VFD Location
VFD Location
(OP)
Is there any difference on locating VFD's close to their loads or can they be located +100' from their loads. I had read at one time that there was an issue when working with VFD'and the cable lenght,etc.
Is this correct or is this no longer applicable with new generation VFD's
Is this correct or is this no longer applicable with new generation VFD's






RE: VFD Location
NC
RE: VFD Location
Search this site for lots and lots of discussion of this topic.
RE: VFD Location
If vfd mounted locally, noise problems are a lot less. Usually reactors are not needed due to the noise levels are low due to the short vfd power runs to the motor. Making changes to VFDs that are not centrally located can be a pain.
Expense in making an enclosure for each individual VFD instead of a central panel.
On the flip side you have to bring your control wiring out to the vfd from your main plc panel.
Centrally located
Have to look hard at cable runs to the motors, line reactors needed, special conduit runs or shielded cable needed. Grounding is critical
VFD programming is easier due to location in one panel
If you have your drives on Devicenet, I thought this was nice but the added expense of the interface card adds costs.
RE: VFD Location
RE: VFD Location
If you are in the US then you are probably ok, nobody seems to care about EMC and nobody seems to fit filters..another long discussion.
RE: VFD Location
Frustrating...
RE: VFD Location
RE: VFD Location
I am reviewing manufacurer drives O&M books to find distance data,but nothing yet.
I google the site but found limited data, still searching.
RE: VFD Location
I should have added your point that there are a few diligent folk in the US who are fully aware of the issues of EMI and that until it becomes law, then it will go by the wayside.
It has frustrated me in the past dealing with the US, China and other countries not bound by the law that imply that as there is no law then there is no problem...
joan271273: let the forum know your drive type and you could get an answer straight away. There are people here who work (or have worked) for the majority of VFD companies.
RE: VFD Location
I am dealing with ABB drives
RE: VFD Location
Steve
RE: VFD Location
http:/