Koj xaiv lub transformer tam sim no rau kev ntsuas tam sim no li cas? - Blog

Thaum xaiv ibtam sim no transformer(CT), nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo xav txog ntau yam kev ntsuas thiab kev ua haujlwm kom muaj kev nyab xeeb, raug, thiab txhim khu kev qha. Cov hauv qab no yog cov kev xaiv tseem ceeb:

1. Xaiv qhov ntsuas qhov tseem ceeb tam sim no

• Kev xaiv yuav tsum yog raws li qhov kev khiav hauj lwm tam sim no ntawm Circuit Court raug ntsuas. Feem ntau, qhov kev khiav hauj lwm tam sim no yuav tsum yog kwv yees li 60% ntawm qhov ntsuas thawj tam sim no, tab sis nws yuav tsum tsis txhob poob qis dua 30%, txhawm rau txhawm rau ntsuas qhov tseeb.

• Yog tias qhov tseeb tam sim no poob qis dua 30%, txiav txim siab xaiv lub CT uas muaj cov thawj winding kais lossis ib qho uas muaj qhov ntsuas qis dua; Tsis tas li ntawd, xav txog kev siv CT tshwj xeeb tsim los rau siab dynamic thiab thermal stability.

2. Xaiv qhov Rated Secondary Tam sim no

• Feem ntau siv nyob rau theem nrab tam sim no yog 5A thiab 1A.

• 5A: Feem ntau siv rau hauv cov ntawv sau ib txwm siv; haum rau cov xwm txheej uas cuam tshuam nrog kev sib kis luv luv thiab cov khoom siv hluav taws xob ntau dua.

• 1A: Haum rau ntev - kis tau tus mob nyob deb, cov cuab yeej hluav taws xob / kev tiv thaiv hluav taws xob, kev sib txuas lus, thiab lwm yam, vim nws pab txo qis hluav taws xob hauv qhov hluav taws xob thib ob.

• Thaum xaiv, xyuas kom meej tias qhov kev xaiv thib ob tam sim no sib haum nrog cov kev xav tau ntawm cov khoom siv qis qis qis (piv txwv li, lub zog ntsuas, tiv thaiv relays, thiab lwm yam).

3. Kev xaiv ntawm Rated Transformation Ratio

• Rated Transformation Ratio=Rated Primary Current / Rated Secondary Current (xws li 100/5A, 400/5A, thiab lwm yam).

• Qhov piv txwv no yuav tsum tau txiav txim siab raws li qhov ntsuas tam sim no ntawm thawj sab thiab xaiv thib ob tam sim no, thaum tseem suav nrog qhov xav tau ntau yam ntawm kev hloov pauv kom ntseeg tau tias muaj kev nyab xeeb txaus.

4. Kev Xaiv Cov Qib Siab (Precision Class)

• Cov chav kawm sib txawv raug xaiv raws li daim ntawv thov tshwj xeeb:

• Metering (Energy Measurement): Feem ntau yuav tsum muaj chav kawm 0.2S lossis 0.5S (siab precision, siv rau kev lag luam nqi lossis kev ntsuas qhov tseeb).

• Kev ntsuas (qhia ntsuas ntsuas): Feem ntau siv Chav Kawm 0.5 lossis Chav Kawm 1.

• Kev Tiv Thaiv (Relay Protection): Feem ntau siv Class 5P, 10P, lossis PR-chav tiv thaiv transformers; lub hom phiaj tseem ceeb ntawm no yog ntawm cov yam ntxwv ntawm lub sijhawm thiab kev ntseeg siab, tsis yog qhov tseeb tiag.

• Ib qho kev hloov pauv tam sim no tuaj yeem ua ntau yam windings, tshwj xeeb rau kev ntsuas, ntsuas, thiab kev tiv thaiv kev ua haujlwm, txhua qhov sib txawv ntawm cov chav kawm raug sib txawv.

