Re: what size shunt do I need?
- From: Larry <noone@xxxxxxxx>
- Date: Mon, 14 Aug 2006 15:32:09 -0400
chuck <nospam@xxxxxxxxxx> wrote in news:1155571450_32141
@sp6iad.superfeed.net:
You may have to
make your own.
The 100A shunt can be filed down between the meter contacts to increase its
resistance so it will output 50mv at 75 amps, even calibrated for this
particular old meter movement. All you need is a 100A calibrated current
source and a rat tailed file...(c; Been there, cal'd that. I calibrated
one for a circuit breaker tester a long time ago. It was 50,000A at 50mv!
It was used as the sensing shunt for a huge circuit breaker tester that
failed calibration. I fixed it. You have just GOTTA see a 50,000A circuit
breaker trip in milliseconds when that huge tester pulses it! It sounds
like a bomb going off!....(c; The bus bars to the breaker jump right off
the floor! Must be magnetic pull against the Earth's field...(c;
Some things a cal lab tech gets to do are lots more fun than others....(c;
--
There's amazing intelligence in the Universe.
You can tell because none of them ever called Earth.
.
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