UNBALANCED LOAD READINGS FROM A SET OF 33KV CURRENT TRANSFORMERS

Usually an imbalance at one end but not the other means that something is wrong with the metering equipment at one end. Logically it would be the end where the imbalance is being detected.

To test this theory, you need to re-arrange the metering core by transferring them to a different phase, or reattach the lines to the loads while maintaining the correct phase direction. If the core is defective, the problem will follow the defective transformer. If the load is truly imbalanced, it will yield the same readings for each of the respective phases.

The end that measures a balanced load is very unlikely to have exactly the right defect to correct for an imbalanced load. But it is still slightly possible. Check both ends after you make the changes to see what shows up. You will be looking for what changed and how it changed with respect to what you did to change it.