Recent content by BearB

Thanks for the reply. The limit is .4ma. Yesterday on a Downturn we changed out the Pads that are located below the strip. The Pads are a neoprene type material that the strip touchs sometime. The HVPS readings this morning on the bottom are .02ma. Possible there were bits on metal imbed in...

I have question about an Electrostatic Strip Oiler (ESO) used to coat oil on a steel continuous strip. The ESO has a High Voltage Power Supply for the top set of oil valves and High Voltage Power Supply (HVPS) for the Bottom set of oil valves. All has been operating OK until about 2 weeks ago...

jraef, the 3 2400v motors and starters (installed in the 60's) will be replaced by the 2 VFD and 480v motors and drives

We are using a 35# water system and a 100# water system pulling the water from a clear basin that we store in it after we clean it from the river. We are using 3 2400v pumps to operate the system. We are using a PRV to bring the system down to 35#. This is a Paper Making facil. and 3 of the 4...

Thanks jraef for the input.

I would like to thank this site and all that contribute. I am working with a pump company at our company installing 2 vertical water pumps. The motors will be 100hp, 480v & 150hp, 480v. I have a choice for the VFD's: AB Power Flex 400 or the Eaton Cutler Hammer SVX9000. I have used the AP...

I would like to thank this site and all that contribute. I am working with a pump company at our company installing 2 vertical water pumps. The motors will be 100hp, 480v & 150hp, 480v. I have a choice for the VFD's: AB Power Flex 400 or the Eaton Cutler Hammer SVX9000. I have used the AP...

Follow up to the VFD intermit fault. It has been 7 days of cont. operation since the transformer was installed without issue. I am getting the transformer installed perm. today on schedule maintenace. The VFD VDC Buss Voltage displayed on the drive is now showing around 635-655 before...

Checked parameters early in problem, all ok. No caps. or inductive switching around device. DickDv I agree. I looked at the pump first then I posted for help and I temp. installed a iso. transformer 480-480 ahead of the drive yesterday when I posted the "follow up" post. It has been about 18...

This is a follow up from this problem. Thanks for the feedback, I extended the decel time to 6 seconds (double the time it was set at and operated for several years without problems, problem returned. This morning I set from ramp stop to coast stop, problem returned 1 out of 4 cycles. Again...

I will go over that part of the circuit. Thanks.

Thanks for the replies. This site is always a great resource.

Ozmsis Thanks LionelHutz I agree, the reason I increased the Decel from 3 seconds to 4 sec (maybe I should go more). I cannot figure out why it goes for days without issue then back to back cycles it faults. The Operators run it in auto, I verified by watching it when it happen and the...

I will investigate the power supply issue tomorrow if time allows. No other machines have been installed and we generate our own power. The utility plant has added 2 new turbines to increase cap. and sell power to the grid just about the time this problem started. I am not sure how to try to...

I have a VFD (AB Power Flex 70) operating a 5 hp motor controlling a progressive cavity pump pumping starch material. The system is set up to pump the material for a time then flush for a time after material is used from tank system cycles again to fill the storage tank. This system has been...