The instrument-ratio accuracy stated in the specifications is guaranteed for electromagnetic-type VTs.
If a lower accuracy is acceptable, the same tester can also be used for capacitive VTs.

Use 50 Hz when testing CVTs to improve accuracy; leave the frequency on “Auto” for electromagnetic VTs.

Newer
Self checking method for whether the instrument power supply is abnormal
Back to list
Older How to solve large ratio-measurement errors with the transformer tester?

Related projects