5 TESTING OF TRANSFORMER.pptx

Testing of Power Transformer

1. TESTING OF TRANSFORMER BY MANISH N PANDYA Director, MECPL - VADODARA

2. LIST OF TEST PERFORMED IN TRANSFORMER INSULATION RESISTANCE AND POLARIZATION INDEX OPEN CIRCUIT TEST SHORT CIRCUIT TEST VECTOR GROUP CONFIRMATION MAGNETIC BALANCE TEST WINDING RESISTANCE TAN DELTA TEST SFRA TEST

3. IR VALUE AND PI CALCULATION USE OF TEST : 1) FINDING HEALTHINESS OF INSULATION CALCULATION OF POLARIZATION INDEX IS MOST IMPORTANT IT IS A RATIO OF INSULATION RESISTANCE VALUE OF 1 MIN TO 10MIN

4. OPEN CIRCUIT TEST USE OF TEST : 1) FIND MAGNETIZING CURRENT 2) VOLTAGE RATIO

5. SHORT CIRCUIT TEST USE OF TEST : 1) FIND SHORT CIRCUIT IMPEDANCE 2) CURRENT RATIO % Z =  

6. VECTOR GROUP TEST USE OF TEST : VERIFICATION OF VECTOR GROUP

7. VECTOR GROUP COMBINATION

8. MAGNETIC BALANCE USE OF TEST : VERIFICATION OF MAGNETIC BALANCE OF CORE

9. MAGNETIC BALANCE R PHASE Y PHASE B PHASE 100% 60% to 80% 40% to 20% 50% 100% 50% 40% to 20% 60% to 80% 100% MEASURED VOLTAGE PERCENTAGE

10. WINDING RESISTANCE

11. TAN DELTA TEST OF WINDING

12. TAN DELTA TEST OF BUSHING SHORT LINK

13. TAN DELTA TEST OF WINDINGS

14. SFRA (SWIFT FREQUENCY RESONANCE ANALYSIS) TEST

15. SFRA TEST KIT SETUP

16. SFRA TEST MEASUREMENT FUNDAMENTAL

17. SFRA TEST SIGNATURE WITHOUT PROBLEM

18. SFRA TEST SIGNATURE WITH PROBLEM