Qhov kev kuaj poob qis - kuj hu ua luv luv - ntsuas qhov ntsuas hluav taws xob - ntsuas qhov winding tooj liab poob thiab poob ntawm lub zog hloov pauv. Tsis zoo li qhov tsis muaj -load test, lub load poob yog qhov kub thiab txias -nyob ntawm. Txhawm rau sib piv cov txiaj ntsig ntawm daim ntawv teev npe lossis cov qauv, koj yuav tsum kho qhov ntsuas qhov poob mus rau qhov ntsuas kub.
Phau ntawv qhia no piav qhia yuav ua li cas thiaj ua tau qhov ntsuas, yam tsis nkag mus, thiab kev kho qhov kub li cas.
Load Loss Test yog dab tsi?
Thaum lub sij hawm ib tug load poob xeem, ib tug winding yog luv luv -circuited, thiab ib tug txo voltage yog siv rau lwm winding kom txog thaum rated tam sim no ntws. Lub zog ntsuas raws li qhov xwm txheej no sib npaug ntawm qhov poob - feem ntau I²R poob hauv cov windings ntxiv rau kev poob qis hauv cov khoom siv.
Cov ntsiab lus tseem ceeb:
Ntsuas load poob (P)- active zog ntawm qhov ntsuas tam sim no thiab kub
Luv-circuit impedance voltage (Zk)- qhov voltage yuav tsum tau tsav tam sim no
Fais fab mov (cos φ)- feem ntau siab dua hauv qhov tsis muaj -load test
Cov Txheej Txheem
Ib yam li tsis muaj -load test, load test txhawb:
Peb -wattmeter txoj kev- rau peb -theem plaub-wire systems
Ob -wattmeter txoj kev- rau peb -theem peb-wire systems (feem ntau)
Tib -wattmeter txoj kev- rau ib zaug -theem transformers
Rau qhov kev xeem thauj khoom, qhov tsis yog -kuaj winding yuav tsum luv luv -circuited nrog hnyav, qis- tiv thaiv tooj liab tuav. Qhov luv -kev sib txuas ntawm qhov hluav taws xob thiab kev tiv thaiv kev tiv thaiv yuav tsum yog qhov tsis txaus ntseeg piv rau qhov hloov pauv winding tsis kam.
Kuaj teeb Parameters
Thaum teeb tsa kev xeem thauj khoom ntawm MOEORW-WBT43, nkag mus rau cov kev txwv no:
| Parameter | Lub ntsiab lus |
|---|---|
| Txoj kev txuas | Peb -watt / ob-watt / ib zaug -watt |
| PT ratio / CT ratio | Sab nraud transformer piv (1 yog tsis muaj) |
| Rated voltage | High -voltage rated voltage |
| Kuaj tam sim no | Tam sim no uas cov ntaub ntawv yuav tsum tau muab xauv |
| Tsawg- voltage ntsuas tam sim no | Rau kev kho cov ntaub ntawv |
| Rated peev | Transformer ntsuas muaj peev xwm |
| Rated voltage | High -voltage rated voltage |
| Siab -voltage winding kuj | Nruab nrab kab tsis kam ntawm HV winding |
| Tsawg-voltage winding kuj | Nruab nrab kab tsis kam ntawm LV winding |
| Ntsuas kub | Qhov ntsuas kub tiag tiag ntawm cov windings thaum lub sijhawm kuaj |
| Kev ntsuas kub | Qhov kub ntawm qhov poob yuav tsum raug kho (feem ntau 75℃lossis 120℃nyob ntawm tus qauv) |
Yog vim li cas thiaj yuav tsum tau kho qhov kub thiab txias
Winding kuj hloov nrog kub. Copper kuj nce kwv yees li 0.4% ib degree. Txij li thaum load poob yog dominated los ntawm I²R poob, qhov ntsuas poob ntawm chav tsev kub (20-30 degree) yuav qis dua tus nqi ntawm daim ntawv teev npe ntawm 75℃(rau qhuav- hom) lossis 120℃(rau roj-immersed).
