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Will this capacitor work?
Hi guys, the motor run capacitor for my rolling shutters tubular motor died. The cap case size is 35mm x 78mm and this is critical because it must fit inside the motor enclosure. I've looked at hundreds of 20 µF capacitors and they all were at least 40mm diameter (too wide). Then I found a capacitor that is 25mm x 56.5mm. This is tiny and I'm thinking it must be too good to be true. Can you help me decide if this capacitor will run this motor? The printing on the original capacitor is: Arcotronic – (purchased by KEMET) Part Number C.87.7ZF2 MKP 20 µF +/-5% b 320 V~ HPF N 560-8/A1 (In the USA voltage is 120 volts) (out of production for years, none available) And the data sheet for the prospective new little one: https://www.farnell.com/datasheets/2755239.pdf -- Dallas |
Will this capacitor work?
On Sat, 4 May 2019 15:03:27 -0000 (UTC), "Dallas"
wrote: Hi guys, the motor run capacitor for my rolling shutters tubular motor died. The cap case size is 35mm x 78mm and this is critical because it must fit inside the motor enclosure. I've looked at hundreds of 20 µF capacitors and they all were at least 40mm diameter (too wide). Then I found a capacitor that is 25mm x 56.5mm. This is tiny and I'm thinking it must be too good to be true. Can you help me decide if this capacitor will run this motor? The printing on the original capacitor is: Arcotronic – (purchased by KEMET) Part Number C.87.7ZF2 MKP 20 µF +/-5% b 320 V~ HPF N 560-8/A1 (In the USA voltage is 120 volts) (out of production for years, none available) And the data sheet for the prospective new little one: https://www.farnell.com/datasheets/2755239.pdf It looks ok, with one possible problem. The capacitor should be non-polarized. https://en.wikipedia.org/wiki/Motor_capacitor Start capacitors above 20 µF are always non-polarized aluminium electrolytic capacitors [4] with non solid electrolyte and therefore they are only applicable for the short motor starting time. I dunno about the "non solid electrolyte" since the capacitor in question is a "solid" polypropylene metallized film dielectric. Oh well. I can't tell from the Farnell data sheet whether it's an NP cap. So, I found the original C87 series data sheet at: https://content.kemet.com/datasheets/KEM_F3063_C87.pdf It doesn't specifically say non-polarized, but the lack of polarity markings and an "AC" voltage rating, indicates that it's probably NP. Yes, it should work. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Will this capacitor work?
On 5/4/2019 1:17 PM, Jeff Liebermann wrote:
On Sat, 4 May 2019 15:03:27 -0000 (UTC), "Dallas" wrote: Hi guys, the motor run capacitor for my rolling shutters tubular motor died. The cap case size is 35mm x 78mm and this is critical because it must fit inside the motor enclosure. I've looked at hundreds of 20 µF capacitors and they all were at least 40mm diameter (too wide). Then I found a capacitor that is 25mm x 56.5mm. This is tiny and I'm thinking it must be too good to be true. Can you help me decide if this capacitor will run this motor? The printing on the original capacitor is: Arcotronic €“ (purchased by KEMET) Part Number C.87.7ZF2 MKP 20 µF +/-5% b 320 V~ HPF N 560-8/A1 (In the USA voltage is 120 volts) (out of production for years, none available) And the data sheet for the prospective new little one: https://www.farnell.com/datasheets/2755239.pdf It looks ok, with one possible problem. The capacitor should be non-polarized. https://en.wikipedia.org/wiki/Motor_capacitor Start capacitors above 20 µF are always non-polarized aluminium electrolytic capacitors [4] with non solid electrolyte and therefore they are only applicable for the short motor starting time. I dunno about the "non solid electrolyte" since the capacitor in question is a "solid" polypropylene metallized film dielectric. Oh well. I can't tell from the Farnell data sheet whether it's an NP cap. So, I found the original C87 series data sheet at: https://content.kemet.com/datasheets/KEM_F3063_C87.pdf It doesn't specifically say non-polarized, but the lack of polarity markings and an "AC" voltage rating, indicates that it's probably NP. Yes, it should work. I'd like to pass some of your help ethic on to Phil. But I'm afraid it would take a massive dose, and end up harming your superpower! Luv you Jeff, Mikek :-) |
Will this capacitor work?
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Will this capacitor work?
Dallas wrote:
Yeah... I love this group. It's been years since I've been here and I'm super happy that it's still going and not wrecked by trolls. Thanks guys! -- Dallas |
Will this capacitor work?
On 2019/05/04 8:03 a.m., Dallas wrote:
Hi guys, the motor run capacitor for my rolling shutters tubular motor died. The cap case size is 35mm x 78mm and this is critical because it must fit inside the motor enclosure. I've looked at hundreds of 20 µF capacitors and they all were at least 40mm diameter (too wide). Then I found a capacitor that is 25mm x 56.5mm. This is tiny and I'm thinking it must be too good to be true. Can you help me decide if this capacitor will run this motor? The printing on the original capacitor is: Arcotronic €“ (purchased by KEMET) Part Number C.87.7ZF2 MKP 20 µF +/-5% b 320 V~ HPF N 560-8/A1 (In the USA voltage is 120 volts) (out of production for years, none available) And the data sheet for the prospective new little one: https://www.farnell.com/datasheets/2755239.pdf Do you have any photos of your rollup door? I'm wondering if it is the same make as my old 1970s vintage door on my midway rifle gallery game. I've put a few pictures of my door motor he https://www.dropbox.com/sh/o74oeoers...thIOVXXia?dl=0 John :-#)# |
Will this capacitor work?
On Sat, 4 May 2019 16:54:36 -0400, Ralph Mowery
wrote: In article , says... It looks ok, with one possible problem. The capacitor should be non-polarized. https://en.wikipedia.org/wiki/Motor_capacitor Start capacitors above 20 µF are always non-polarized aluminium electrolytic capacitors [4] with non solid electrolyte and therefore they are only applicable for the short motor starting time. I dunno about the "non solid electrolyte" since the capacitor in question is a "solid" polypropylene metallized film dielectric. Oh well The capacitor in question was listed as a motor RUN capacitor,not start. The top of the data sheet says RUN so the non-polarized electrolyte part should not be in question. Oops. I stand corrected. I wasn't paying attention to the differences between start and run capacitors. Run vs. Starting Capacitor http://www.capacitorformotor.com/starting_capacitor.html http://www.capacitorindustries.com/wp-content/uploads/Run-and-Start-Capacitors.pdf In any case, the data sheet is the correct one for a run capacitor: https://content.kemet.com/datasheets/KEM_F3063_C87.pdf -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Will this capacitor work?
John Robertson wrote:
AAB7Z8tLqrGbltXAthIOVXXia Yup, nearly identical. Same gears for the limit switches. (pain in the ass :- ) -- Dallas |
Will this capacitor work?
John Robertson wrote:
AAB7Z8tLqrGbltXAthIOVXXia -- Dallas |
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