The VFD is ABB, I'm hoping there is an expert on these drives.
If the pump stops under load the discharge pressure is maintained by a check valve. On restart the motor is unable to pull away under pressure, I suspect this may be something to do with the current VFD setup.
No the motor and drive are at a remote site, I haven't been there.
Parameter 2101 set to 8 (Ramp) is that right for a constant torque load?
Are there any other parameters important for this sort of load?
Someone suggested We need an oversize VFD for this type of load.
Thanks in advance.