment

Lisebelisoa tse lumellanang le EN 50155 li bohareng ba sejoale-joale tsamaiso ea literene, moo ho tšoarella, botsitso le tšireletseho li ke keng tsa buisanoa. Litharollo tsena tse ruggedized li entsoe hore li sebetse ka mokhoa o ts'epahalang maemong a sa lebelloang a rolling stock-ho tloha ho literene tse lebelo le metro ho ea ho literempe le likoloi tse bobebe tsa terene.

1. Taolo ea Terene & Monitoring Systems (TCMS)

Tsena ke boko ba ts'ebetso ea likoloi. Litaolo tse kentsoeng tsa EN 50155-tse netefalitsoeng ba ikarabella bakeng sa:

Ho laola litsamaiso tsa braking, taolo ya monyako, le tlhahlobo ea enjene
Ho hokahana le li-sensor le li-module tsa ho fumana data ka nako ea nnete
Ho netefatsa ts'ebetso e tsitsitseng leha ho na le vibrate kapa ho feto-fetoha ha motlakase

2. Litsamaiso tsa Boitsebiso ba Bapalami (PIS)

Ho bonts'a lintlha tse nepahetseng tsa maeto ho bohlokoa molemong oa khotsofalo ea bapalami. Lipontšo tse netefalitsoeng tsa EN 50155 le li-PC tsa phanele tsa indasteri matla:

Hona joale diapdeite tsa ho fihla/ho tloha
Audio le pono liphatlalatso
Litaba li ntse li tsoela pele letshwao la dijithale skrineng

3. CCTV le Tebelo

Sistimi ea ho rekota livideo ea boemo ba terene e tlameha ho sebetsa ka ho sisinyeha le tlas'a maemo a feteletseng. Litsamaiso tsena:

Rekota ka HD bakeng sa ts'ireletso le tlhahlobo ea liketsahalo
Boloka data ho li-SSD tse thata ka paballo e telele
Sebetsa le latency e tlase ka gigabit Ethernet

4. Litsela tsa Khokahano le Liphetoho tsa Marang-rang

Ho hokela li-subsystems le lisebelisoa, TS EN 50155 li-switch le li-routers tse lumellanang thusa:

Puisano ea Ethernet / IP pakeng tsa makoloi
Karohano bakeng sa data e hlokolosi le e seng ea bohlokoa
Khokahano ea nako ea 'nete ho pholletsa le stock e ntseng e tsoela pele

VIII. Mehopolo ea Moralo bakeng sa Tumellano

Moralo EN 50155 - lisebelisoa tse lumellanang e hloka tlhokomelo e hlokolosi ho bobeli meralo ya hardware le botsitso ba mochini. Ha se feela ka likarolo tse ruggedizing - e mabapi le litsamaiso tsa kaho tse lulang li sebetsa tlasa litšitiso tse khethehileng tsa terene, joalo ka mefuta e mengata ea maqhubu a motlakase, ho thothomela kamehla, le tšitiso ea motlakase.

1. Tsamaiso ea Mocheso le Moqapi o Bophara oa Mocheso

EN 50155 e hloka ts'ebetso ho lihlopha tsa mocheso ho tloha ho Sehlopha sa TX (-40°C ho +85°C). Baenjiniere ba tlameha ho kenya ts'ebetsong:

Sistimi ea ho futhumatsa e senang fan ho sebedisa disenke tsa mocheso tse sa sebetseng
Likarolo tsa boemo ba indasteri ka litekanyetso tse netefalitsoeng
Moralo o bohlale ho qoba libaka tse hotspots le khatello ea maikutlo

Mehato ena e thibela ho chesa haholo nakong ea ts'ebetso e tsoelang pele ka har'a libaka tse koetsoeng kapa likariki tse nang le mongobo o phahameng.

2. Kaho e Matla ea Mechini

Literene li hlahisa ho tshoha le ho thothomela kamehla, haholo-holo libakeng tsa litsela tse telele kapa tsa litoropong. Ho fokotsa mathata:

Sebelisa ho roala ka mokhoa o hlophisitsoeng ho sireletsa libaka tsa PCB
Sireletsehile likarolo tse ka hare e nang le lisebelisoa tse thothomelang
Khetha bakeng sa liqhobosheane tse makukuno e nang le lisebelisoa tse thibelang ho lokoloha

Ho feta moo, IEC 61373 Ho lumellana ha khatello ea mochini hangata ho kopanngoa le EN 50155.

