On 2022-09-07, at 23:10, Sven Schnelle <svens@...> wrote:
I'm started to exchange these filters immediately before even connecting
devices to power. I'm often buying TE in the US, and what happend
several times now is that i thought "lets connect it for a short time
and see whether it works¡±.
If I need to do such a check, I run the device from a 110 V source (*).
Smaller chance of blowing up, and 1/4 the energy if it does.
Interesting discussion, but we are not much further along pinning down any manufacturing date from which on Schaffner filters can be considered reasonably safe. Somewhere in the 1990s, apparently...
Gr¨¹?e, Carsten
(*) A Variac will do; but I can¡¯t really imagine a lab without some 110 V devices, so I usually have a dedicated autotransformer around (which just needs to be connected the right way to phase/neutral).
