Fixing A Noisy Contactor ( Very Simple )
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- The contactor was contaminated with rust on the contacts of the magnetic core, and the problem with the extreme shaking and humming of the contactor was dealt with using a bit of sand paper, and elbow grease;DD
That remaining hum is likely mismatch between the fraying surfaces of the coils. I've found that if you see any gaping between the two surfaces when held up to light, you will get noise. I enjoyed your video.
+Charlie Romeo Oh, ok, I'll fix that, but It helps take things down a bit, but I thank you for your reply, Cheers!!!!
Nice. does this work for smaller contactors too?
Yep, it's typically a buildup of rust or grime. Get it as clean as you can and it should work great after.
Yes!!! I was right just needed a bit of a de-rusting!!! Great now it's all working and we got juice
+The HV FReaK Yep;DD
Is this like an commercial unit or something? contactor seems huge! I have a similar problem but it sounds like the contactors are smaller. almost like pen heads vibrating instead of large steel plates lol. anywho on my unit I saw what I think are the contractors that look like AA battery leads with the springy thing on it. They still look pretty new though so I didn't bother them. Also Id like to add my issue is intermittent. sometimes its only the first few seconds of start up. and in defrost mode. sometimes it just comes out of nowhere. any ideas?
This contactor I salvaged from scraps. It was chattering a lot. With most units, yes, it's likely the contactors are smaller, however, they can have the same issue so possibly cleaning them internally would be good if you want the noise to stop, that's all I know for sure. If I could guess what makes the contactors intermittently noisy, I'd guess it would be the result of the position the contactor closes could vary noise, or something could be loose or rattling, but that's what I know from experience.
Any idea why a bit of surface rust would cause such severe chatter? Anyway, thanks for the video.
I'm not sure as it could just be that the cores aren't making full contact causing major vibration, or dirt and rust preventing proper alignment of the cores, that's really all I can think of, but hope this video helps. It certainly helped me and that's why I shared it:)
That did it! Thanks so much for the video. Chattering like a monkey till I cleaned it up.
Great but how did you clean the contacts without damaging them?
I used a fine grit sand paper and gently cleaned each contact.
What if the plates where made of brass ? It would corrode but not as bad as steel.
Steel is a better magnetizer. Plus it's cheaper than brass.
@@VariacManiac oh.
The contractor in my lighting’s is not pulling!! Any idea
Any ideas on why a brand new contactor would chatter?
It might be an under-voltage problem, or somehow dirt got in it during manufacturing. Check if it needs AC or DC, had one that ran on 24VDC. Make sure the spring in it isn't jammed as well.
@@VariacManiac Thanks for getting back. I had 3 contactors paralleld together. The coil was 208 volts. My meter showed the voltage at 210. I went to a different supplier and bought 3 new contactors. They all held without the chattering. I took the other 3 back for a refund. Apparently they were just a bad batch of Square D contactors. I was told I wasn't the only contractor who brought back defective contactors.
@@Redneckboy991 Hmm odd. It might be that the cores are misaligned when their activated, bad coils, etc. I thought square D as a good manufacturer as well. Sometimes, it's just better to get a different brand or a different set. Often these things aren't cheap, glad you got a refund.
Try a cleaner to stop the hum. Automotive throttle body cleaner works fine and leaves no residue. HVAC contactor buzzing, sanding and spraying the contactor bridge points stops the noise.
what current is this beast rated for?
200A @ 480V!!
Variac Maniac shit
Very informative.. unfortunately IEC contactors are difficult to dismantle..this one looks like NEMA
Glad it was!! Yeah there's a lot of different types of contactors. This one was larger than most, but they all work the same way. Some are just set up differently..
@@VariacManiac on the same note..ABB has introduced AF type contactors which basicall has a DC coil and includes an antichatter circuit which as i understand has rectifier and differential amplifier...these contactors are more compact than typical ones
ABB introduced AF type contactors which are more compact and have wider coil voltage range
@@nabeelahmed5115 Very true. Good make they are.
i hope its okay????
+Lost In Space Electronics The contactor is in good working condition now;DD
+Variac Maniac good job then man hope it works for
a long time
Lost In Space Electronics I honestly hope it'll work for a long time too....
+Variac Maniac Lol
Nice :) Thumbs up :)
Alex
Hey, thanks!!!!
Variac Maniac :D :D
That's a giant contactor