Re: surge protection built into ordinary household electronics

On Fri, 08 Jun 2007 09:53:24 -0700, mpm <mpmillard@xxxxxxx> wrote:

On Jun 8, 3:13?am, Eeyore <rabbitsfriendsandrelati...@xxxxxxxxxxx>
wrote:

A wire-wound fuse would exhibit significant reactance to lightning
frequencies.
But I wouldn't count on this for "protection". :)


I'm still learning surge suppression.

Someday I'll play around on LTSpice to simulate line spike control.
But what level and duration of spike to simulate?
40 000 Vpk for 10mS?
100 000V pk for 1mS?
2000Vpk for 1S

I think it depends an how much PCB space is available and what the
budget is...

One time I gave myself a 1sqin space to fill with line surge
suppression. What can I get?
How much POP energy can a 1 sqin space handle before exploding? (A
good explode to form isolation.)

I just picked a MOV..not perfect but helps..
I think there was many other alternatives.

If lightning strikes the line...Hopefully the strike will be far away
such that the energy level is low enough for the MOV to shunt.

Also
For my region here in BC...
Electrical storms are very rare here (about 1/year)
Power failures are very rare (about 1/year)

I'm more worried about pops from inductive loads..
Air conditioners and AHU's?
12amp power tools?
40 or so light ballasts on the same circuit?
Machinery?

D from BC
.

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