3. Lihokelo tsa Liindasteri le Li-interface

Ho sebelisa Lihokelo tsa M12, li-terminals-lock lock, le likou tse tiisitsoeng e netefatsa ho tšepahala:

Ethernet le USB likou li lokela ho hana ho lokoloha nakong ea ho sisinyeha
Li-interface tsa motlakase li tlameha ho mamella ho phahama le ho tlohela
Taba ea boikhethelo PoE (Matla holim'a Ethernet) bakeng sa ho nolofatsa likhoele ka har'a li-cabins tse thata tsa terene

Ka ho sebetsana le tsona lintlha tsa moralo, bahlahisi ba ka hlahisa litsamaiso tse kenyellelitsoeng tsa terene tse netefalitsoeng le li-PC tsa indasteri tse thata tse fanang ka boleng ba nako e telele, polokeho, le ts'ebetso ho latela Litekanyetso tsa EN 50155.

IX. Mathata a Tloaelehileng le Malebela a Phethahatso

Ho lumellana le EN 50155 e tloaelehileng ha se taba ea ho fana ka setifikeiti feela—e hloka boenjineri ba ka boomo, liteko tse matla, le ho tsamaisana le sistimi ka bophara. Bakeng sa li-integrator tsa tsamaiso ea terene, Li-OEM, le baetsi ba lisebelisoa, ho tsamaisa mathata ana ho bohlokoa ho aha litharollo tse matla, tse lokiselitsoeng seporo tse kopanang le litekanyetso tsa indasteri.

Mathata a Tloaelehileng

Tsamaiso ea ho se tsitse ha Matla
Maemo a rolling stock a tumme hampe ka ho phahama ha voltage, li-dips, le li-cable runs tse telele. Ho etsa moralo a kaho e tsitsitseng ya matla e kopanang le EN 50155's ± 40% mamello le menyako e sitisang matla e ka ba thata ntle le boemo bo tsoetseng pele ba matla kapa Li-buffers tsa DC-UPS.
Khatello ea Mocheso le Botsofali ba Karolo
Lipotoloho tse feteletseng tsa mocheso (-40 ° C ho + 85 ° C) li ka theola lisebelisoa tsa elektronike tsa boemo ba khoebo ka nako. Ho hloleha ho sebedisa likarolo tse lekantsoeng ke indasteri e ka lebisa ho hloleheng ha tšimo pele le ho se ikobele.
Litšitiso tsa Boholo le ho Homa
Mehaho e mehatla e thata e hloka hore e kopane, ha e na fene, 'me e hlomelloa habonolo litsamaiso tse kentsoeng. Kopano ho hanyetsoa ha ts'okelo ea mochini (ka IEC 61373) ha o ntse o ntlafatsa sebopeho sa kahare ke papali ea bohlokoa ea moralo.
EMC le Likotsi tsa Tšitiso
Terene ea elektronike e tlameha ho sebetsa ntle le ho baka kapa ho hlokofatsoa ke tšitiso ea motlakase. Ho kopanya EMC e sireletsa, sebopeho se nepahetseng sa PCB, le ho theoa ha cable ho bohlokoa.

X. Mekhoa ea Bokamoso le Liphetoho ho Maemo a Terene

Ha marangrang a literene a lefatše a ntse a tsoela pele phetoho ea dijithale, karolo ea Sistimi e lumellanang le EN 50155 e fetoha ka potlako. Theknoloji e ntseng e tsoela pele - joalo ka khomphutha ea moeli, Litlhahlobo tse tsamaisoang ke AI, le Khokahano ea IoT- ba hlalosa kamoo lisebelisoa tsa elektronike tsa terene li entsoe, li netefalitsoe, 'me lia sebelisoa. Ho lula ka pele ho litloaelo tsena ho bohlokoa bakeng sa bahlahisi, bahokahanyi ba sistimi, le basebelisi ba batlang ho aha maemo a terene a bohlale le a hokahaneng.

