Doc No. 006-0211-00 Rev AK Page 16 of 33
Testing the ESP Sensor While Installing Tubing
Megger testing motor and cable
The motor and cable may be Megger tested if required using the following guidelines:
The output voltage of a Megger will exceed the breakdown voltage of the protective
MOV mounted on the fuse block. The MOV will conduct if a Megger is used, giving
incorrect readings. Disconnect the three-phase choke and fuse block from the motor
cable before testing. Do not Megger test the downhole equipment while any of the
surface components are connected to the motor power cable.
NOTE: MEGGER TEST THE SENSOR IN REVERSE POLARITY ONLY!!
LIMIT MEGGER VOLTAGE TO 5KV MAX
Follow the steps below to test the gauge through the ESP cable spool once the cable
has been connected to the motor.
Since the SCOUT is powered by 110 VAC, an external power supply will be
needed.
ONLY CONDUCT THIS CHECK WHILE THE SPOOL IS NOT MOVING.
NEVER AT ANY TIME STEP OVER THE 3 PHASE ESP CABLE.
1. Connect the signal wire to one of the exposed copper conductors on the 3 phase
ESP cable.
2. Connect the ground wire to the exterior lead shielding of the ESP cable.
3. Power on the Surface Readout.
4. Record the parameter readings on the ESP Sensor Checklist given in the
Appendix of this Manual.
5. It is recommended to continue monitoring the sensor by verifying downhole
sensor readings with a Sercel-GRC Surface Readout approximately every 1000ft
(~33 joints).
Figure 15: Spooling Unit
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