Internal current transformer in series with one end

Uses the output string into the current transformer wires inside an electrical equipment other end  mcb circuit breaker  circuit breakers, input connecting an ammeter in s1 s2 ammeter connected to the other end. Generated when electrical work on the ammeter current  Electric energy meter  spread through pointer display current. But at this current must be multiplied by the number of current transformer ratio is the actual value of the current work is the electrical current.