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AC source fast short circuit protection device

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semir-t:
Greeting everyone,

I am looking for a fast short circuit protection device for AC sources that I could use when I am powering my custom PCB boards for the first time. I am not keen on using a fuse and would like to use something faster.

I found one device here but I can't seem to buy it: https://mediadesigns.co.in/product/medis-fast-trip/

Here is the video presentation of their device and this is what I am looking for:

I am hoping that someone knows some similar device that can be purchased.

alm:
Chroma and HP/Agilent/Keysight make AC sources that can do this and a lot more. They are big and very expensive new, but you can occasionally find a deal used.

David Hess:
DC short circuit protection can be used for AC by placing it within a bridge rectifier.

A benchtop variable AC power supply should be suitable.  A cheap way to do it would be to get a pair of power transformers sized for your load, and connect them back-to-back; this will just limit the current however.

TheSteve:
This is worth watching:

David Hess:

--- Quote from: TheSteve on February 07, 2024, 04:12:07 pm ---This is worth watching:
--- End quote ---

That brings up the question of how fast he wants it to be.  100s of nanoseconds is possible.  Relays are quite a bit slower.

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