Instrument Transformers muaj ob hom:
1.Tam sim no Transformer (los yog Series Transformer)
2.Potential Transformer (los yog Parallel Transformer)
Tam sim no transformers yog siv thaum qhov loj ntawm AC tam sim no tshaj qhov muaj txiaj ntsig ntawm kev ntsuas tam sim no.
Muaj peev xwm hloov pauv tau siv qhov hluav taws xob ntawm AC Circuit Court tshaj 750 V vim tias nws tsis tuaj yeem muab cov rwb thaiv tsev tsim nyog ntawm kev ntsuas ntsuas rau qhov hluav taws xob ntau dua li qhov no.
CURRENT TRANSFORMER (CT) txhais
1. CTs yog siv los txo / nqis nqis ac tam sim no los ntawm tus nqi siab dua mus rau tus nqi qis rau kev ntsuas / tiv thaiv / tswj. Qhov nruab nrab tam sim no yog 5 A rms
2. CT theem nrab tam sim no muaj qhov sib npaug rau thawj qhov tam sim no thiab sib txawv hauv theem ntawm nws los ntawm qhov zoo tshaj xoom degree.
Txoj cai ua haujlwm
1.A CT ua haujlwm nrog tib lub hauv paus ntsiab lus ua haujlwm ntawm hluav taws xob fais fab transformer tab sis ntawm no yog qee qhov sib txawv.
Yog hais tias lub zog hluav taws xob transformer lossis lwm lub hom phiaj transformer, thawj qhov tam sim no sib txawv nrog cov khoom thauj lossis cov tam sim no thib ob.
2. Nyob rau hauv rooj plaub ntawm CT, thawj tam sim no yog qhov system tam sim no thiab qhov tseem ceeb tam sim no lossis qhov system tam sim no hloov mus rau CT theem nrab, yog li theem nrab tam sim no lossis lub nra tam sim no nyob ntawm thawj qhov tam sim no ntawm transformer tam sim no.
Qhov ua rau yuam kev hauv CT
Nyob rau hauv zoo tagnrho CT
Kev hloov pauv qhov tseeb Kc=tig piv Kt thiab lub kaum sab xis yuav yog xoom. tab sis vim muaj kev txwv lub cev muaj nyob rau hauv hluav taws xob thiab sib nqus ckt, kev ua yuam kev tau tshwm sim.
Yog vim li cas:
1.CT rub magnetising tam sim no Im muab kev zoo siab mmf xav tau los ntawm thawj winding los tsim flux
2.CT rub lub zog tam sim no los muab cov ntsiab lus poob (eddy tam sim no thiab hysterisis poob) + hluav taws xob I2R poob. Yog li lub zog poob tivthaiv
Ie yuav tsum tau muab cov kev poob uas cuam tshuam nrog flux thiab cuam tshuam culoss hauv winding vim yog qhov zoo siab tam sim no Io hauv thawj winding
3.Flux density nyob rau hauv cov tub ntxhais yog tsis linear muaj nuj nqi ntawm magnetising quab yuam. Yog li ct core tau saturated.
4.Muaj ib txwm muaj qhov sib nqus nqus
Yuav txo qhov yuam kev hauv Transformer tam sim no li cas
1. Siv cov tub ntxhais ntawm cov permeability siab thiab qis hysteresis poob cov khoom sib nqus.
2. Khaws lub nra hnyav kom ze rau tus nqi ntawm lub nra tiag tiag.
3. Ua kom qhov tsawg kawg nkaus qhov ntev ntawm txoj kev flux thiab nce qhov ntu ntu ntawm cov tub ntxhais, txo qhov sib koom ua ke ntawm cov tub ntxhais.
4. txo qis sab hauv impedance
Kev ntsuam xyuas ntawm tam sim no transformers
Hom kev xeem raws li IS
Cov kev ntsuam xyuas hauv qab no yog hom kev xeem
a) Kev txheeb xyuas cov cim davhlau ya nyob twg thiab polarities
b) cov kev xeem luv luv tam sim no
c) ntsuas kub nce
d) impulse voltage xeem ntawm thawj
e) lub zog zaus voltage tiv thaiv kev sim ntawm thawj
f) kev ntsuas yuam kev
g) overvoltage inter-tig test
Kev ntsuam xyuas niaj hnub raws li IS
Cov kev ntsuam xyuas hauv qab no siv rau txhua tus neeg CT
a) Kev txheeb xyuas cov cim davhlau ya nyob twg thiab polarities
b) high voltage fais fab zaus-voltage tiv thaiv kev xeem ntawm theem nrab
c) inter-tig overvoltage test
d) kev txiav txim siab ntawm qhov yuam kev thiab cov chav kawm raug
--- Kev txiav txim ntawm kev xeem tsis yog tus qauv, tab sis kev txiav txim siab ntawm qhov yuam kev yuav tsum tau ua tom qab lwm qhov kev xeem
Kev kuaj tshwj xeeb
Cov kev sim nram qab no yog ua raws li kev pom zoo ntawm
manufacturers thiab buyer:
a) tws xob laim impulse xeem
b) Kev ntsuas lub peev xwm thiab dielectric dissipation yam
c) ntau qhov sib tw impulse xeem ntawm thawj winding
d) mechanical tests
e) Kev ntsuas ntawm kev xa tawm dhau-voltage
Wuhan huayi hluav taws xob hluav taws xob thev naus laus zis tab tom tsim thiab tsim cov khoom siv sim rau txhua yam ntawm cov khoom siv tam sim no. Peb muab cov khoom zoo thiab kev daws teeb meem rau koj. Tiv thaiv thiab tswj koj cov CTs.