KBAC-24D outlet problems

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backskipper

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Nov 27, 2013
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I'm using a KBAC-24D on 120V AC. It worked at my old place, but there seems to be an electrical problem in the house I just moved into that trips the overvoltage protection instanly. I have unplugged everything in the breaker box including neutrals except one circuit and tried the VFD on every outlet in the house and it trips everywhere in the house. I tried it on a power inverter and it worked fine there... Everything in the house seems to be working fine as well, but I'm sure the VFD is more sensitive to problems. Any pointers in finding the problem?
 
If you are plugged into a GFCI receptical it's not gonna work. GFCI breakers and recepticals are designed to trip if a imbalance is detected. VFD stands for variable frequency drive.
 
Eric Kidwell said:
If you are plugged into a GFCI receptical it's not gonna work. GFCI breakers and recepticals are designed to trip if a imbalance is detected. VFD stands for variable frequency drive.
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It's not on a gfci. Something weird i noticed is that if i turn on a bunch of appliances and get the voltage down to 119 or so it stops tripping and runs fine.
 
Use a volt meter to check the voltage in the new house. If the voltage is to high call your electric company.
 
woodwrkr221 said:
Use a volt meter to check the voltage in the new house. If the voltage is to high call your electric company.
Click to expand...

The house is at 123v. The guy i talked to from kb i think said you are good to something like 130v and that i must have an electrical problem.
 
backskipper said:
I'm using a KBAC-24D on 120V AC. It worked at my old place, but there seems to be an electrical problem in the house I just moved into that trips the overvoltage protection instanly. I have unplugged everything in the breaker box including neutrals except one circuit and tried the VFD on every outlet in the house and it trips everywhere in the house. I tried it on a power inverter and it worked fine there... Everything in the house seems to be working fine as well, but I'm sure the VFD is more sensitive to problems. Any pointers in finding the problem?
Click to expand...

What do you mean by "overvoltage protection"

What device are you reffering to?
The breakers, or something else?


If the outlet is not a GFI, but has one in the cicrut, it will trip too.
 
Check for continuity between neutral and ground. or better yet, grab one of theos $5 outlet testers. images (1).jpg some times I put away all the fancy test rigs and pull one out of my kit. Its saved my bacon more than once.
 
I would disconnect and reconnect all wiring. You might have jostled a connection loose in the move. That might be a gfi protected circuit meaning anything downstream from the gfi outlet is protected. These drives are not to be run on a gfi circuit.

Wire it up for 240v and move on. :)
 
Silly as it sounds, are you SURE the power wiring is correctly connected to the power supply. There could even be a wiring fault in the whole house.

Check that the wires from the VFD go to the right wires on the plug blades. For a light bulb it won't matter which wire is on which screw .... on a VFD it will.

Next, check that the house wiring isn't wrong. As before, everything may work fine with a wiring fault, but sensitive electronics will know if wires are reversed. A simple voltage tester or fault tester can check for this.

Same goes for the wiring to the motor from the VFD, make sure all are on the right places.


As said, double check that the VFD is set up properly. It is pretty easy to set a parameter wrong and think it is right.

If you think the power to the house is not right, have the power company or a good electrician check it out. Stranger things have happened than an electrical worker hooking something up wrong. Some of the guys who work on crews don't even speak or read English, and have little or no experience at all in wiring. ( not a pejorative comment, just a real fact)

The house having something wired wrong, either internally or from the pole, is not likely, but worth checking out.
 
I brought the grinder to someone's house and it works there. I'm guessing there is a wiring fault that is going to be fun to find.
 
I'm not trying to be a worry-wart here, but if you even suspect there is a wiring fault in the house, FIND OUT WHAT THE PROBLEM IS RIGHT AWAY.
These can be simple things or things that can kill you.


Before you get real worked up, make absolutely sure that there aren't GFI circuits somewhere in the house. At ours, the one in the downstairs bath shuts off the upstairs bathrooms and bedroom, the one in the kitchen shuts off the dining room, and the one in the garage shuts off the back deck.

An electrician friend may be a good call to make.
 
lets try this again, You need to know where to start. go buy an outlet tester, like thisimages (1).jpg they are cheap, plug it into the offending outlet. what error does it show? Next can you see the offending outlet from the fuse box? if not plug the tester into an extension cord thats plugged into the offending outlet. This is a quick and dirty way to isolate a good portion of the house wiring. turn off and leave off one circuit breaker at a time, (leaving on the one to the offending outlet.) If you are lucky, its a PFTG and when you hit the right breaker the tester will show green. Now you know what what part of the house to concentrate on.
 
If you suspect a wiring fault, please like has been suggested and track it down. Shut the circuit off for now until you find it. Be safe.
 
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