1. Ho kopanya le Smart Rail Infrastructure

Moloko o latelang oa Lisebelisoa tse lumellanang le EN 50155 e tla bapala karolo ea mantlha ho nolofatseng mesebetsi e bohlale ea terene, ho kenyelletsa:

Tlhokomelo ya esale pele e tsamaisoa ke li-analytics tsa onboard
Ho latedisa terene ka nako ya nnete e nang le li-sensor tsa AI
Koloi-to-infrastructure (V2I) mehala ea puisano

Phetoho ena e hlokahala lik'homphieutha tse thata tse kentsoeng ka matla a phahameng a ho sebetsa, li-CPU tse ngata-ngata, le Li-accelerator tsa AI, kaofela ha u ntse u boloka tumellano e felletseng le Litekanyetso tsa EN 50155 tikoloho le EMC.

2. Evolution of Standards and Interoperability

EN 50155 e ntse e ntlafatsoa ho bonts'a ho rarahana ho ntseng ho eketseha ha litsamaiso tsa sejoale-joale tsa terene. Litlhahlobo tse tlang le litlatsetso li ka hatisa:

Boikemisetso ba Cybersecurity
E ntlafalitsoe tšepahala phetiso ya data
Ho lumellana le litekanyetso tse kang EN 45545, IEC 62443, le IEC 60571

Ha tikoloho ea barekisi ba bangata e ntse e hola, tshebedisano e fetoha ntho ea bohlokoa ka ho fetisisa. Lisebelisoa ha lia lokela ho ba tse thata le tse netefalitsoeng feela, empa hape bulehileng kaho-itokisitse bakeng sa ho tsamaisoa ha literene ka sekhahla.

Tloaelo	Tšusumetso ho EN 50155 Systems
AI & Edge Computing	E eketsa litlhoko tsa ho sebetsa le tsa mocheso
Cybersecurity & Data Botšepehi	Likarolo tse ncha tsa ho latela melao bakeng sa phallo e sireletsehileng ea data
V2X le IoT ka terene	E hloka li-modular, li-platform tse hokahaneng tse hokahaneng

Ka ho lebella tsena esale pele liphetoho tsa theknoloji, baetsi ba ka bokamoso-bopaki ba bona literene computing platforms le ho dula re na le tlhodisano lekaleng la dipalangwang tse ntseng di fetoha tsa sejwalejwale ka potlako. The EN 50155 e tloaelehileng ha e sa le feela ho tšoarella — ke moralo oa ho nolofalletsa bohlale ba dijithale tsamaisong ea literene.

XI. Qetello: Hobaneng EN 50155 e le Bohlokoa Bakeng sa Litsamaiso tsa Sejoale-joale tsa Terene

The EN 50155 e tloaelehileng e se e le tlhokahalo ea motheo moralong le phepelong ea litsamaiso tsa elektroniki bakeng sa ho tsamaisa thepa. Ha literene li ntse li hlaka, li potlakile, 'me li hokahane ho feta, tlhokahalo ea e ka tšeptjoang, matsutla-tsutla, le lisebelisoa tsa khomphutha tse lumellanang ha ho mohla e kileng ea phahama. EN 50155 e netefatsa hore lisebelisoa tsohle tsa elektroniki tse ka har'a sekepe - hore na ke k'homphieutha ea terene, pontsho ya baeti, kapa netweke switjha-e ka sebetsa tlas'a maemo a feteletseng a ts'ebetso e nang le kotsi e fokolang ea ho hlōleha.

Melemo ea Bohlokoa ea Ts'ebetso ea EN 50155:

✅ Boiketlo ba Ts'ebetso: E mamella mefuta e mengata ea mocheso, ho tšoha, ho sisinyeha, mongobo le ho feto-fetoha ha motlakase
✅ Tiisetso ea Polokeho: Ho khomarela litekanyetso tse thata tsa EMC ho sireletsa tsamaiso le lisebelisoa tse potolohileng
✅ Ho Tšepahala Nako E telele: Hangata litsamaiso li hloka MTBF > lihora tse 100,000, ho netefatsa nako e fokolang
✅ Kamohelo ea Taolo: E amohetsoe ke balaoli ba literene le lihlopha tsa ho reka thepa lefatsheng ka bophara

Bakeng sa Li-OEM le li-integrator tsa tsamaiso ea terene, khetha Lisebelisoa tse netefalitsoeng tsa EN 50155 e nolofatsa phepelo, e fokotsa nako ea ho rekisa, 'me e netefatsa ho lumellana le tse ling polokeho ea terene le litekanyetso tsa mollo joalo ka EN 45545 le IEC 61373.

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