Introduction
Test cases for transformer testing on-site
Mobile transformer test system WV
– General
– Possible extensions
– Technical background
Summary
WHY TESTING ON SITE ?
Routine test report of the factory may not provide sufficient information about the internal condition of the transformer after installation
Transformer conditions after a repair job
Diagnostics during the life time
Possibilities for transformer manufactures to built up their service department to a second mainstay of their businesses
WHAT TO TEST ON SITE ?
Load and no-load losses
Induced voltage test
Applied voltage tests
TEST OF THE NO-LOAD LOSSES
Check the transformer after a repair job or maintenance
According to the IEEE 57.12.90: total harmonic distortion THD ≤ ۵% is acceptable
Martin Buschendorf
