B
After one week of operation w/o problems started getting 'DC bus high 7xx VDC' errors (where 7xx is DC bus trip voltage) as soon as KM1 line contactor closes for an I-R Nirvana VFD. Anybody else ever run into this?
Recently installed a model IRN200H-2S, 200HP Ingersoll-Rand Nirvana air compressor.
It is fed from a PMT which also serves a process line equipped with various and sundry inverter and servo drives, but with a largish Eurotherm 590 DC drive (didn't look, but on the order of 500 HP) driving an extruder screw. All of the drives on the production line have suitably sized line reactors installed, including the EU590.
The Nirvana drive itself is equipped with an I-R part number 38036877 line reactor.
A Fluke Scopemeter shows extruder drive notching on the waveform at the Nirvana VFD line supply. The interesting thing is the notching gets *worse* as soon as the Nirvana air compressor VFD is brought across the bus. I'm told that (so long as it doesn't knee-cap itself with the high DC bus voltage error upon initial energization) the drive runs fine.
Today was my first intro to the problem, and I haven't talked to their tech support people, but I'm guessing the Nirvana VFD initializes at zero speed command, just happens to be regenerating back to the line at very nearly the same point on the AC cycle the extruder is notching, and is somehow messing with the Nirvana's DC trip detection.
Has anyone run into related problems with this particular unit (or I-R Nirvana VFD drives in general), and can shed some light on it?
My understanding is I-R pretty much wants to wash their hands of the situation (... "it's a plant power problem ..." ) so part two of the question is what remediation makes the most sense. Should I look into a high power active tracking filter?
Recently installed a model IRN200H-2S, 200HP Ingersoll-Rand Nirvana air compressor.
It is fed from a PMT which also serves a process line equipped with various and sundry inverter and servo drives, but with a largish Eurotherm 590 DC drive (didn't look, but on the order of 500 HP) driving an extruder screw. All of the drives on the production line have suitably sized line reactors installed, including the EU590.
The Nirvana drive itself is equipped with an I-R part number 38036877 line reactor.
A Fluke Scopemeter shows extruder drive notching on the waveform at the Nirvana VFD line supply. The interesting thing is the notching gets *worse* as soon as the Nirvana air compressor VFD is brought across the bus. I'm told that (so long as it doesn't knee-cap itself with the high DC bus voltage error upon initial energization) the drive runs fine.
Today was my first intro to the problem, and I haven't talked to their tech support people, but I'm guessing the Nirvana VFD initializes at zero speed command, just happens to be regenerating back to the line at very nearly the same point on the AC cycle the extruder is notching, and is somehow messing with the Nirvana's DC trip detection.
Has anyone run into related problems with this particular unit (or I-R Nirvana VFD drives in general), and can shed some light on it?
My understanding is I-R pretty much wants to wash their hands of the situation (... "it's a plant power problem ..." ) so part two of the question is what remediation makes the most sense. Should I look into a high power active tracking filter?