Shunt resistors yog ib qho tseem ceeb rau kev ntsuas qhov ntsuas tam sim no hauv cov ntsuas hluav taws xob. Lawv siv cov yam ntxwv tsis tshua muaj siab ntawm manganese- tooj liab alloy kom ua tiav qhov ntsuas tam sim no los ntawm kev ntsuas qhov ntsuas hluav taws xob hla lub resistor thaum tam sim no ntws los ntawm nws (Ohm Txoj Cai V=I × R). Lawv kuj yog tus nqi qis - tus nqi qis thiab hloov tau zoo heev hauv cov ntsuas hluav taws xob.
Tam sim no, kev lag luam feem ntau faib cov hluav taws xob ntsuas hluav taws xob shunt resistors raws li cov txheej txheem vuam, txheej txheem kev teeb tsa, cov qauv kev qhia tshwj xeeb, thiab qib raug. Ntau hom muaj qhov sib txawv tseem ceeb hauv cov txheej txheem, kev ua haujlwm, thiab cov xwm txheej siv tau, thiab txhua tus yuav tsum ua raws li lub teb chaws / kev lag luam cov qauv xws li JB / T 11722-2013 thiab DL / T 2345-2021.
Muab faib los ntawm cov txheej txheem vuam: brazed shunt vs. electron beam welded shunt
Qhov no yog kev faib tawm ntawm cov ntsuas hluav taws xob shunts raws li lawv cov txheej txheem tsim khoom, uas txiav txim siab cov khoom lag luam kev ntseeg siab, raug, thiab kev hloov pauv kub. Electron beam welding yog ib lub tshuab tshiab uas tam sim no hloov cov txheej txheem brazing ib txwm siv.
Brazed Shunt
1. Txheej txheem nta
Txuas los ntawm brazing cov ntawv manganin tsis kam mus rau lub davhlau ya nyob twg tooj liab siv cov khoom siv tsoos tsho, cov txheej txheem yooj yim thiab muaj cov nqi tsim khoom tsawg.
2. Cov yam ntxwv tseem ceeb
Muaj teeb meem ntawm kev tsim hluav taws xob hauv txheej txheej brazing. Lub manganin thiab tooj liab davhlau ya nyob twg yuav sib cais vim thermal expansion thiab contraction, ua rau ib tug kuj kub coefficient, nruab nrab kuj stability, thiab tsis muaj zog tiv thaiv - xob laim muaj peev xwm.
3. Daim ntawv thov Scenarios
Cov ntsuas hluav taws xob dav dav thiab cov ntsuas hluav taws xob qis nrog cov kev xav tau qis rau kev ntsuas qhov tseeb.
Electron Beam Welded Shunt
1. Txheej txheem nta
Tsis siv cov khoom siv brazing. Lub manganin thiab tooj liab davhlau ya nyob twg yog fused rau hauv ib thooj ntawm high - kub electron beam. Nws muaj cov kev xav tau siab heev rau kev purity ntawm manganin thiab tooj liab cov ntaub ntawv, nrog rau cov txheej txheem nruj precision.
2. Cov yam ntxwv tseem ceeb
Nws muaj qhov kub tsis tshua muaj coefficient, yuav luag tsis muaj kev tiv thaiv drift, thiab tsis muaj cua sov ntxiv los ntawm cov khoom siv brazing. Manganin thiab tooj liab davhlau ya nyob twg yeej tsis sib cais. Nws tuaj yeem hloov kho tau yooj yim rau Chav Kawm 0.5 hluav taws xob ntsuas, dhau qhov ntsuas 3000A / 10ms xob laim, thiab muaj zog oxidation tsis kam thiab muaj peev xwm dhau.
3. Daim ntawv thov Scenarios
Nruab nrab thiab siab - fais fab DC hluav taws xob ntsuas (them pawg, photovoltaics), industrial- qib hluav taws xob ntsuas, thiab cov ntsuas hluav taws xob sab nraum zoov hauv qhov dav - qhov kub thiab txias. Nws tseem yog qhov kev xaiv tseem ceeb rau kev sib xyaw DC hluav taws xob ntsuas hluav taws xob tam sim no.
Muab faib los ntawm txoj kev teeb tsa: ua - hauv kev sib xyaw shunt vs. sab nraud cais shunt
Qhov kev faib tawm no feem ntau tsom rau DC lub zog ntsuas hluav taws xob (tshwj xeeb tshaj yog rau cov chaw nres tsheb fais fab). Qhov sib txawv tseem ceeb nyob rau hauv seb lub shunt resistor yog kev koom ua ke nrog lub zog ntsuas lub cev, uas cuam tshuam ncaj qha rau lub ntsuas hluav taws xob, kev siv hluav taws xob, kev tiv thaiv - muaj peev xwm cuam tshuam, thiab kev ntsuas tag nrho. Qhov no kuj yog ib qho kev txiav txim siab tseem ceeb thaum xaiv cov ntsuas hluav taws xob rau cov chaw them nqi.
