Overview of ESP control program
The Electric submersible pump (ESP) control program is a drive application program
used in oil pump stations and other related areas that require pumping of viscous
liquids.
Note: The ESP control program is active only in Remote control mode.
Backspin supervision
Backspin supervision set of functions can be used to monitor the status of
pump-motor shaft after production operation is interrupted. The function prevents
undesired premature restart of the pump before fluid column is sufficiently drained.
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Restart delay
The Restart delay function prevents any new start command for a period of time
set in parameter 74.21 after stop command is initiated. The function prevents
accidental pump restart at least for the given amount of time. ABB recommends
that you always enable restart delay and keep it active for several minutes even if
the backspin speed observer function is enabled.
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Backspin speed observer
Backspin speed observer function can be used to monitor the actual speed of the
motor in real time, in case spinning passively due to fluid column drainage down
through the pump.
The drive must be in stopped state during backspin speed observer operation.
When enabled, it automatically activates motor speed supervision after the restart
delay time is elapsed. The function ignores the user start command and prevents
46 ESP program features
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