Current Transformer Diagram. Therefore the current i 0 lags behind the voltage vector v 1 by an angle ϕ 0 called the no load power factor angle and is shown in the phasor diagram above. Where i s secondary current e s secondary induced emf v s secondary terminal voltage r s secondary winding resistance x s secondary winding reactance i p primary current e p primarily induced emf.
The step up transformer will decrease the output current and the step down transformer will increase the output current for keeping the input and the output power of the system equal. The operation principle of the single phase transformer is. Transformers built to ansi standards usually do not have the vector group shown on their nameplate and instead a vector diagram is given to show the relationship between the primary and other windings.
Based on the windings.
The current produced in its secondary is proportional to the current in its primary conductor it is measured by connecting it with a conventional ammeter. Transformer changes ac voltage from high to low or vice versa. While the physical principles are the same the details of a current transformer compared with a voltage transformer will differ owing to different requirements of the application. Therefore the current i 0 lags behind the voltage vector v 1 by an angle ϕ 0 called the no load power factor angle and is shown in the phasor diagram above.