Hauv kev lag luam fais fab, cov transformers ua haujlwm ua cov khoom tseem ceeb rau kev xa thiab faib hluav taws xob. Ob hom transformers, potential transformers (PTs) thiab voltage transformers (VTs), feem ntau siv sib pauv tab sis ua haujlwm sib txawv.

Tsab ntawv blog no yuav tshawb nrhiav txog qhov sib txawv ntawm cov PT thiab VTs, tsom mus rau lawv txoj kev tsim kho, kev siv, thiab kev ua tau zoo hauv cov kab ke hluav taws xob.

Dab tsi yog Voltage Transformer (VT)

Lub tshuab hloov hluav taws xob (VT) yog ib hom tshuab hloov hluav taws xob uas tsim los ntsuas qhov hluav taws xob hauv lub zog hluav taws xob. VTs siv rau hauv ob qho tib si qhov hluav taws xob qis thiab siab kom muaj kev nyab xeeb thiab raug saib xyuas cov theem hluav taws xob hauv lub voj voog. Cov tshuab hloov hluav taws xob no txo ​​qhov hluav taws xob siab ntawm lub voj voog tseem ceeb mus rau qib qis dua, muaj kev nyab xeeb dua uas tsim nyog rau kev ntsuas cov khoom siv lossis cov relays tiv thaiv.

Lub winding thawj zaug ntawm lub voltage transformer txuas nrog rau hauv parallel nrog lub circuit uas ntsuas, thaum lub winding thib ob muab cov zis voltage proportional. Qhov piv ntawm kev tig ntawm cov windings thawj zaug thiab thib ob txiav txim siab qhov piv ntawm voltage step-down.

Lub Transformer Muaj Peev Xwm (PT) Yog Dab Tsi?

Lub tshuab hloov pauv hluav taws xob (PT) yog tib lub cuab yeej zoo li lub tshuab hloov pauv hluav taws xob. Cov lus "hluav taws xob hloov pauv" thiab "hluav taws xob hloov pauv" feem ntau siv hloov pauv hauv kev lag luam fais fab. PTs yog cov cuab yeej tseem ceeb hauv kev ntsuas thiab saib xyuas cov theem hluav taws xob hauv ob qho tib si qis thiab siab voltage systems.

Ib yam li cov transformers voltage, cov transformers potential muaj ib lub winding thawj uas txuas nrog rau lub voj voog uas ntsuas thiab ib lub winding thib ob uas muab cov zis voltage qis dua. Qhov kev txo qis voltage no tso cai rau kev ntsuas thiab saib xyuas cov kab ke voltage siab kom muaj kev nyab xeeb thiab ua haujlwm tau zoo siv cov cuab yeej ntsuas voltage qis.

Qhov Txawv Tseem Ceeb Ntawm Cov Transformers Muaj Peev Xwm Thiab Cov Transformers Voltage

Txawm hais tias cov transformers muaj peev xwm (PTs) thiab cov voltage transformers (VTs) yog ob hom instrument transformers siv los txo cov voltages siab mus rau qib ntsuas tau, lawv muaj ntau qhov sib txawv tseem ceeb hauv kev ua haujlwm, qhov tseeb, kev tsim qauv, thiab kev siv.

muaj nuj nqi

Lub luag haujlwm tseem ceeb ntawm lub transformer muaj peev xwm yog los muab cov zis hluav taws xob uas txo qis raws li qhov nkag hluav taws xob siab, uas ua rau muaj kev nyab xeeb thiab raug ntawm cov hluav taws xob siab hauv cov kab ke hluav taws xob. Qhov sib txawv, cov voltage transformers yog tsim los muab cov zis hluav taws xob uas raug cais tawm ntawm cov hluav taws xob siab, ua rau lawv tsim nyog rau kev siv hluav taws xob tiv thaiv relays, meters, thiab lwm yam khoom siv hluav taws xob qis.

raug

Cov transformers muaj peev xwm tsim los muab kev ntsuas voltage raug heev, feem ntau nrog cov chav kawm raug txij li 0.1 txog 1.0 raws li cov qauv thoob ntiaj teb xws li IEC 61869-3. Ntawm qhov tod tes, cov transformers voltage muab qhov tseem ceeb rau kev rho tawm hluav taws xob dua li qhov ntsuas raug, nrog rau cov chav kawm raug ib txwm muaj txij li 1.0 txog 3.0 raws li IEC 61869-3.