Sab nraud Split- hom Shunt
1. Cov yam ntxwv zoo
Lub shunt yog ywj siab ntawm lub ntsuas hluav taws xob lub cev thiab yuav tsum tau txuas nrog lub ntsuas hluav taws xob los ntawm kev ntsuas cov xov hlau. Kev sib cais ntawm qhov chaw sib cais thiab cov kab hluav taws xob yuav tsum tau npaj.
2. Cov yam ntxwv tseem ceeb
Txhawm rau txo qhov ntev -kev cuam tshuam kev ncua deb, siab -voltage teeb liab kis tau tus mob (75mV/50mV) feem ntau yog siv, ua rau muaj kev siv hluav taws xob ntau dua thiab tsim hluav taws xob (siv hluav taws xob mus txog 22.5VA hauv qab 300A ua haujlwm). Kev ntsuas qhov yuam kev yog superimposed los ntawm lub 'meter', shunt, thiab cov txheej txheem xaim, ua rau siab tag nrho cov kev ua yuam kev tsis meej (rau chav kawm 1.0 meter + Class 0.5 shunt, tag nrho qhov yuam kev tuaj yeem ncav cuag ± 1.5%). Nws muaj zog tiv thaiv -electromagnetic cuam tshuam muaj peev xwm.
3. Daim ntawv thov Scenarios
Thaum ntxov DC them pawg hluav taws xob ntsuas hluav taws xob, dual- phom DC them pawg, thiab lub zog cia ntsuas qhov xwm txheej nrog qhov xav tau qis rau qhov chaw teeb tsa.
Ua -hauv Integrated Shunt
1. Cov yam ntxwv zoo
Lub shunt yog ncaj qha mus rau hauv lub ntsuas hluav taws xob lub cev, uas tsis muaj lwm yam sampling xov hlau yuav tsum tau. Tsuas yog cov kab hluav taws xob sab nraud thiab cov kab sib txuas lus tsuas yog xav tau, ua rau kev xaim yooj yim heev.
2. Cov yam ntxwv tseem ceeb
Nws txais yuav qis -voltage signal kis (6mV). Lub shunt muaj tus nqi qis dua, thiab nws qhov kev siv hluav taws xob tsuas yog 1/12 ntawm qhov sib cais- hom (tsuas yog 1.8VA nyob rau hauv 300A ua haujlwm), muaj cov khoom siv hluav taws xob tsawg thiab tswj tau qhov kub thiab txias. Cov qauv txuas yog luv luv thiab kaw, tsis muaj qhov yuam kev ntxiv superposition, thiab qhov ntsuas qhov tseeb tuaj yeem ncav cuag Chav Kawm 0.5 ( yuam kev ± 0.5%). Nws muaj zog tiv thaiv- muaj peev xwm cuam tshuam thiab tuaj yeem paub txog kev sib xyaw ua ke los tiv thaiv kev cuam tshuam.
3. Daim ntawv thov Scenarios
Tshiab ib zaug - phom DC them pawg hluav taws xob ntsuas, siab -precision photovoltaic hluav taws xob ntsuas, thiab compact ntawm - tsheb / me me lub zog cia hluav taws xob ntsuas. Nws yog cov txheej txheem evolution ntawm DC hluav taws xob ntsuas.
3. Cov xwm txheej siv tau: Tus tshiab ib zaug - phom DC charging pawg zog ntsuas, siab -precision photovoltaic metering zog ntsuas, thiab compact ntawm -board / me- nplai lub zog cia lub zog ntsuas qhov taw qhia ntawm kev nce qib rau DC lub zog ntsuas.
Classified los ntawm cov qauv specifications: Standard FL series tam sim no shunts
Qhov no yog ib qho qauv qauv ntawm DC fais fab meter shunt. Cov ntsiab lus tseem ceeb tau muab faib ua FL-2 hom yooj yim thiab FL-29/FL-39 hom hluav taws xob siab, ob qho tib si uas muaj plaub lub ntsiab lus (sab nraud tam sim no terminals thiab sab hauv muaj peev xwm terminals), haum rau qhov sib txawv tam sim no thiab cov zis voltages.
