Kana mutengi weEPC akanditumira substation grounding RFQ, mitsara miviri yekutanga yandinoverenga ndeye fault current uye inodzivirira ivhu - kwete dhayamita yetsvimbo. Kurongeka ikoko kunokosha. IEEE Std 80 haikuudzi kuti utenge 5/8 in kana 3/4 intsvimbo yepasi yechiteshi chepasi; inokuudza kuti urarame kana paine chikanganiso. Upamhi nehurefu hwetsvimbo zvinosiyana kubva pakuverenga kutatu: kutarisa kwekupisa pakurwisa simba remagetsi, kutarisa kwekudzivirira ivhu, uye kutarisa kwekubata-ne-nhanho pakurwisa pamusoro pevhu. Muzvizhinji zvezviratidzo zvandinoongorora, zvinowira patsvimbo dzesimbi dzakasungirirwa nemhangura dzine dhayamita ye14.2–19 mm uye kureba kwe2.4–3.0 m— asi chiyero, kwete katalogu, ndicho chinofanira kusarudza. Chinotevera ibasa randinoita pane rimwe nerimwe rawo.
TL;DR — Mhinduro yeSaizi muMitsara Mina
- Pakukanganisa kwe40 kA, 1 s, equation yeIEEE 80 inoda 141.9 mm² yemhangura - saka kunyange tsvimbo yedu diki ye14.2 mm, pa158.4 mm², inopfuura nepakati pekupisa.
- Kupeta kaviri hurefu hwetsvimbo inopfurwa kubva pa1.5 m kusvika pa3.0 m kunoderedza simba rayo rekudzivirira ivhu ne44% muvhu rakafanana, ukuwo kupeta kaviri dhayamita kubva pa14.2 mm kusvika pa25 mm kunotenga 9% chete - kureba ndiko kunobatsira kufambisa simba rekudzivirira.
- Chikamu che fault current chinongopinda mugrid yako chete: mune zvakanyorwa muEasyPower (Bentley Systems), 691 A chete ye22 kA fault ndiyo yakakonzera kukwira kweground potential yegrid - split factor inoshandura kuverenga kwega kwega kwedownstream.
- Rutivi rwepamusoro rwematombo akapwanyika rwe150–200 mm chikamu chekuchengetedza, kwete kugadzira maruva: kuabvisa kunoputsa simba rekubata rinoshivirirwa mune imwe muenzaniso weIEEE 80 wakashanda kubva pa1,314 V kusvika pa222 V.
Zvinodiwa NeIEEE 80 Netsvimbo Yepasi Kuti Iite
IEEE Std 80 — Gwaro reKuchengetedzwa muAC Substation Grounding, rakazosimbiswazve munguva pfupi yapfuura muchinyorwa chayo che2013 — riripo kupindura mubvunzo mumwe chete: panguva yekukanganisa kwepasi, magetsi ekubata nematanho anogona kusangana nemunhu anoramba ari pasi pemiganhu inoshiviririka here? Mutemo wese unodzikira pakuenzanisa ma voltage akaverengerwa uye matanho ematanho nematanho anoshiviririka anoenderana nenguva yekukanganisa, huremu hwemuviri, uye pamusoro penzvimbo, senhanho nhanho IEEE 80 kufamba kubva kuWind farm BoPZvinodaro. Rodhi yako yepasi ye substation inogara mukati mecheni iyoyo panzvimbo mbiri: inofanira kutakura chikamu chayo che fault current pakupisa, uye inofanira kubatsira kuchengetedza grid resistance yakaderera zvakakwana kuitira kuti ground potential rise (GPR) irambe ichikwanisika.
