On Fri, 15 Mar 2019 13:28:51 -0700, wrote:

On Fri, 15 Mar 2019 13:32:31 -0500, Jon Elson
wrote:

On Fri, 15 Mar 2019 10:09:03 -0700, etpm wrote:


Besides power factor correction does the line reactor do anything
else that might prevent any problems? Such as stopping any noise that
might interfere with and CNC machines that are wired into the same
circuit breaker panel?
Yes, I had a few pieces of computer-type gear that were affected by a VFD
on my CNC mill. I put a heavy-duty commercial line filter box on it, and
all the interference went away. This is an LC filter, not just a reactor.
I found a suitable filter in my junk.

Jon
Thanks Jon. As it happens I have an LC filter I removed from an old
CNC mill. Made by RK Electric. There is a schematic on the front that
shows three 220 ohm resistors all connected together at one end in a
star formation. The other end of each resistor is connected to a .47
mfd cap. From the other end of each cap is a wire. The device is rated
at 600 volts. I don't know how to use it but I imagine it is just
connected across the three incoming power wires. With single phase can
just any two wires be used?
Thanks again,
Eric
I meant Wye connection. Looking online I see that it is a surge
suppressor. Oops. Anyway, it shows the device connected across the
motor wires. They do sell single phase ones too and I may have a
couple. The manual shows the reactor being connected to the incoming
power leads so I guess an LC filter should be too. Especially since
the VFD manual says to not connect anything across the output.
Switches and capacitors are specifically mentioned.
Eric