Tb woods e-trac x2c manual
Thank you everyone for the input. There is probably a way to run it by providing DC directly to the bus , but I am not going to mess with that now. JST- now that you mention it, I do recall that the servo motor power supply is ungrounded. This is for just one machine. The transformer is located right next to the enclosure that holds the VFD, so I am just going to hook it up and not worry about grounding any of the high side legs. If you are ONLY going from the transformer into the drive, never anywhere else, that is not a distribution system, you are fine in that respect.
Delta power distribution is basically unheard of outside of North America, they think we are nuts to do it. So first off, you MUST read the manual of the drive to see if it says you can use it on a Delta network, many cheap ones will tell you no. If it does say its OK, then there should be instructions on how to modify the drive so that it doesnt get damaged. VFDs have a network of surge suppressors called MOVs on the front end protecting the diodes and those will be connected in a Wye with a reference to ground, which helps protect against common mode noise coming in from the source.
If you connect in Delta, you will have to remove the ground reference point of those MOVs, otherwise THEY try to become the Wye point of your supply and burn out within days, leaving the drive unprotected at all, which eventually leads to failure. Others, mostly European, make it possible, but often difficult Siemens and ABB make you partially disassemble the drive for example. Some Asian mfrs ignore it altogether and just tell you no, or tell you nothing and let you suffer the consequences.
But now they are owned by Vacon, a Finnish company, and the newer versions require difficult mods. The Eurotherm drives, from my experience, are real bears to modify for Delta, they didn't consider us in their designs at all.
My two cents: First - definitions: You've reversed your transformer, therefore I will refer to what used to be the secondary as the primary, and what used to be the primary as the secondary. For me it's all about conventional power flow direction, i. Therefore, to follow what I'm saying here use this convention. Clear as mud? Therefore, connect the 'secondary' in a delta configuration for the voltage required.
According to the data plate you've pictured the transformer mfg has already decided on the delta configuration for you. As for the 'primary' side the mfg has again made the decision for you only this time it's wye connected.
If it's a terminal leave it OPEN. As long as you have over current protection and a disconnecting means on the 'primary' side there's no reason for over current protection on the secondary side if going directly to the load. As an aside if you connect X0 and then ground one of the delta legs you will create an imbalance and cause the transformer to burn out. Therefore, let them float. As for DC bus voltages. I'm not altogether sure you will have success with this project using a phase converter to power the VFD.
I have ZERO experience with this, but have installed a few static and rotary units and always noted a leg with low voltage until the driven motor was loaded. Some VFDs may shut down due to phase loss error. Replacement WILL cost less, replacement of the output transistors will cost less as well should there be a failure.
Good luck. Originally Posted by Jraef. Schneider is a French company. Volume production was moved to Indonesia years ago for the small versions, but it's probably the same design. So it was designed for the North American market, but you will have to remove the ground reference on the MOVs.
You can get manuals on line very easily. Heaven help you if you want to program that thing without a manual, and even with the manual for that matter.
The drive itself had some nice features, but I found it to be the most unnecessarily complicated manual on the market. It was originally written in French, then translated to English. I think that has a lot to do with it. Jraef-- I looked inside the drive and did not see any components like you describe. It has 3 MOV's line to line but nothing ,that I could tell, connecting line to ground.
It was made in and the manual is silent on the subject, so I went ahead and fired it up. It seems to work OK, I will keep my fingers crossed. I did not pay much money for it so It won't be the end of the world if it smokes. It also appears to work on single phase. I did not try it under load but, if I am lucky, I might only need to use the phase converter for heavy cuts. I will be monitoring the temperature. WayneC -- Thanks for your input The x0 neutral is disconnected from the transformer frame and taped up like you said it should be.
I would prefer to have a volt VFD but that is way out of my budget. I have all the frames and enclosures well connected to the green earth ground wire. I had the date wrong- a board had a date on it but the unit was made in ,only 12 years old.
I did do the whole reforming reforming of the capacitors procedure, so there was no luck involved! Coming from a design point of view, I am not at all sure what I would do differently for a drive expecting a delta vs a wye source.
Both have the exact same voltages in the drive. No differences line-to-line. About all I can think of is the line to ground voltage, which might be different But for a V line, the transient withstand is going to need to be well up in the kilovolt range in any case, so "drift" and transients shouldn't be a big deal. Even the MOVs are no issue for an ungrounded source. And most reputable firms will do a wye of MOVs with one more to ground from the wye point, so as to avoid most of the problems you seem to be describing.
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