Nhamba imwe chete inochinja zvese zviri pasi pemvura, uye vatengi vanowanzoipotsa:Haasi magetsi ese anoyerera mugridi yako.Waya dzesimbi, tambo dzesimbi, uye neutral zvinotakura chikamu kudzokera kuchinobva.Nekuti chikamu chakapatsanurwa che fault current chete chinoyerera nepakati pegrid remunharaunda, kuyera tsvimbo yega yega neconductor kusvika pa fault current yakazara inofukidza mhangura nekaviri kusvika kashanu.Bhuku rekuongorora grounding kubvaBentley Systems (Nhanganyaya yekuongorora kweGrounding, 2024)inoshanda nyaya isingakanganwiki: ye22 kA phase-A fault, 691 A chete ndiyo yakatora nzira yakagadzira GPR yesystem yekudzika - yasara yakadzoserwa kuburikidza netambo. Nhungamiro kubva kuGwaro rekugadzira pasi reKeentel Engineering rekushandisa substationinoisa zvinhu zvinopatsanurwa negrid pa20–50% yehuwandu hwemagetsi emagetsi, zvichienderana nekuti nharembozha dzakawanda sei uye nzira dzisina kusimba dzinobuda pachiteshi.
Danho 1 — Tanga Nevhu, Kwete Tsvimbo
Kuverenga kwese kwepasi kwandakaona kusina kunaka kwakatanga nekatalogu panzvimbo peongororo yekudzivirira. Kudzivirira ivhu (ρ) ndiko kwakanyanya kukosha muIEEE 80 yese, kunobva pa10 Ω·m muvhu rakanyorova kusvika pa10,000 Ω·m mudombo rakaoma - kupararira kwakapetwa ka1000, zvichienderana neWind farm BoP walkthrough. Bhuku reBentley Systems rinowedzera zvinhu zviviri zvechokwadi mumunda: nzvimbo dzine kudzivirira kwakafanana kusvika pakadzika chaiko "hadziwanzo kuwanikwa," uye munzvimbo dzine ivhu rinooma nechando, kudzivirira kunokwira zvakanyanya nekuti kufamba kwemaion kunomira. Nhamba yakakopwa kubva patafura yemabhuku haisi yekuyera nzvimbo.
Kana vatengi vakandibvunza kuti ndingawana sei nhamba iyoyo, ndinovaratidza nzira yeIEEE Std 81′s Wenner four-pin: four pins at equal spacing a, current inopinda kuburikidza ne outer pair, voltage read over the inner pair, uye ρ = 2πaR. Bhuku raBentley rinokurudzira kushandisa pin spacing out kusvika padanho repamusoro regrid, nekuti test current inobva yaongorora zvakadzama segrid yako yakafara - ivhu chairo richagara mariri.Nekuti kudzivirira kwevhu kunoiswa nechikamu chevhu chinobatwa netsvimbo chaiyo, tsvimbo ye3.0 m inorovererwa muchikamu chisina simba inogona kukunda tsvimbo ye6.0 m yakavharirwa muchikamu chepamusoro chakaoma.
Semuenzaniso, Wind farm BoP yakashanda inoshandisa nzvimbo chaiyo ye110 kV wind farm substation: grid ye40 m × 65 m, spacing ye4–7 m conductor, 0.5–0.8 m burial, uye tsvimbo dzakaputirwa nemhangura dzinenge 3 m pa perimeter ne kiyi midziyo, muvhu re50–150 Ω·m.
Danho rechipiri — Kuongorora Kupisa: Ko Tsvimbo Ichapona Here Pakukanganisa Kwemagetsi?
Equation yekutanga yehukuru muIEEE 80 haina chekuita neresistance. Inobvunza kana conductor ichigona kunwisa kupisa kwefault pasina kudzvanya kana kusanganisa: A = I × √t₊ / K, uko material constant K inopetwa mu thermal capacity, resistivity, uye high permissional tembiricha yesimbi. Kune annealed constants yestandard's Table 1 i thermal coefficient ye resistivity ye 0.00393 /°C, resistivity ye 1.72 μΩ·cm, thermal capacity ye 3.42 J/cm³/°C, uye highest tembiricha ye 1,083 °C — melting point ye copper, sezvakarongwa muWind farm BoP walkthrough. Edza nhamba nenguva yakajairwa ye clearing ye 1 s uye ambient ye 40 °C, uye cross-section inodiwa inosvika 7.0 kcmil pa kA ye fault current — inenge 3.55 mm² pa kA.
