Electronics > Beginners

Brymen BM235 10A fuse silently destroyed by a switched off UPS leakage current..

<< < (10/12) > >>

hgg:
So it looks like that all this shows the safety of a good multimeter.

I bought 2 of the ebay fuses but I am 99% sure they are fake.
I just want to open them and compare them with the original.
The original costs a Chinese multimeter..   :)

Electro Detective:

Test them to failure (SAFELY) and take notes,

then open them up and see how well the fuse housings and materials fared.

If 'BS' spec 10 amp fake cheapie fuses blow at 8 amps instead of 10 amps reasonably fast, at a fraction of the cost,
they are cheap and sort of do the job for the price, and a better deal than no fuse (or galvanised fencing nail  :palm: ) hey what do you want?  :D

If they are labelled 10 amps and blow at 12 or 15 amps, or your meter smokes first,  :-\
don't waste your cash..and meter   :phew:

 

rsjsouza:

--- Quote from: hgg on March 07, 2019, 03:55:19 pm ---So it looks like that all this shows the safety of a good multimeter.

--- End quote ---
I think that is the most interesting conclusion of all this. Lots of folks argue how idiotic or exaggerated our claims are for meter safety around this forum, but this scenario is a perfect example of how even a CAT I system can be quite powerful when doing a simple measurement.

Would an el-cheapo meter or a fake HRC fuse kill you in the same scenario? Probably not, but it would give you a scare at a minimum and (big maybe) injure you if the case couldn't contain the energy.

Regarding arc flash on regular outlets, I have had my share of very impressive events on both the typical 15A circuit and some higher ones (40, 80A).

malagas_on_fire:
I had one cheapo meter exploded while probing mains in Volts a long time ago, which gave a good jump scare  (PS this are the older remains stored in garage so there might be some spider webs) : :

[Edit here they are details :P Don't blame the spiders it happened well before they nest ...]

https://www.eevblog.com/forum/testgear/new-aneng-q1-9999-counts/?action=dlattach;attach=458422

https://www.eevblog.com/forum/testgear/new-aneng-q1-9999-counts/?action=dlattach;attach=458389

https://www.eevblog.com/forum/testgear/new-aneng-q1-9999-counts/?action=dlattach;attach=458395

hgg:
-  "Regarding arc flash on regular outlets, I have had my share of very impressive events on both the typical 15A circuit and some higher ones (40, 80A)."

Do you mind sharing the details?   :)


-  "Test them to failure (SAFELY) and take notes,
then open them up and see how well the fuse housings and materials fared."

Will do.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod