Detecting leaking current with a torch - GIF

[gutofabbro]

Hello everyone!

Sorry to disapoint you all. But this test has nothing to do with current ou voltage.
It works to find gas leaking from the cooling system.
Normally they use the Sulfur hexafluoride, that is a great cooling and isolant gas.
These kind of chamber uses this gas to cool down the whole system, in a closed circuit.
As the SF6 is a non-combustible gas the flames will extinguish, if there was a leak in the chamber.
There are some gas detectors to do it, but this old way is cheaper.