Qhov voltage piv ntawm transformer (xws li qhov sib piv transformation) yog qhov piv ntawm qhov siab -voltage winding voltage U1 mus rau qhov qis-voltage winding voltage U2 thaum lub transformer tsis muaj {{4} }load, uas yog, qhov hloov pauv piv k=U1/U2. Lub transformation ratio test ntawm transformer yog ib qho kev ntsuam xyuas los xyuas seb lub transformer puas tuaj yeem ua tiav qhov kev hloov pauv hloov hluav taws xob thiab seb qhov kev hloov pauv hloov pauv puas tau raws li qhov hloov pauv lossis tus nqi teev nyob rau ntawm daim ntawv teev npe. Lub hom phiaj yog los xyuas seb tus naj npawb ntawm cov lem ntawm txhua qhov winding, kev sib dhos ntawm cov hlau lead, thiab qhov taw qhia txoj hauj lwm ntawm tus kais hloov pauv raws li qhov yuav tsum tau ua; thiab muab lub hauv paus rau seb lub transformer puas tuaj yeem ua haujlwm nrog rau lwm cov transformers. Kev ua haujlwm sib luag ntawm cov khoom me thiab nruab nrab- qhov loj me transformers nrog qhov sib txawv ntawm 1 feem pua yuav ua kom muaj qhov sib txawv ntawm 10 feem pua ntawm cov ntsuas tam sim no hauv transformer windings, thiab qhov poob ntawm qhov ntsuas transformer yuav nce ntau, uas tsis zoo rau lub transformer.
In the process of power transformer production, user handover and maintenance test, the transformer ratio test is a must-do item, which can effectively supervise the quality of the transformer products during delivery and use, and prevent the transformer from short circuit, open circuit, connection error, and voltage regulation. Internal switch fault or contact fault.
Automatic ratio tester tus qauv:
The reference standard of the automatic ratio tester is DHT963-2005. The "Regulations" stipulate the standards for the ratio test of all taps of transformer windings:
1. Muab piv nrog tus nqi ntawm daim ntawv teev npe, qhov kev hloov pauv ntawm txhua tus kais dej yuav tsum tsis txhob sib txawv, thiab yuav tsum ua raws li txoj cai.
2. Rau transformers nrog ib tug voltage qis dua 35kv thiab ib tug transformation ratio ntawm tsawg tshaj li 3, qhov tso cai sib txawv ntawm qhov transformation piv yog 1 feem pua, thiab qhov tso cai sib txawv ntawm cov rated kais transformation piv ntawm tag nrho lwm yam transformers yog 0. 5 feem pua. Qhov kev hloov pauv ntawm lwm cov kais dej yuav tsum nyob rau hauv feem pua tus nqi ntawm qhov hloov pauv impedance voltage tsawg dua 1/10, tab sis tsis ntau tshaj 1 feem pua.
Transformer piv ntsuas yuav tsum tau ua nyob rau hauv tag nrho cov kais dej. Rau ntawm -load voltage regulating transformers, cov khoom siv hluav taws xob yuav tsum tau siv los kho qhov kais dej. Rau peb -winding transformers, tsuas yog kev hloov pauv ntawm ob khub ntawm windings yuav tsum tau ntsuas. Feem ntau, qhov kev hloov pauv ntawm lub tshuab cua nrog lub kais hloov pauv thiab lwm qhov ob lub windings yog ntsuas. Rau windings nrog tus kais hloov pauv, qhov hloov pauv ntawm txhua qhov kais dej yuav tsum ntsuas.