KBAC 27-D vfd running direction, and whining noise

G

GnilknarF

Joined
May 31, 2015
Messages
24
Aloha,

If this has already been asked,I apologize in advance.

I just recently hooked up my new KABC-27D and have 3quick questions on my install.

motor is running in reverse, what wires did I get flipped around?

i am running a 2hp 3ph motor, my input is 115v, question is what jumper setting do I set for the HP, from what I have read you can only go to 1.5 hp with 115v input, do I set the jumper for my 2hp motor or for my 115v input?

the motor/vfd has a high pitch whine when running, is this normal? Or did I mess something else up?

I have the manual and it does not address these specific questions and I have combed the web with no real luck

thank you all in advance,

Gary.
 
You can't run a 2hp motor off of 115V with the KABC-27D. 1.5HP is as large as you can run without going with a 220V input. This might be the cause of your noise and could result in damage.

This is from the bottom of page 14 of the O&M Manual:

*Model KABC-27D is rated 11/2HP Maximum with 115VOlt AC line input and 2 HP maximum with208/230 Volt AC line input.
 
GnilknarF said:
Aloha,

If this has already been asked,I apologize in advance.

I just recently hooked up my new KABC-27D and have 3quick questions on my install.

motor is running in reverse, what wires did I get flipped around?

i am running a 2hp 3ph motor, my input is 115v, question is what jumper setting do I set for the HP, from what I have read you can only go to 1.5 hp with 115v input, do I set the jumper for my 2hp motor or for my 115v input?

the motor/vfd has a high pitch whine when running, is this normal? Or did I mess something else up?

I have the manual and it does not address these specific questions and I have combed the web with no real luck

thank you all in advance,

Gary.
Click to expand...


Set the jumper at 1.5 hp and 115v


Whine is normal


Switch any two wires from the vfd output
 
If the vfd has a setting for carrier frequency you can try playing with it to reduce motor noise. Read the manual for pros/cons of the different values.
Usually there is a trade off between noise and motor heating

ImageUploadedByTapatalk1439169890.239870.jpg


Pablo
 
12345678910 said:
I haven't tried it myself, but Travis W reports that it works.



The load we put on a belt grinder is actually a light load compared to other motor loads.
Click to expand...
Interesting, Travis should know. I stand corrected, although for warranty sake, I think I'll stick to the manufacturers parameters. I'm sorry if I caused any confusion!
 
PEU said:
If the vfd has a setting for carrier frequency you can try playing with it to reduce motor noise. Read the manual for pros/cons of the different values.
Usually there is a trade off between noise and motor heating

View attachment 567951


Pablo
Click to expand...


Thank you Peu, I had read that somewhere else also, I don't see a trim pot for the cf, anything else would just be further shielding I think..... I don't hear it with belt on. It was more obvious with just the motor alone....

Thanks again!
 
On most Vfd this is done via parameters not a trimpot. I don't know this particular model so I can't help...


Pablo
 
I also run a 2hp motor off of a KABC-27D via 120v without any problems. Your hp will max out at 1.5 hp but there shouldn't be any problems. I also have a 6" drive wheel and my grinder is direct drive if that means anything to you. Good luck.
 
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