5. Rated Output (Load Capacity) lossis Secondary Load Impedance

• Tag nrho cov impedance ntawm cov twj paj nruag, relays, thiab lwm yam khoom siv txuas nrog rau sab thib ob yuav tsum tsis pub dhau lub nra hnyav (feem ntau hais hauv VA) tso cai rau lub transformer tam sim no ntawm nws cov chav kawm raug.

• Yog hais tias lub load impedance ntau dhau, nws yuav ua rau muaj kev ua yuam kev nyob rau hauv lub transformer tam sim no, yog li cuam tshuam kev ntsuas qhov tseeb lossis kev ntseeg siab ntawm kev ua haujlwm ntawm kev tiv thaiv.

6. Kev ntsuas hluav taws xob

• Qhov ntsuas voltage ntawm atam sim no transformer(CT) yuav tsum ua raws li qhov ntsuas hluav taws xob ntawm daim phiaj hluav taws xob ntawm nws qhov chaw teeb tsa -piv txwv li, 10 kV, 35 kV, 110 kV, thiab lwm yam.

• Qhov ntsuas hluav taws xob no yog hais txog qhov ntsuas kab hluav taws xob ntawm CT qhov chaw teeb tsa, tsis yog qhov loj ntawm thawj qhov tam sim no.

7. Txoj kev Mounting thiab cov qauv tsim

• Xaiv hom qauv tsim nyog raws li qhov tshwj xeeb ntawm -site installation tej yam kev mob:

• Pass-los ntawm Hom (Busbar Type): Tsim nyog rau cov ntawv thov uas lub tsheb npav hla ncaj qha los ntawmCT.

• Ncej Hom: Feem ntau siv rau kev teeb tsa ruaj khov hauv cov khoom siv hloov pauv.

• Hom Bushing: muab tso rau hauv siab - cov khoom siv hluav taws xob, xws li hloov pauv bushings.

• Phab ntsa-los ntawm Hom: Tsim los rau kev teeb tsa los ntawm phab ntsa lossis muab faib, ua haujlwm rau ob qho tib si insulating thiab txhawb nqa.

• Tsis tas li ntawd, chav nyob tau muab faib ua hom sab hauv lossis sab nraum zoov; kev xaiv yuav tsum tau ua raws li qhov chaw ua haujlwm.

8. Rwb thaiv tsev hom thiab tiv thaiv chav kawm

• Raws li kev teeb tsa ib puag ncig (hauv tsev / sab nraum zoov), kev ua qias tuaj, qhov siab, thiab lwm yam, xaiv cov khoom uas muaj cov txheej txheem rwb thaiv tsev tsim nyog thiab ** chav tiv thaiv (xws li, IP ntsuas).

9. Cov yam ntxwv hloov pauv (Tshwj xeeb yog rau kev tiv thaiv-Class Instrument Transformers)

• Rau cov cuab yeej hloov pauv siv hauv kev tiv thaiv relay-tshwj xeeb tshaj yog cov phiaj xwm kev tiv thaiv sai (xws li kev tiv thaiv sib txawv)- tshwj xeeb yuav tsum tau them rau lawv cov yam ntxwv ntawm qhov tsis sib xws, zaus teb, thiab cov tsis zoo sib xws. Xaiv ib hom uas ua tau raws li kev tiv thaiv tshwj xeeb, xws li PR-chav kawm (Protection, Transient) ntsuas ntsuas.

10. Cov Lus Qhia Tshwj Xeeb

• Yog hais tias lub kaw lus muaj feem xyuam rau kev khiav hauj lwm tshwj xeeb -xws li lub xub ntiag ntawm harmonics, impulse loads, los yog DC Cheebtsam - xaiv cov twj ntsuas transformers muaj peev xwm ua raws li cov kev cai tshwj xeeb.

• Hauv cov chaw nres tsheb digital, tej zaum yuav tsim nyog siv ElectronicTam sim no Transformers(ECTs), uas txawv ntawm cov tsoos electromagnetic instrument transformers.