Video

Just to clarify no special cabling necessary on input side? Thus the comment drive as close to motor as possible.

Very instructive. Thank you for posting.

Can I reform several capacitors together by connecting multiple capacitors in parallel?

Great Information Thanks.

i heard that reforming capacitors require more time than just seconds to reform them, especially large values. form CHATGPT: Reforming electrolytic capacitors can take time, especially for larger capacitors or those that have been unused for an extended period. It's recommended to allow several hours or even days for the reforming process to complete, depending on the capacitor's condition.

What is vintage capacitors?

Thank you Al. You are more important to us than you will ever know.

Super video😊

Should be XLPE (Cross Linked Polyethylene)?

I retired from a large campus that had over 500 VFD'S. Never wasted money on shielded cable on there 480 volt output side of any drives. Used plain Jane THWN copper wire for every 6 & 18 pulse drives. Most motors were plain Jane NEMA motors & the rest high efficiency motors. Had some 40 year old motors that were on drives. Even had two 4,160 volt 1,750 HP chiller motors on drives with regular medium voltage cable. Most drives were less then 40' from motors.

I think the building will turn out GREAT!!

Great!

nice information

IGBT checking, replacement video.

Love the video. You said XPLE instead of XLPE. Please keep uploading these they're fantastic!

Excellent video except you kept saying XPLE instead of XLPE towards the end of the video. Thanks for the explanation fantastic information

this is a brilliant presentation, thank you. The only thing I would add is that conductors need to be SIZED TO PASS THE PEAK CURRENT density, not the average value. This helps transfer the dV/dT spikes into the motor without dissipating energy in the serial impedance of an undersized sized cable. (ppl talk about reflecting or bouncing waves when energy can't go through!) This is is true with any Pulsed Modulation: "pass the peak not the average"! 🤞

Very informative! Subscribed.

Was he even speaking English? #iamdumb

Very good information

Volunteer fire Department

RIDICULOUS. I'VE REPLACED 10'S OF THOUSANDS OF CAPACITORS IN HIGH VOLTAGE TUBE GEAR AND NEVER HAD A NEW CAP EXPLODE...UNLESS ITS WIRED BACKWARDS BY ACCIDENT. THE ONLY TIME I "REFORM" A CAP IS BRINGING UP A LONG DORMANT DEVICE SLOWLY ON A VARIAC. BUT THATS FOR DIAGNOSIS. THE OLD CAPS GET REPLACED ANYWAY.

Thank you for the information, boss

Hello ! Your video is very helpful ! I am an engineer working in a cement factory in Albania. We have 4 simovert masterdrives running from 2006 and i am very interested to make a general maintenance and control procedures as you mentioned by your specialists. We have 3 identical drives of 800 kw and one of 500 kW. Could you please help me by giving the right contact person so i can start a communication with him.

I made an automatic reformer unit using 2 timers 4 relays and a 600VDC power supply. It will start at 200V and then switch to 400VDC after 2 hours and finally switches to 600VDC after another 2 hours.

very informative, but one question - doesn't the motor act as as smoothing inductor (reactor) and smooth out the square wave at least somewhat in the entire circuit?

Great information, but I note Belden does not recommend the use of 360 degree shield terminating cable glands. With a shieled terminating gland, significant shield currents can be released, for example at enclosure ingress, exposing sensitive equipment to noise currents that would be contained if an isolating cable gland such as a Crouse CGB, ADE or CMP TC or A2 Gland. Pete C

Slide says LGBT instead of IGBT at 0:48

Geee, build the vfd power pack on the motor back-end or very close to the motor, then no more long cables... sorry belden...:) or go back to the one common line shaft or adjustable gearbox

what would i start with to learn about this general area? something more specific than "electrical engineering"

Thanks Al for that info. I'm aware of slowly bringing new capacitors up to operating voltage and hence current flow. I just replaced my electrolytic filter capacitors with exact uF and 20V additional power specs. in my transistor stereo power amp. What is a good voltage and time interval increase for forming my new caps with the amp plugged into my AC variable voltage power supply? Also, as the caps form and charge up, I'm guessing I will begin to hear a white noise signal coming through the speakers (increasingly). Is this correct? Thanks so much. PH

Very good information and explanation. Thank you.

Thank you Al, Excellent introduction to cables. Best Wishes, Aaron

Try to get a copy of MepcoElectra apnote on lyric cap You will get better picture.

Good informative video

Wow that souds to me like cheap Chinese caps!

This is great! Passed it on to my colleagues.

THANKS . PLEASE MAKE A DEMONSTRATION OF ACTUAL FORMING CAPACITOR IN VFD ,