Tsim Kho thiab Kev Tsim Kho

Cov transformers muaj peev xwm raug tsim los ntawm cov hlau nplaum zoo thiab cov windings kom txo qhov yuam kev thiab xyuas kom meej tias qhov ntsuas voltage raug. Lawv feem ntau muaj ntau lub windings theem ob los muab cov piv voltage sib txawv thiab pab txhawb kev sib txuas rau ntau yam khoom siv ntsuas. Qhov sib txawv, cov voltage transformers muaj tus qauv yooj yim dua tsom mus rau kev muab kev rho tawm hluav taws xob txhim khu kev qha. Lawv yuav muaj ib lub secondary winding thiab raug tsim nrog cov ntaub ntawv rwb thaiv tsev uas haum rau qib voltage xav tau.

daim ntawv sau npe

Vim lawv qhov tseeb siab, cov transformers muaj peev xwm feem ntau yog siv rau hauv kev siv ntsuas, xws li kev ntsuas lub zog hauv cov chaw hloov pauv, cov chaw tsim hluav taws xob, thiab cov chaw lag luam. Lawv muab cov kev ntsuas hluav taws xob kom raug rau kev them nqi, kev saib xyuas load, thiab kev tshuaj xyuas qhov zoo ntawm lub zog. Cov voltage transformers, nrog rau lawv qhov kev tsom mus rau kev rho tawm hluav taws xob, feem ntau yog siv rau hauv cov ntawv thov tiv thaiv relaying, qhov twg lawv muab cov teeb liab voltage rau cov khoom siv tiv thaiv xws li overcurrent relays, deb relays, thiab cov phiaj xwm tiv thaiv raws li voltage, kom ntseeg tau tias kev ua haujlwm zoo ntawm cov kab ke hluav taws xob.

Kev Zoo Sib Xws Ntawm Cov Transformers Muaj Peev Xwm thiab Cov Transformers Voltage

Ob leeg yog Transformers

Hauv lawv lub plawv, cov transformers muaj peev xwm (PTs) thiab cov voltage transformers (VTs) yog ob hom transformers. Lawv ua haujlwm raws li lub hauv paus ntsiab lus ntawm electromagnetic induction, qhov twg ib qho alternating tam sim no hauv lub winding thawj zaug ua rau muaj qhov voltage proportional hauv lub winding thib ob. Qhov no tso cai rau lawv kom txo cov voltages siab mus rau qis dua, cov theem tswj tau yooj yim dua uas tsim nyog rau kev ntsuas cov cuab yeej lossis cov relays tiv thaiv.

Kev ntsuas ntawm kev ntsuas hluav taws xob

Cov PTs thiab VTs yog tsim los ntsuas qhov hluav taws xob hauv cov kab ke hluav taws xob. Lawv muab cov lus qhia luv luv ntawm qhov hluav taws xob tseem ceeb, tso cai rau kev saib xyuas thiab kev txheeb xyuas cov theem hluav taws xob kom raug yam tsis tas txuas ncaj qha rau cov khoom siv ntsuas rau cov voj voog hluav taws xob siab.

Kev rho tawm thiab kev tiv thaiv

Lwm qhov zoo sib xws tseem ceeb ntawm PTs thiab VTs yog lawv lub peev xwm los muab kev cais tawm thiab kev tiv thaiv. Tus qauv tsim transformer cais cov thawj thiab theem nrab windings, tsim kom muaj kev thaiv rwb thaiv tsev. Qhov kev cais tawm no tiv thaiv cov cuab yeej ntsuas thiab cov neeg ua haujlwm los ntawm cov hluav taws xob siab uas muaj nyob hauv lub voj voog thawj zaug. Los ntawm kev cais tawm lub voj voog thib ob, PTs thiab VTs txhim kho kev nyab xeeb thiab tiv thaiv kev puas tsuaj rau cov khoom siv rhiab heev.

Kev Sib Txuas Lus

Cov PTs thiab VTs ua haujlwm ua ib qho kev sib txuas ntawm cov kab ke high-voltage thiab cov cuab yeej ntsuas lossis cov relays tiv thaiv. Lawv tso cai rau cov khoom siv no txuas nrog lub voj voog qis-voltage secondary, ua kom muaj kev ntsuas thiab saib xyuas cov yam ntxwv hluav taws xob raug. Lub transformer lub secondary winding muab qhov chaw sib txuas zoo thiab yooj yim rau cov cuab yeej xws li voltmeters, watt meters, thiab relays, pab txhawb kev saib xyuas thiab tswj hwm lub kaw lus zoo.

Cov Qauv Sib Piv

Ob qho tib si PTs thiab VTs muaj nyob rau hauv cov qauv voltage ratios. Cov ratios no txhais tau tias kev sib raug zoo ntawm cov thawj thiab theem nrab voltages. Cov piv txwv feem ntau suav nrog 110V / √3: 110V / √3 thiab 110V / √3: 100V / √3. Cov piv txwv txheem ua kom ntseeg tau tias muaj kev sib raug zoo nrog cov cuab yeej ntsuas thiab tso cai rau kev ntsuas voltage sib xws thoob plaws ntau yam hluav taws xob.