Products > Test Equipment

Measuring 100A DC current

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tooki:

--- Quote from: johansen on June 08, 2024, 07:50:27 pm ---6$ on amazon - 100 1/2 watt resistors.
https://www.amazon.com/EDGELEC-Resistor-Tolerance-Multiple-Resistance/dp/B07XLBY5RF

--- End quote ---
I truly don’t get it: why would anyone order electronic components on Amazon? Aside from it being a scummy company, it’s not even a good price! For the same price, you can get name-brand resistors from Digikey for example.

Martin72:
You're not seriously thinking about using umpteen resistors in parallel here.....

mzzj:

--- Quote from: Martin72 on June 06, 2024, 10:03:40 pm ---But that is precisely the problem.
Finding a current clamp that is that accurate.
If you're lucky, you'll find one with 1%, which is already very accurate for a current clamp, but costs much more than a current shunt, which is even more accurate.

--- End quote ---
Finding <1% accurate current clamps is not difficult, it is just that finding accurate AND cheap wont happen.  ;D

Hioki CT6846A 1000A current clamp is 0.2% accurate but about 3000 usd/eur  :P

Martin72:
That's clear...
There is one more question, which is:
How exactly does it have to be and why?

BillyO:
Yeah, we know practically nothing about the use case.

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