Re: bleeder resistor power supply

Derek,

I understand and respect what you are saying. Regards to discharge
time. It depends on what you are after. If you don't want a big
suprise the next morning or next week when you hook up a supposedly
discharged supply, 3 minutes works for me.

If you need to have a discharged supply sooner than that you may want
to decrease the size of the resistor.

The operating equation here is T = R times C, where T is seconds, C
is Farads and R is Ohms. That is one time constant. That means in the
first time constant voltage has fallen to 37% of the initial value.
After the second time constant it would be at 12%, after the third,
it would be at 5%. The general agreement is after 3 time constants
things are discharged.

You said you have been shocked numerous times. You are still alive,
aren't you? It's not as dangerous as it has been made out to be.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "HighTech" <hightechsystems@h...> wrote:
> Mariss
> What do you recommend for a time constant discharge resistor?
> I am going to have to stand by my comment about 60v being fatal in
> certain conditions and yes one of them is being wet. The reason you
were not
> electrocuted is in your text you never went over 200ma and were
probably
> dry. Its the current that kills you not the voltage that is why
people who
> have been struck by lightning, with a million volts, don't die. I
have been
> shocked by all kinds of voltages when I worked as an electrician.
Read this
> for more explanation http://pchem.scs.uiuc.edu/pchemlab/electric.htm
> Derek