Hezvino zvinorehwa nazvo pandinomhanyasaizi yetsvimbo yepasi ine chikanganisokune mutengi:
| Dhizaini yekukanganisa kwedhizaini padanda | Chikamu chinodiwa | Tsvimbo ye14.2 mm (158.4 mm²) | Tsvimbo ye17.2 mm (232.4 mm²) |
|---|---|---|---|
| 20 kA | 70.9 mm² | Mapasi, 2.2 × margin | Mapasi, 3.3 × margin |
| 25 kA | 88.7 mm² | Mapasi, 1.8 × margin | Mapasi, 2.6 × margin |
| 30 kA | 106.4 mm² | Mapasi, 1.5 × margin | Mapasi, 2.2 × margin |
| 40 kA (inochengetedza, isina kupatsanurwa kwechikwereti) | 141.9 mm² | Mapasi, 1.1 × margin | Mapasi, 1.6 × margin |
Ini ndinoshandisa column ye conservative — full fault current, hapana split credit — nekuti mutengi anoienzanisa nayo anogona kudzivirira spec mune chero ongororo yedhizaini.Nekuti tsvimbo iri mugrid ine tsvimbo dzakawanda inotakura chete chikamu chayo chegrid current, uye grid pachayo inoona chikamu chakapatsanurwa chekutadza kwese, tsvimbo ine mhangura ye14.2 mm inopona mushure mekuongororwa kwe40 kA yakazara ine chinhu chikuru chekuchengetedza.Ndosaka, pandinoverenga EPC spec inosvetuka zvakananga ku25 mm rods "for fault current," ndinobvunza kuti inguvai yekubvisa uye split factor yavaifunga - mhinduro inowanzova "hapana."
Nyevero imwe chete yekupisa inosara kusvika yawanikwa - bhachi. Matavi akanyorwa eUL 467 ane jira remhangura risingasviki 0.254 mm (10 mil), uye ini ndinoriona sepasi: mutsetse wedu unobata ≥0.254 mm pa ≥99.95% kuchena, zvakasimbiswa neCEPRI type test.
Danho rechitatu — Kureba vs. Dhayamita: Ndeipi Lever Inonyatsofambisa Kuramba kweGrid?
Kana cheki yekupisa yapera,Kugadzika pasi kweIEEE 80inova dambudziko rekudzivirira. Kune tsvimbo imwe chete yakamira muvhu rakafanana, equation yekudzivirira yestandard ndeye R = ρ/(2πL) × [ln(8L/d) − 1], nehurefu hwetsvimbo L mumamita uye dhayamita d mumamita. Logarithm ndiyo nyaya yese: urefu hunofambisa zvese zviri zviviri zvirevo zvemutsara nelog; dhayamita chete log. Pandinoimhanyisa paρ = 100 Ω·m netsvimbo yedu ye17.2 mm, ndinowana 70.6 Ω pa1.2 m, 50.7 Ω pa1.8 m, 39.9 Ω pa2.4 m, uye 33.1 Ω pa3.0 m.
| Kuchinja kwakaitwa patsvimbo | Kugadziriswa | Kudzivirira kwepasi | Kuderedza vs. hwaro | Mutyairi wemitengo |
|---|---|---|---|---|
| Kesi yekutanga | 17.2 mm × 1.5 m | 58.9 Ω | — | — |
| Kureba kaviri | 17.2 mm × 3.0 m | 33.1 Ω | ≈ 44% pasi | Huremu hwemhangura nesimbi ×2 |
| Dhayamita kaviri (L = 2.4 m) | 14.2 mm → 25 mm | 41.2 → 37.4 Ω | ≈ 9% pasi | Huremu hwemhangura nesimbi ×3 |
| Wedzera tsvimbo pa ≥ 1 × kureba | Matavi maviri e17.2 mm × 2.4 m | ≈ 40 → 22–26 Ω | ≈ 35–45% pasi | Tsvimbo + zvinobatanidza + simba rekutyaira |
| Kutyaira muvhu rakaderera | Ongororo yega yega yevhu rakarongwa | Zvakanangana nenzvimbo yacho | Kazhinji chifukidziro chikuru | Dhodhi rakadzika, tsvimbo dzinokwanisa kuwedzerwa dzakarukwa |
Chidzidzo chekuenzanisa cha2025 munaMDPI Applied Sciences (kuyera finite-element plus field measurements pa 400 V, 10 kV, uye 35 kV installations)Zvinosvika pamhedziso imwe chete yandinopa vatengi, kubva kudivi rekufananidzira: muvhu rinogara richidzivirira zvakanyanya, tsvimbo dzakamira dzakadzika dzinopfuura magadzirirwo asina kudzika nekuti dzinosvika pakubatana kukuru kwevhu, nepo magrid akatambanuka achisimudza simba guru pakupararira kwemagetsi emagetsi muyadhi yechiteshi. Chidzidzo ichi chinoratidzawo kudzikiswa kwekudzivirira kubva pakudzoreredza simba remagetsi zvakaita sebentonite kana kongiri inofambisa magetsi yakatenderedza electrode - chinhu chinoshanda kana usingakwanise kutyaira zvakadzika.
Nekuti kudzivirira kwevhu kunoderera zvishoma nezvishoma, tsvimbo yekutanga inofambiswa ye3.0 m ndiyo inoita basa rakawanda, uye chinhu chakanakira grid yepasi yevhu inenge iri "dhayamita yakajairika, kureba kwakanyanya kunofambiswa" pane "dhayamita yakakwira, kureba kwakajairika."Dhayamita ichiri kuwana kuchengetwa kwayo munzvimbo nhatu dzandinoongorora pane zvese zvinodiwa: kusimba kwesimba muvhu rakaoma kana rine matombo (tsvimbo ye16-19 mm inotsvedza isingasviki 14.2 mm padhiraivha ye3.0 m), kuvimbika kweshinda pakubatanidza kuti ikwanise kutambanudza, uye kubvumidzwa kwengura muvhu rine simba mukati memakore 40-50 ehupenyu hwedhizaini.
Chiyereso Chekuramba Tsvimbo Imwe Chete (IEEE 80 uniform-soil equation)
R = ρ/(2πL) × [ln(8L/d) − 1]. Saizi yekutanga chete — magadzirirwo ekupedzisira anoda nzira yakazara yegrid yeIEEE 80 nemuenzaniso wevhu wakayerwa.
Danho rechina - Kuverengwa kweTsvimbo, Kupatsanurwa, uye Kunonanga Tsvimbo Chaizvo
Muhurongwa hwese hwandinoongorora, grid re substation rinotanga nemaconductors uye rods rinotevera. MuWind farm BoP reference geometry — 40 m × 65 m, 4–7 m conductor spacing, 0.5–0.8 m kuviga — matanda anofambiswa ane 3 m anoenda paperimeter nekiyi midziyo, achiita mabasa maviri: kugeda grid resistance muvhu rakadzama uye kusimbisa makona apo mesh voltage inosvika. Mutemo wangu we spacing kune vatengi unoramba wakachengetedzeka uye uri nyore: Ndinochengeta matanda ari pedyo akaparadzana netsvimbo imwe chete, nekuti matanda anofambiswa ari pedyo kupfuura kureba kwawo anogovana magoko e resistance anopindirana uye marara emhangura. Gwaro rekugadzira reKeentel Engineering rinopa pfungwa imwechete ye perimeter-first uye rinotaura kuti kana ivhu risina kudzika rikaramba kushanda pamwe chete, matsime anofambiswa akadzika anogona kuparadzira simba guru re fault — imwe nyaya yakanyorwa yainoti yakasunda 62% yekupararira kwemagetsi mu electrode yakadzika.
Ndinovhara ongororo yega yega yegrid spec ne surface layer. Ma equation eIEEE 80 anoshivirira-voltage anopa dombo rakapwanyika nekuti resistivity yaro ye2,000–10,000 Ω·m iri pakati pebhutsu dzemushandi nevhu remuno; magadzirirwo akajairika anomhanya 3,000–5,000 Ω·m paukobvu hwe 0.1–0.2 m. Muenzaniso wakashanda weWind farm BoP unoyera zviri panjodzi: kubvisa matombo uye tolerable touch voltage muyadhi ye110 kV inodonha kubva pa1,314 V kusvika pa222 V - pasi pe 880 V mesh voltage yakaverengerwa, zvichireva kuti yadhi inokundikana.Nekuti dombo rinowanza muganho unobvumidzwa kakati wandei nepo grid ichibata voltage chaiyo pasi, gadziriro yetsvimbo yepasi ye substation haimbopedzwi kusvika mumwe munhu ava netsvimbo yematombo.
Zvatinogadzira Tichishandisa Nhamba Idzodzo
Mainjiniya anosarudza dhayamita nehurefu; basa rangu nderekuona kuti tsvimbo inosvika inoenderana nepepa rekuongorora. Pafekitori yedu yeXinchang ndinotarisira divi rekutumira kunze kwenyika remutsetse unogadziratsvimbo dzesimbi dzakasungirirwa nemhanguramu 14.2–25 mm dhayamita uye 1.2–3.0 m kureba, ine electroplated copper layer ≥0.254 mm pa ≥99.95% kuchena pamusoro pesimbi ine kabhoni shoma (~0.15% C). Ma mechanicals anokosha pa 3.0 m drive: tinobata simba rekudhonza ≥580 N/mm², kutwasuka mukati me 1 mm/m, uye kona ye 27.5° ± 2.5° point, uye batch yega yega inopona 90° bend pa 100 mm radius pasina kutyoka kwemhangura kana kukwesha - nzira yekukundikana inouraya tsvimbo dzakachipa muvhu rine matombo.
Kune ma "run" anotambanudzwa nekudzika anowedzera - mushonga wekudzidza weMDPI unodzivirira zvakanyanya - wedutsvimbo dzesimbi dzakasungirirwa nemhangura dzakagadzirwa nesimbi yemagetsibatanidza zvikamu zve 1.2 m kuita ma electrodes e 3–6 m pasina kurasikirwa nehunhu hwejaketi pajoini. Kana spec ichida nzira yakasiyana yekuisa plating, iyotsvimbo yepasi yakaputirwa nemhanguradhayamita yacho inofukidza hwindo rakafanana, uye dhayamita yacho yesechikamu chetsvimbo yepasiinonyora musanganiswa wega wega wehurefu hwedhayamita yatinayo. Kugona kwayo kunosvika zvidimbu zviuru makumi mashanu pamwedzi, zvichitumira EXW, FOB, CIF, kana DDU kubva kuNingbo kana Shanghai.
Chikumbiro chega chega chiri pamusoro apa chinotsigirwa nemapepa: ISO 9001 factory system, UL 467 listing, uye CEPRI type-test report inosanganisira ukobvu hwemhangura, kunamira, uye mashandiro ekukombama. QC yedu yemukati inoshandisa mageti matanhatu kubva kusimbi inouya kusvika kuinotanga kutumirwa, uye zvinyorwa zvebatch ndizvo zviri kuseri kwenhamba dzandinotora muchinyorwa chino. Kana spec yako ichida kutsauka - kureba kusinganzwisisike, majaketi akakora, kuyedzwa kwevaya vanoonekwa - ndiyo hurukuro yatinayo vhiki rega rega, uye unogona kutanga nayo pawebhusaiti yedu.peji rekuonana.
Zvitatu Zvisina Kubvumidzwa zveRFQ Zvandinotumira Kuvatengi
Chinhu chinodhura zvikuru chinosiya simba ndicho chinopatsanurwa. MaRFQ mazhinji andinovhura anotaura kuti magetsi ari kukanganisa — ngatitii 40 kA — uye hapana chimwe chinhu, izvo zvinomanikidza kuti tsvimbo neconductor zvese zvive saizi sekunge 40 kA yakazara inopinda mugrid. Hazvidaro.Nekuti waya dzesimbi netambo dzinotakura simba remagetsi kubva kunobva magetsi, chinhu chakanyorwa chisina simba remagetsi chinoumba mhangura yakawanda zvakapetwa kaviri kusvika kashanu kupfuura iyo yadhi inogona kupa simba.— Bentley Systems' worked case inoisa manhamba chaiwo pairi: 22 kA of fault, 691 A mugrid. Saka mhinduro yangu yekutanga kune chero RFQ haisi quotation; chikumbiro chemanhamba mana: 3I₀, X/R ratio, primary uye backup clearing times, uye split factor kana shield-wire configuration inodiwa kuti iiverenge. Vatengi vane ma spec vanowana defensible spec; vatengi vasingawane conservative column, uye vanobhadhara ne copper.
Chinhu chechipiri chakasara ivhu rakafanana nevhu. Mutsetse unoti "ivhu rinodzivisa: 100 Ω·m" unondiudza kuti mumwe munhu akavhura bhuku rekushandisa, nekuti bhuku raBentley rinotaura zvakajeka kuti nzvimbo dzinodzivirira zvakafanana hadziwanikwe kazhinji, uye ivhu rechando rechando rinosundidzira simba rekudzivirira zvakanyanya. Ndisati ndazvipira kureba kwetsvimbo, ndinobvunza Wenner four-pin traverses - nzvimbo dzakasiyana-siyana, dzakapatsanurwa kusvika padivi refu regrid, dzinenge 76 m kune yadhi ye 40 m × 65 m. Ongororo inosarudza kana uchida 2.4 m tsvimbo, 3.0 m tsvimbo, kana tambo dzinokwanisa kuwedzerwa muchikamu chakadzika; katalogu haigone.
Chechitatu chinosiyiwa ndechezvinhu zviviri zvekuchengetedza zvisina munhu. Imwe nzira yekubatanidza: siya zvisina kutaurwa uye kontrakita anoisa chero ma clamp ari parori, uye jointi imwe chete ine ngura inova nzvimbo inonyanya kufarirwa neIEEE 80 calculation isina kumbofungidzirwa - ndosaka ndinonyora exothermic welding mumutsara weRFQ wakafanana netsvimbo. Imwe i crushed-rock layer, iyo procurement inoiona se landscaping nepo tolerable-voltage math ichiiona semidziyo yekuchengetedza: bvisa uye muenzaniso we 110 kV wakashanda unodonha kubva pa 1,314 V inoshivirira kusvika pa 222 V uchipesana ne 880 V mesh voltage. Kupfuura izvi zvitatu, RFQ ichiri kuda zvinhu zvayo zvetambo - dhayamita, kureba, copper layer ≥0.254 mm, tensile ≥580 N/mm² - pamwe nezvikamu zvitatu zvebvunzo yekuyedza zvakafukidzwa muFAQ iri pazasi.
Mibvunzo Inowanzo bvunzwa
Ndeipi dhayamita yetsvimbo yepasi inowira padanda repasi re substation yakawanda?
Mumagadzirirwo andakaita, dhayamita ye16–19 mm (5/8–3/4 in) ine hurefu hwe2.4–3.0 m inofukidza nzvimbo zhinji dzekutumira nekuparadzira. Masvomhu ekupisa haawanzo kumanikidza dhayamita - tsvimbo ye14.2 mm inotopfuura 40 kA, 1 s - saka vatyairi vari kutyaira kuomarara, saizi yekubatanidza shinda, uye corrosion allowance. Ndinotora 17.2 mm seyakajairika - inobvisa 5/8 mu thread class uye inotyaira 3.0 m yakatwasuka.
Chimuti chakareba kana kuti chakakora chiri nani here pakuderedza kuramba kwegrid?
Yakareba, inenge nguva dzose — kureba kaviri kubva pa1.5 m kusvika 3.0 m kunoderedza kuramba kwevhu ne44% muvhu rakafanana re100 Ω·m, ukuwo dhayamita kaviri kubva pa14.2 mm kusvika 25 mm kunocheka ne9% chete. Kana dombo richidzikamisa kudzika, wedzera tsvimbo panzvimbo imwe chete kana kushandisa bentonite backfill, iyo ongororo ye2025 MDPI Applied Sciences inoratidza kuti ichiri kuderedza zvine musoro.
Ingani fault current inoyerera ichipinda muground grid?
Chikamu chakapatsanurwa chete — kazhinji 20–50% paKeentel Engineering's design guide, uye dzimwe nguva zvishoma. Bhuku reBentley Systems rekuongorora grounding rinoshanda ne22 kA phase-A fault apo 691 A chete ndiyo yaiyerera nepakati penzira zvichiita kuti grid's ground potential rise; shield ways necable sheaths zvaitakura zvimwe. Ndokusaka split factor kubva kugrounding study iri muRFQ yako usati wakurukura nezve rod dayamita.
