I was looking at the owners manual for a Jet 1840 online and it stated that it cannot be ran on a GFCI circuit. And the diagram shows a 6-15 receptacle is used. Does anyone know why it cannot be used on a GFCI circuit.
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Jet 1840 ElectrIcal
- Thread starter Steve Kephart
- Start date
We tried to use a 120 volt VFD on a GFCI circuit and it kept tripping so we had to move it. I've heard of others with the same problem.
Not sure it relates to 230V but it sounds like it.
As for the 6-15 receptacle, I think it's shipped with a 15amp 230V plug installed.
Not sure it relates to 230V but it sounds like it.
As for the 6-15 receptacle, I think it's shipped with a 15amp 230V plug installed.
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Inverters generate a lot of "hash" (electrical noise resulting from the high speed high power digital switching). This noise would present itself between neutral and ground and would have sufficient amplitude to interfere with proper operation of the GFCI.
On a 240 volt circuit this noise is probably seen as a common mode signal on the two high legs.
That explains it. I did look at the Jet 1640 and it states the same for a GFCI. I looked at the Manual for the Laguna 1836 and it made no mention of a GFCI problem. Thanks for the help.
Every lathe with a VFD can have issues with a GFCI. That information just doesn't get into the manual. The internet is ripe with people asking why their GFCI trips when they use a lathe. Been an issue for years!
As Bill mentioned above the GFCI sensing circuit measures the changes in any currents between the neutral and the ground, the GFCI needs to preform this task quickly which is similar to the switching design of the VFD control circuit that controls the voltage and frequency to the motor. The GFCI senses these voltage and current patterns and identifies them as a fault. VFD's can throw a lot of noise back onto the electrical system which can cause other issues. To avoid these problems it is a common practice to install line and load reactors at the VFD to prevent this electrical noise from migrating back onto the electrical system.
Thanks everyone. The reason for my question was that I wanted to get a new circuit in my shop for my soon to be new lathe [if I can make up my mind]. I wanted to confirm the plug i.e. 6-15 and now a non GFIC circuit.
Here's how I solved this: I have a Jet 1642: I had given up a few years ago; however, a few months ago tried a newer type GFCI at the suggestion of my son. Hasn’t tripped since. Home Depot: https://www.homedepot.com/p/Leviton...ant-GFCI-Outlet-White-R92-GFWT2-0KW/205997283
It's the same on 1642.....just have nothing Elsa on that line that includes lights or plug ins