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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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9th Jan 2022, 2:38 am | #21 |
Hexode
Join Date: Feb 2007
Location: Chesterfield, Derbyshire, UK.
Posts: 483
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Re: Blown capacitor.
MOV's are bi-directional and are designed to be fitted directly across the mains supply.
The size of breaker in the supply would make no difference to the device failing. What causes an MOV to fail is too high a supply voltage. |
9th Jan 2022, 2:43 am | #22 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
so there were 2 of these mov
1 blew the other was left. if you look at the picture i uploaded you will see the numbers on the mov now on my item it says just 175L20 but others have 175LA20AP and another has 175L20CP |
9th Jan 2022, 2:58 am | #23 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
hey wavesolder
well its a 240 unit and its wired as 240 this is the power / ratings from the manual POWER / RATINGS Amp Rating at 208V 31.3 Amp Rating at 240V 35.6 KW Rating at 208V 6.5 KW Rating at 240V 8.6 |
9th Jan 2022, 3:32 am | #24 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
so the only thing i could think it was the amp breaker.
1 wire from breaker to the device. everything done perfect. it blew the minute i plugged it back in. if it had been plugged and left i dont believe there would have been a problem |
9th Jan 2022, 3:41 am | #25 |
Tetrode
Join Date: Aug 2021
Location: Virginia Beach, Virginia, USA
Posts: 79
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Re: Blown capacitor.
An MOV is typically used for transient suppression, and is a bidirectional (non-polarized) device. You will usually find them on the line side of the power supply. With the amount of lightning strikes you get in Florida it's not surprising to find it blown. Between that and the breaker, it probably saved the rest of the your device.
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9th Jan 2022, 3:47 am | #26 |
Tetrode
Join Date: Aug 2021
Location: Virginia Beach, Virginia, USA
Posts: 79
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Re: Blown capacitor.
The scenario I suspect is that a lightning strike or other large transient shorted the MOV and blew the breaker. After you replaced the breaker, the MOV presented a short across the AC line.
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9th Jan 2022, 4:02 am | #27 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
i just installed 50a wire and breaker 9pm yesterday 75 degree weather clear skies
used 3 hours then unplugged. woke up in the morning to cook breakfast plugged it in and BOOM the minute the plug touched the outlet. all grounds and wires connected perfectly both ends. just boom |
9th Jan 2022, 4:05 am | #28 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
anyway thanks to you guys i will buy 4 of these monday and install.
fingers crossed i hope this fixes it im heart broken. if you guys didnt correct me and tell me this was a MOV i would have never been able to fix this. thanks so much forum fam |
9th Jan 2022, 9:47 am | #29 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,289
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Re: Blown capacitor.
What equipment in the MOV fitted in?
__________________
Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
9th Jan 2022, 4:38 pm | #30 |
Dekatron
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,669
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Re: Blown capacitor.
A MOV, as others have said, is to suppress spikes in voltage, they are often used in digital multimeters. So, if your meter or power supply in your case sees too much voltage on the input, the extra voltage is shunted to ground through the MOV, it "absorbs" the extra power, think of it like a cartoon cat swallowing a stick of dynamite. Instead of getting blown to bits it just inflates with the only damage being a puff of smoke and a surprised look on the cats face.
In your case the MOV has seen too much dynamite, or voltage and has come to bits. Before fitting new ones and just plugging the power supply into the mains, you need to check for other faults further into the circuit or there's a chance you power supply might go BOOM. Hope that doesn't come across as too simplistic or patronising. Andy.
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Curiosity hasn't killed this cat...so far. |
12th Jan 2022, 7:44 pm | #31 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor.
hello everyone
been trying to order this part and nobody seems to be able to tell me what the difference is between a 175LA20AP or a 175LA20CP |
12th Jan 2022, 8:41 pm | #32 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,536
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Re: Blown capacitor.
Quite possibly nothing as far as electrical specs go. It could simply relate to mechanical aspects like lead length or materials used to plate the leads etc.
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12th Jan 2022, 8:46 pm | #33 |
Hexode
Join Date: Feb 2007
Location: Chesterfield, Derbyshire, UK.
Posts: 483
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Re: Blown capacitor.
With a little use of Google and the information is all in these datasheets.
The Littelfuse AP range here:- https://datasheetz.com/data/Over%20V...atasheetz.html and the CP range here:- https://datasheetz.com/data/Over%20V...atasheetz.html |
12th Jan 2022, 8:52 pm | #34 | |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,289
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Re: Blown capacitor.
To quote from the datasheet linked to in post #6.
Quote:
The 'P' following the 'A' or 'B' denotes lead free. I'd still like to know what equipment the MOV is fitted to. There's been a hint that you can cook your breakfast on or in it?
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
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12th Jan 2022, 9:22 pm | #35 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Blown capacitor. Actually an MOV.
CP = C-lll series so far as I can make out.
Lawrence. |
12th Jan 2022, 9:25 pm | #36 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,108
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Re: Blown capacitor. Actually an MOV.
-It's good that all 4 are being replaced, as being subjected to spikes on the mains over the years they age in the process- like a cat using up one of it's lives!
dave |
12th Jan 2022, 9:38 pm | #37 |
Hexode
Join Date: Nov 2009
Location: Cambridge, Cambridgeshire, UK.
Posts: 494
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Re: Blown capacitor.
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12th Jan 2022, 10:52 pm | #38 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor. Actually an MOV.
https://www.appliancepartspros.com/g...ap3191843.html
cooktop https://www.ebay.com/itm/28456507680...AAAOSwSqhhtSG1 this is the power board ASM |
12th Jan 2022, 10:56 pm | #39 |
Banned
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 2,704
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Re: Blown capacitor. Actually an MOV.
For $775 I would expect the whole stove !!!!! My god that is expensive !!!!.
Sorry, just my thoughts. Joe |
12th Jan 2022, 10:59 pm | #40 |
Triode
Join Date: Oct 2020
Location: Lakeland, Florida, USA.
Posts: 35
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Re: Blown capacitor. Actually an MOV.
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