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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> Help with size of fuse for mobility scooter https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1517154844 Message started by juco on Jan 28^th, 2018, 3:54pm

Title: Help with size of fuse for mobility scooter
Post by juco on Jan 28^th, 2018, 3:54pm

Father-In-Law has lost the fuse and fuse holder for his charger for his mobility scooter. (Roma Lyon)

I am trying to purchase both for him but unsure of fuse size, mobility companies not replying.

Charger is Input 115/230v AC, 60/50Hz 3/1.5A
Output: 24V DC/ 5A
Batteries are: 2 x 12V 34AH (in series 24V)

Can anyone give me an idea as to what size of fuse (Amps) would be required for the charger output.

Title: Re: Help with size of fuse for mobility scooter
Post by Natedog on Jan 28^th, 2018, 7:13pm

If the output is meant to be 5A then chances are it will be a little more than that for the fuse. Probably either 7.5 or 10 at a guess, but that is only a guess

Title: Re: Help with size of fuse for mobility scooter
Post by juco on Jan 28^th, 2018, 7:32pm

Thanks Natedog, that makes sense to me as a layman (dont understand this elec stuff)
I did find another label on the side which states:
"Fuse 10A 125V"

So the 10A would stack up but where does the 125V kick in for the fuse as input is 230/240V AC and output is 24V DC, is it some sort of over-protection? Or maybe a standard size fuse?

Title: Re: Help with size of fuse for mobility scooter
Post by CWatters on Jan 29^th, 2018, 7:01pm

A fuse rated 125V can be used on lower voltages (eg 12, 24, 48V) but not the other way around.

Perhaps contact..

http://romamedical.co.uk/product-category/mobility-scooters/mid-size-scooters/

Title: Re: Help with size of fuse for mobility scooter
Post by juco on Jan 29^th, 2018, 10:28pm

CWatters, thanks for your explanation.

I have emailed several companies including Roma but responses have been poor.

Title: Re: Help with size of fuse for mobility scooter
Post by Lectrician on Jan 30^th, 2018, 6:59am

Photo?

Is it an automotive type fuse?

There must be a hole where it goes?

Title: Re: Help with size of fuse for mobility scooter
Post by juco on Jan 31^st, 2018, 11:39am

Sorry about delay in replying but I am not getting email notifications.
Not sure what type of fuse, see image.

[gallery fullsize]juco/1517398748.jpg[/gallery]

Title: Re: Help with size of fuse for mobility scooter
Post by Lectrician on Jan 31^st, 2018, 5:17pm

It's probably easier to get a whole new fuse carrier from Maplin, CPC or RS. You would need to solder it in though. As said, a 10amp slow blow fuse is probably best, as long as the voltage rating is higher than 24v.

Title: Re: Help with size of fuse for mobility scooter
Post by juco on Jan 31^st, 2018, 6:13pm

I will order from ebay, soldering should be ok.

Title: Re: Help with size of fuse for mobility scooter
Post by londonman on Feb 1^st, 2018, 9:28am

Lectrician wrote on Jan 31^st, 2018, 5:17pm:

..... as long as the voltage rating is higher than 24v.

Never been aware of voltage ratings on a fuse before but a quick Google explains all.

Title: Re: Help with size of fuse for mobility scooter
Post by CWatters on Feb 2^nd, 2018, 6:41am

I notice one picture says "bypass fuse". I strongly recommend you don't do that.

As recommended above a new holder from Maplin is only a few £.

Title: Re: Help with size of fuse for mobility scooter
Post by Lectrician on Feb 2^nd, 2018, 7:30am

I wonder if the fuse blew for a reason? Perhaps the charger has had it ::)