Cov txheej txheem yuav tsum tau muab cov ntaub ntawv poob los ntawm kev siv qhov ntsuas kub. Yog tias koj tsis raug, koj daim ntawv xeem yuav qhia tias "tsawg poob" piv rau daim ntawv teev npe, uas zoo li qhov yuam kev.
Yuav ua li cas cov cuab yeej kho Load Poob
Lub MOEORW-WBT43 siv qhov nkag winding resistances thiab kub los ua ob qhov kev suav:
1. Kub-Kho Load Poob
Qhov ntsuas cais qhov ntsuas poob rau hauv:
I²R poob- proportional to winding resistance (kub-dependent)
Txoj kev poob- assumed ywj siab ntawm qhov kub thiab txias (los yog nrog qhov sib txawv kub coefficient nyob ntawm tus qauv)
Nws mam li kho qhov I²R tivthaiv los ntawm qhov ntsuas kub mus rau qhov ntsuas kub.
2. Kho luv luv-Circuit Impedance (Zk)
Qhov luv -circuit impedance kuj raug kho rau qhov ntsuas kub:
Zk=√[Zkt² + (Pkt / (10 × Sr))² + (Kt² − 1)]
Qhov twg:
Zkt yog qhov ntsuas impedance ntawm qhov ntsuas kub
Pkt yog qhov ntsuas qhov poob ntawm qhov ntsuas kub
Sr yog lub transformer rated peev
Kt yog qhov kho qhov kub thiab txias
Qhov tshwm sim yog luv luv -circuit impedance ntawm qhov ntsuas kub, uas yog tus nqi ntawm lub npe hu rau.
Cov txheej txheem xeem
Luv-circuit qhov tsis yog- sim winding nrog hnyav tooj liab tuav.
Ground lub transformer tank thiab qhov ntsuas.
Nkag mus rau tag nrho cov tsis tau teev saum toj no, suav nrog winding resistances thiab kub.
Maj mam nce cov regulator tso zis tam sim no.
Thaum qhov nruab nrab tam sim no ncav cuag qhov ntsuas tam sim no, lub ntsuas ntsuas cia li kaw cov ntaub ntawv nrog lub suab ceeb toom.
Sau qhov kho qhov poob thiab kho impedance.
Common Pitfalls
1. Tsis ntsuas Winding Resistance ua ntej Load Test
Koj xav tau qhov kev tiv thaiv winding qhov tseem ceeb los kho qhov kub thiab txias. Ntsuas qhov DC winding tsis kam ua ntej (nrog rau cais DC tsis kam tester), tom qab ntawd nkag mus rau qhov tseem ceeb rau hauv kev teeb tsa kev teeb tsa.
2. Qhov ntsuas kub tsis raug
Qhov ntsuas kub yuav tsum yog qhov ntsuas cua qhov tseeb, tsis yog qhov ntsuas huab cua puag ncig. Yog hais tias lub transformer tau zaum nyob rau hauv lub xeem bay, cia lub sij hawm txaus rau lub winding kub kom stabilize thiab phim lub ambient kub.
3. Qhov luv luv tsis txaus-Circuit Connections
Yog tias luv luv - cov kab hluav taws xob muaj qhov tsis zoo, lawv ntxiv I²R poob ntxiv rau qhov ntsuas, ua rau qhov ntsuas qhov poob qis dua qhov tseeb. Siv cov tooj liab tuab thiab ntxuav txhua qhov chaw sib cuag.
4. Tsis meej pem High-Voltage thiab Low-Voltage Rated Values
Kev ntsuas kev thauj khoom feem ntau yog ua nyob rau sab siab -voltage (feem ntau tam sim no los ntawm HV winding). Xyuas kom koj nkag mus rau HV ntsuas voltage thiab tam sim no kom raug.
Yam khoom
CovMOEORW-WBT43 transformer poob testercia li ua qhov kub thiab txias - kho load poob thiab luv -circuit impedance xam. Nws txhawb nqa tag nrho peb txoj kev xaim thiab sab nraud PT / CT rau lub zog loj transformers. Download tau cov ntaub ntawv los yog hu rau peb pab neeg engineering rau daim ntawv thov kev pab txhawb nqa.
