The Water Boy
Member
- Join Date
- Oct 2003
- Posts
- 13
We have an application using Siemens MM430 200hp drives running variable-speed water pumps. The pumps maintain level in a hotwell, 1 drive running at a time. A drive will run for up to 9 days at a time and then fault, normally on overvoltage. We have line reactors installed (before we installed them the drives would trip every 2-3 days instead of every week.) The load side cables are around 100 feet long, which would seem short enough not to require load reactors, but could I be wrong on this?
Ramp times are about 15 seconds to full speed up and down, and the drive ranges from about 38-42 hz, this over the course of 5-10 minutes. All the parameters in the drive use the exact data from the motor nameplate. We have 3 drives and they are all set up the same, and all acting the same.
We took out the voltage boosting functions to try and combat this, to no avail. Does anyone have other ideas we could consider?
Ramp times are about 15 seconds to full speed up and down, and the drive ranges from about 38-42 hz, this over the course of 5-10 minutes. All the parameters in the drive use the exact data from the motor nameplate. We have 3 drives and they are all set up the same, and all acting the same.
We took out the voltage boosting functions to try and combat this, to no avail. Does anyone have other ideas we could consider?