[Boatanchors] AC Meter Shunt Help

[Brian Goldsmith]

-----Original Message-----
From: Ed


I do want it to read the original 75 amps and I will try to 
construct or find what you suggest.


****** Most current transformers use the torroidal method of
construction,the necessary core would most probably available from normal
suppliers.


 One further question, wouldn't 15:1 come 
into this equation since full scale presently says (in the small print) 5 
amps and the full scale reading of the meter is 75 amps?

******  15:1 is the ratio of the current transformer.Your meter has marked
on its scale,the meters FSD (full scale deflection) figure of 5 Amps.
Multiply the 5 Amp figure by the ratio and you get 75:5. In other words,if
you pass 75 Amps through the primary of the current transformer,you will get
5 Amps from the secondary to which the meter is connected,the meter thus
reads full scale which now represents 75 Amps.

Brian Goldsmith.