Hey guys, just beeing reading the transformers section on aac for like the 5th time and am trying to understand, the difference between a CT and a PT.
One question that will help solve this is, when a PT's secondary winding is open circuited, is the magnetising or exciting current small and when the secondary is loaded, is the magnetising current larger?
When a CT's secondary is open circuited, does this inductor impede the flow of the flux through its core so as to drop more voltage across the primary winding and thus stepping this higher voltage to dangerous levels?
It is from this line of thinking that i am guessing that the magnetising current changes with the load on the secondary but i am not sure.
One question that will help solve this is, when a PT's secondary winding is open circuited, is the magnetising or exciting current small and when the secondary is loaded, is the magnetising current larger?
When a CT's secondary is open circuited, does this inductor impede the flow of the flux through its core so as to drop more voltage across the primary winding and thus stepping this higher voltage to dangerous levels?
It is from this line of thinking that i am guessing that the magnetising current changes with the load on the secondary but i am not sure.