adccommunitymod (AutomationDirect) asked a question.
Created Date: December 28,2005
Created By: Harold Burkholder
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Help!: Several weeks ago we replaced a "blown up " VFD GE Fuji Drive for a customer with a Baldor ID15J205-ER VFD Drive. The application is for a 5 HP, 230 Volt, 12 Amp., 3450 Rpm motor driving a scrap blower / chipper. The wiring is in about 100 feet of EMT and THHN wire and the speed reference is from 2500 to 3450 RPM. Within a day the drive began to trip on a "Hardware Protection " fault, once every couple of days to several times a day. Baldor was not able to help us diagnose or solve the problem so we replaced it with an Automation Direct GS2-25PO VFD drive. We are monitoring the output with a Fluke Scopemeter in Trend-Plot Mode. Although the Auto-Direct Drive has not faulted we have noticed an occassional (once a day) output voltage spike of from 300 to 700 volts! Any ideas as to what is causing this and how to correct it? MOV's, Reactors, or what?? We are afraid these spikes may wipe out the Drive. Thanks Harold
Created Date: December 28,2005
Created by: Tech Guy
You are correct to be concerned about the spikes as they will eventually damage the drive.
If you do not have line reactors, then I would suggest that you add them to the system. Long wiring runs such as this can produce crosstalk as well as impedence issues. This could possibly cause spiking problems such as you are experiencing.
Created Date: December 28,2005
Created by: Harold Burkholder
Help!:
Several weeks ago we replaced a "blown up " VFD GE Fuji Drive for a customer with a Baldor ID15J205-ER VFD Drive. The application is for a 5 HP, 230 Volt, 12 Amp., 3450 Rpm motor driving a scrap blower / chipper. The wiring is in about 100 feet of EMT and THHN wire and the speed reference is from 2500 to 3450 RPM.
Within a day the drive began to trip on a "Hardware Protection " fault, once every couple of days to several times a day. Baldor was not able to help us diagnose or solve the problem so we replaced it with an Automation Direct GS2-25PO VFD drive.
We are monitoring the output with a Fluke Scopemeter in Trend-Plot Mode. Although the Auto-Direct Drive has not faulted we have noticed an occassional (once a day) output voltage spike of from 300 to 700 volts! Any ideas as to what is causing this and how to correct it?
MOV's, Reactors, or what??
We are afraid these spikes may wipe out the Drive.
Thanks
Harold