OkiePC
Lifetime Supporting Member
I have a customer with an old pump panel which uses autotransformer style reduced voltage starter. I have worked with wye/delta starters, but this is my first experience with this variation of reduced voltage starter. The old panel is a rusty mess so the plan is to replace it with a VFD to allow ramping up to speed and limiting the upper end. This is driving a 125 HP water pump supplying a distribution system (including water towers).
The word is that when they last ran the pump (more than a year ago) it blew up water lines so now they will not run it. There are two other pumps teed into their system that are 75HP and one of them has a soft starter. Right now, they only run the smaller pump on the soft starter.
I would expect that this is probably as simple as connecting the motor as shown in the "RUN CONN" diagram, carefully setting up the VFD parameters and starting it up with caution like any other pump. I do want to proceed with caution and would like to hear any input from the motor/drive experts.
Thanks!
Paul
The word is that when they last ran the pump (more than a year ago) it blew up water lines so now they will not run it. There are two other pumps teed into their system that are 75HP and one of them has a soft starter. Right now, they only run the smaller pump on the soft starter.
I would expect that this is probably as simple as connecting the motor as shown in the "RUN CONN" diagram, carefully setting up the VFD parameters and starting it up with caution like any other pump. I do want to proceed with caution and would like to hear any input from the motor/drive experts.
Thanks!
Paul