If pros can build equipment without fuses, why should'nt laymen vote ?
If pros can build equipment without fuses, why should'nt laymen vote ?You ask the passengers how to fly the aircraft?
Depends on the pilots. With Weller, not so sure.
I fly only boring ones (having extra low accident ratings). As I told you, I was working in the insurance industry for a long time, so I got a bit risk-averse. moreover, I am a pilot myself (AS350). Old machine design, but very solid. A lot of fuses there
Reply: not too difficult to do with an appliance fitted with a standard 120/240 IEC socket...So how many times has it happened to you?
I was lucky that my flight instructors had all their fuses working. On top of that, I refused to fly with "adventurous" people or people taking shortcuts.
I am still there, some others are not.
if you have made a point somewhere and I didn't respond then either post it againThree times? Kinda rude.
Situation: staging/test facility for systems that might be destined for 240 V countries.
I now refuse to do respond to you.
I can't possible read them all.
Kinda rude of you to expect an answer from me,
... Could someone do an actual experiment to test the assumption that a fuse would help? ...
No. Its *your* turn to prove that Wellers decision was not silly. The audience is waiting ...Thanks for cutting to the chase. It's actually exactly the other way around. The claim is that Weller is doing something incredibly silly or reckless or dangerous. We're get to be presented with any solid evidence for this claim, even though it's reportedly glaringly obvious. Please do so. The audience is waiting. Note that "others do it differently" isn't enough.
You can see primary current skyrockets from 0.25A at 120VAC, the up to 4A at 190VAC. To 240VAC... I did not release the magic smoke. So a fuse would cover long-term primary overvoltage, a thermal fuse as well with that much heat dissipated in the primary it's heating up.
... Could someone do an actual experiment to test the assumption that a fuse would help? ...
Measured a 120VAC transformer to 190VAC with no load. Past 150VAC it gets very loud.
It is an older Hammond (pre-china) 167M25 rated 25.2VAC 3A 75VA, similar in power to the Weller part but a more conservative build. Primary is 4R 0.77H and secondary 0.3R 50mH.
True input power is about 5W 115VAC going to 90W at 190VAC. Effective turns-ratio did not sag as I expected. I got 42VAC out at 190VAC in, I thought it would eventually clip.
You can see primary current skyrockets from 0.25A at 120VAC, the up to 4A at 190VAC. To 240VAC... I did not release the magic smoke. So a fuse would cover long-term primary overvoltage, a thermal fuse as well with that much heat dissipated in the primary it's heating up.
No. Its *your* turn to prove that Wellers decision was not silly. The audience is waiting ...Thanks for cutting to the chase. It's actually exactly the other way around. The claim is that Weller is doing something incredibly silly or reckless or dangerous. We're get to be presented with any solid evidence for this claim, even though it's reportedly glaringly obvious. Please do so. The audience is waiting. Note that "others do it differently" isn't enough.
Measured a 120VAC transformer to 190VAC with no load. Past 150VAC it gets very loud.
You can see primary current skyrockets from 0.25A at 120VAC, the up to 4A at 190VAC. To 240VAC... I did not release the magic smoke. So a fuse would cover long-term primary overvoltage, a thermal fuse as well with that much heat dissipated in the primary it's heating up.
In this case of 240V on a 120V transformer, a primary fuse would blow almost instantly.
No need for "others do it differently. Weller themselves do it differently!
I don't think many are saying it's dangerous as such, it's clearly not as they countless things don't have mains fuses, and the standard (in this case) do not require it.
But it is demonstrably silly - how so? Not only two videos of mine along with 25 pages of responses on what a silly decision it is, and the equally silly public response, but also the fact that most of Weller's other products have a fuse. Most products of Weller's having a safety feature and then a couple of them that deliberately don't is, well, silly. Especially when they refuse to explain why.
This, together with Dave's clear acceptance of culpability in feeding 240V to the unit says to me we DON'T need to continue with any further references to the 240V user error. This is not a fair scenario to dump on Weller.
The question of a fuse should be constrained to the usage of the unit at 110V.. That is a fair scenario to dump on Weller - nothing else.
In this case of 240V on a 120V transformer, a primary fuse would blow almost instantly.
Measured a 120VAC transformer to 190VAC with no load.
Are you intentionally ignoring the obvious? How often does one plugin appliances into the wrong voltage?