Ko IEEE 80 inoda simbi dzakasungirirwa nemhangura here, kana kuti mhangura yakasimba?
IEEE 80 inoenderana nekushanda kwayo — inoisa zvinodiwa pakupisa, kuramba, uye kubata/danho, kwete chigadzirwa. Simbi yakasungirirwa nemhangura yakava tsvimbo yepasi yepakutanga nekuti simbi yepakati inopa simba rekutyaira rekuisa 2.4–3.0 m nepo jekete remhangura riine magetsi uye rinodzivirira ngura; UL 467 inoita kuti jekete repasi re 0.254 mm rive repamutemo. Mhangura yakasimba inotyaira zvisina kunaka muvhu rakaoma; simbi yakasungirirwa inorasikirwa nepfungwa yekuora.
Matavi anofanira kurovererwa pakadzika zvakadii, uye anofanira kuparadzaniswa zvakadii?
Mumagadzirirwo andinotsigira, tsika yakajairika ndeye 2.4–3.0 m tsvimbo pasi pegrid yakavigwa 0.5–0.8 m kudzika, netsvimbo dziri pamucheto nenzvimbo dzemidziyo mikuru, dzakaparadzaniswa kanenge imwe chete kubva padanda rimwe chete kuitira kuti magokora adzo ekudzivirira asapindirane. Kana ongororo yevhu ichiratidza danda repamusoro rinodzivisa pamusoro pehudzamu hwemhepo inofambisa mvura, tsvimbo dzinotambanudzwa dzinokubvumira kuti utyaire 6 m kana kudzika - ongororo yekuenzanisa yeMDPI inosimbisa kuti tsvimbo dzinofambiswa nemhepo dzakadzika ndidzo dzakasimba zvikuru muvhu rinodzivirirwa nemhepo zvakanyanya.
Matavi epasi ega anogona kugadzirisa nzvimbo inodzivirirwa zvakanyanya here?
Hazvisi nguva dzose, uye kuvimbika pano kunochengetedza mari. Kana masvomhu evhu rakafanana akasasvika pachinangwa, manera akaonekwa ndeaya: maelectrode anofambiswa nemhepo yakadzika, tsvimbo dzakawanda dziri padanho rakakodzera, conductive backfill (bentonite kana conductive concrete, yakanyorwa muongororo yeMDPI), uye pakupedzisira matsime evhu akadzika - Keentel anotaura nezvenyaya apo electrode yakadzika yakatakura 62% ye fault current dispersion. Rods ndiyo first lever yakachipa, asi soil model ndiyo inofanira kusarudza rung.
Ndeapi magwaro ebvunzo andinofanira kukumbira kubva kumusika wemidziyo yevhu?
Matanho matatu: runyorwa (UL 467 kana rwakaenzana) rwunoratidza kirasi yechigadzirwa; bvunzo yemhando yepamusoro - yedu ndeyeCEPRI - inovhara ukobvu hwedanga remhangura, kunamira, uye kukotama; uye zvinyorwa zvebatch-level zvinoratidza mhangura ≥0.254 mm, tensile ≥580 N/mm², uye 90° kukotama pa100 mm radius pasina kukwesha. Kana mutengesi asingakwanise kugadzira zvese zvitatu, hauna humbowo hwekuti tsvimbo ndiyo iri kutaurwa nedatasheet.
Kuenzanisa saizi yegrid ye substation neIEEE 80 izvozvi?
Nditumirei fault current yenyu, clearing time, split factor, uye soil model — ndichadzoka mukati mezuva rimwe chete rekushanda nerumbidzo ine urefu hwedhayamita, masvomhu ari shure kwayo, uye quotation.Tanga hurukuro papeji redu rekutaurirana →
Ini ndinotarisira kutengeswa kwezvinhu pasi uye kudzivirira mheni kubva kufekitori yedu yeXinchang, ndichiongorora magadzirirwo eIEEE 80 substation neEPC nevatengi vemagetsi munyika dzinopfuura makumi mana.
Nguva yekutumira: Nyamavhuvhu-06-2026