1.FL-2 Hom:Basic mainstream qauv, raug chav kawm 0.5/1.0, tam sim no ntau yam 1A ~ 15000A, rated tso zis voltage xaiv muaj xws li 20mV, 30mV, 50mV, 75mV, 100mV (75mV yog tus qauv), kub nce tsawg dua los yog sib npaug rau 80℃hauv qab no 50A los yog sib npaug rau L. Haum rau feem ntau AC zog ntsuas thiab me me rau nruab nrab lub zog DC zog ntsuas;
2.FL-29 / FL-39 Hom:Ib qho kev txhim kho siab - zog version ntawm FL-2, tsim rau ultra- cov ntawv thov tam sim no siab tshaj 2000A. Nws nta lub siab - kub resistant insulated puag thiab muaj zog tshaj lub peev xwm, haum rau industrial ultra-siab zog DC metering daim ntaub ntawv;
3.Cov yam ntxwv dav dav:Tag nrho cov qauv siv manganese-tooj liab alloy tiv thaiv nplooj ntawv + tooj liab txuas, txhawb kev hloov kho qhov ntev, thiab qee cov tuam txhab tuaj yeem muab cov lus tshwj xeeb rau kev xa tawm, hloov mus rau txawv teb chaws lub zog ntsuas cov qauv.
Classified los ntawm qhov tseeb: 0.2 chav kawm / 0.5 chav kawm / 1 chav kawm shunts
Qhov kev faib tawm no yog ua raws li DL / T 2345-2021 tus qauv rau sab nraud shunts ntawm DC zog ntsuas. Cov chav kawm raug ncaj qha ncaj qha mus rau kev ntsuas qhov tseeb ntawm lub zog ntsuas hluav taws xob thiab tseem yog qhov ntsuas tseem ceeb rau lub Hoobkas tshuaj xyuas ntawm shunt.
Basic yuam kev txwv ntawm Shunt Resistors
| Load tam sim no (I) | Kev ntsuas ntsuas | Chav Kawm 0.2 | Chav Kawm 0.5 | Chav Kawm 1 |
|---|---|---|---|---|
| 0.01 Iₙ Tsawg dua lossis sib npaug I Less dua lossis sib npaug rau 0.05 Iₙ | Tom qab thermal stabilization ntawm shunt resistor | ±0.4% | ±1% | ±2% |
| 0.05 Iₙ Tsawg dua lossis sib npaug rau I Less dua lossis sib npaug rau 1.2 Iₙ | Tom qab thermal stabilization ntawm shunt resistor | ±0.2% | ±0.5% | ±1% |
1.Class 0.2 Shunt
Cov chav kawm siab tshaj plaws nrog qhov yuam kev tsawg tsawg raws li kev siv cov xwm txheej. Qhov cuam tshuam ntawm qhov kub thiab av noo hloov pauv ntawm qhov yuam kev yog tswj nruj me ntsis.Daim ntawv thov: Laboratory calibration, siab -precision industrial metering hluav taws xob ntsuas, thiab kev lis kev cai clearance metering hluav taws xob ntsuas.
2.Class 0.5 Shunt
Lub ntsiab precision chav kawm hauv kev lag luam.Daim ntawv thov: Civil/industrial AC hluav taws xob ntsuas, DC them pawg hluav taws xob ntsuas, thiab photovoltaic metering hluav taws xob ntsuas. Nws kuj yog tus qauv precision rau FL series shunts.
3.Class 1 Shunt
Tus nqi -cov chav kawm muaj txiaj ntsig zoo.Daim ntawv thov: Siab -tam sim no metering saum 5000A, daim phiaj hluav taws xob hluav taws xob ntsuas nrog qhov yuav tsum tau ua kom tsawg, thiab ntsuas hluav taws xob ib ntus.
Cov lus sib piv ntawm Core Hom rau Hluav Taws Xob Meter Shunts
Txhawm rau kom meej meej qhia txog qhov sib txawv ntawm ntau hom, cov hauv qab no muab piv rau plaub qhov tseem ceeb shunt resistors -brazed/electron beam welded (txheej txheem) thiab sab hauv / sab nraud (installation)-uas yog cov feem ntau siv hauv kev lag luam, raws li lawv cov kev ua tau zoo tseem ceeb.
| Sib piv Dimension | Manganin Hlau Shunt | Electron-Beam Welded Shunt | Sab nraud Discrete Hom | Internal Integrated Hom |
|---|---|---|---|---|
| Kub Coefficient | >50 ppm | < 30 ppm | - | - |
| 300 A Fais Dissipation (Piv txwv) | - | - | 22.5 V Nws | 1.8 VAV |
| Metering raug yuam kev | ±1% ~ ±2% | ±0.5% ~ ±1% | ± 1.5% (ntxiv) | ± 0.5% (tsis yog-sau) |
| Anti-Kev cuam tshuam muaj peev xwm | Nruab nrab | Muaj zog | Tsis muaj zog (ntev sampling leads) | Muaj zog (kev kaw lub teeb liab voj) |
| Tus nqi tsim khoom | Tsawg | Nruab nrab-siab | Tsawg (system- theem daws) | Medium (kev daws teeb meem) |
| Hom Daim Ntawv Thov Scenarios | General vaj tse hluav taws xob meters | Muaj / DC / dav - ntsuas kub lub zog ntsuas | Dual - phom DC ceev - them lub zog ntsuas | DC ceev - them / photovoltaic zog ntsuas |