1. BAKER EQUIPMENT RELIABILITY
Juan Herrera Rivera
DIAGNOTEC LTDA.

2. Initial Situation
Pump with 12% imbalance in new well. Pump motor rewind in Chile. Approximately 12 amps for transformer neutral. Customer blames company that made the winding.

3. POWER CONNECTION

4. Status of Measures
Dynamic testing is done to pump deep well (M1) showing high current unbalance. Booster pump is tested, taken from the same bar (M2), but there were no major imbalances. It tests the momentum and to pump ohmic resistance (M1) to obtain balance in both tests.

5. DEEP WELL PUMP

6. DEEP WELL PUMP

7. BOOSTER PUMP

8. DEEP WELL PUMP

9. SITUATION AFTER TESTS
There being no booster pump problems discard problems upstream of CCM.
Potential problem arises in the CCM.
Power connections are changed in the external terminal to know if the problem continues with the phase of CCM or motor phase. The result is that it goes with the motor phase.

10. SITUATION AFTER TESTS
Report is made ​​in response, that based on information provided by the instruments, there is a problem in the wiring of the motors.
Customer does not accept this option but decided to test the pumps with short cables and full load in a test. Results: Approximately 2% of unbalance

11. ACTIONS
the structure of the cable it is reviewed, whereas no grounding Shield..
In consultation with the parent company of the pump manufacturer, we decided to distribute the cables at 120 ° geometry, between each phase.
Results: Approximately 2% in current imbalance.

12. CONCLUSIONS
The phenomenon occurred over there, had the magnetic origin by the effect of cables.
The use of both Baker instruments, Explorer II Series and D 12 R were highly reliable enough, to solve the problem.
It could have saved direct costs and lost profits.