Hi all,
first we detected 9Amp current in grounding conductor fed to electrical control panel, where did it come from, before we got chance to solve the mystery, now we have another AC drive failed. it is GE AC drive AV300i, mounted on the chassis inside the electrical panel (where 9A is detected from ground cable)
GE AC drives have the power amplifier board mounted on the top of heat sink, that is mounted on the top of chassis.
GE drive is not cheap, and this is the second time the same typies of drive failed. To clarify, here is sequence of event:
-E-stop is trigged
-motor brake (external mechanical brake) is engaged
-motors come to stop
-reset E-stop
-run the cycle from the beginning of step one (no ride through)
-certain drive is inoperable
there is no fault code can be retrived, since the operator panel is blank
,unknown cause indeed, or i am missing some crucial clues that aid diagnosis.
this is the second time the same type of drive failed, inside the same electrical panel(fed with 3 phase, star secondary, ), my feeling is that without identifying the cause of failure, we are set to deal with another drive failure down the road,
I do recognize that drive may leak current if insulation is deterioted, we dozen of drives of AC GE 300i (3-5hp), likely drive is failed by external factors, so what are they?
Does the event of failure occurs at the sudden stop or the drive, or the re-start of drive after the power resume. can we collect clues from damaged power module? has anyone done board level repairing?
I understand there are group of players having profound experience wth troubleshoot drive failure, so come on, what should i do, to prevent another instance of drive failure??
I know lots of you have lots of experience in drive control, please go ahead, let me have it.
first we detected 9Amp current in grounding conductor fed to electrical control panel, where did it come from, before we got chance to solve the mystery, now we have another AC drive failed. it is GE AC drive AV300i, mounted on the chassis inside the electrical panel (where 9A is detected from ground cable)
GE AC drives have the power amplifier board mounted on the top of heat sink, that is mounted on the top of chassis.
GE drive is not cheap, and this is the second time the same typies of drive failed. To clarify, here is sequence of event:
-E-stop is trigged
-motor brake (external mechanical brake) is engaged
-motors come to stop
-reset E-stop
-run the cycle from the beginning of step one (no ride through)
-certain drive is inoperable
there is no fault code can be retrived, since the operator panel is blank
,unknown cause indeed, or i am missing some crucial clues that aid diagnosis.
this is the second time the same type of drive failed, inside the same electrical panel(fed with 3 phase, star secondary, ), my feeling is that without identifying the cause of failure, we are set to deal with another drive failure down the road,
I do recognize that drive may leak current if insulation is deterioted, we dozen of drives of AC GE 300i (3-5hp), likely drive is failed by external factors, so what are they?
Does the event of failure occurs at the sudden stop or the drive, or the re-start of drive after the power resume. can we collect clues from damaged power module? has anyone done board level repairing?
I understand there are group of players having profound experience wth troubleshoot drive failure, so come on, what should i do, to prevent another instance of drive failure??
I know lots of you have lots of experience in drive control, please go ahead, let me have it.