I have a Air Compressor motor that I need to get new capacitors for right away.
The motor is a Brook TEFC 3 HP Single Phase 60 HZ 115V/230V, 34 amps at 115V, 17 Amps at 230V, 1725 RPM. It only has Two starting capacitors in parallel and no running capacitors. I added an image of the pair of capacitors from the motor.
I can't find any good info on it or really any good info on similar type motors to compare and make a good choice.
I've been looking online for answers but I am not finding much but bits and pieces of info.
So here is where I am at, I have the motor running on 240V two pole with one ground on a 60 amp breaker it's a 115/230v type motor, the caps in it where Two 590-708 MFD or uF 110 volts 109mm Tall and 52.5mm in diameter.
I was doing testing on my compressor before I put it back into service after a complete restoration job on the tank, motor and air pump, while testing and setting the pressure switch the caps vented a bit the next day after another test and I noticed the smell of electrolyte, then motor having trouble getting to speed and engaging the centrifuge switch. It was fine before but those caps are very old and not the right voltage so no wonder they went.
So I've soured some new caps these CB60 800-960 MFD/uF 220-250V Caps 111.12 mm tall and 46.02 mm diameter , I was told 500 MFD/uF per HP under high starting load like an air compressor.
I need to put two of them in parallel to get about 1500 MFD/uF. I was also told I needed to use a 1.5X volt rated cap compared to the line voltage so 165V for 110V and 330V for 220V.
I've also found these CD60 450V 500MFD/uF Caps 100 mm Tall And 50 mm diameter, so I am wonder what I should go with.
If anyone has some input I'd really appreciate it before I make a decision, I am leaning to the CB60 800-960 MFD/uF 220-250V since they are the closest to the caps I have in size and type without being 330V, Everything in 330V I found is ether low MFD/uF, super pricey or only on Alibaba and I can't order form them the shipping alone would be 250+ USD for a few caps.
These's two are the best I could find that are affordable, fit my size requirements and are available.
https://www.aliexpress.com/item/590...pm=a2g0s.13010208.99999999.265.e32a3c00fAwa1U
https://www.aliexpress.com/item/AC-...pm=a2g0s.13010208.99999999.259.114c3c00klsTie
The motor is a Brook TEFC 3 HP Single Phase 60 HZ 115V/230V, 34 amps at 115V, 17 Amps at 230V, 1725 RPM. It only has Two starting capacitors in parallel and no running capacitors. I added an image of the pair of capacitors from the motor.
I can't find any good info on it or really any good info on similar type motors to compare and make a good choice.
I've been looking online for answers but I am not finding much but bits and pieces of info.
So here is where I am at, I have the motor running on 240V two pole with one ground on a 60 amp breaker it's a 115/230v type motor, the caps in it where Two 590-708 MFD or uF 110 volts 109mm Tall and 52.5mm in diameter.
I was doing testing on my compressor before I put it back into service after a complete restoration job on the tank, motor and air pump, while testing and setting the pressure switch the caps vented a bit the next day after another test and I noticed the smell of electrolyte, then motor having trouble getting to speed and engaging the centrifuge switch. It was fine before but those caps are very old and not the right voltage so no wonder they went.
So I've soured some new caps these CB60 800-960 MFD/uF 220-250V Caps 111.12 mm tall and 46.02 mm diameter , I was told 500 MFD/uF per HP under high starting load like an air compressor.
I need to put two of them in parallel to get about 1500 MFD/uF. I was also told I needed to use a 1.5X volt rated cap compared to the line voltage so 165V for 110V and 330V for 220V.
I've also found these CD60 450V 500MFD/uF Caps 100 mm Tall And 50 mm diameter, so I am wonder what I should go with.
If anyone has some input I'd really appreciate it before I make a decision, I am leaning to the CB60 800-960 MFD/uF 220-250V since they are the closest to the caps I have in size and type without being 330V, Everything in 330V I found is ether low MFD/uF, super pricey or only on Alibaba and I can't order form them the shipping alone would be 250+ USD for a few caps.
These's two are the best I could find that are affordable, fit my size requirements and are available.
https://www.aliexpress.com/item/590...pm=a2g0s.13010208.99999999.265.e32a3c00fAwa1U
https://www.aliexpress.com/item/AC-...pm=a2g0s.13010208.99999999.259.114c3c00klsTie
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