Powerful test system is crafted for primary injection testing of protective relay equipment and circuit breakers. It can additionally serve to test the turns ratio of current transformers and for other uses that demand high variable currents. The system comprises a control unit and a current unit. The two parts are portable, And ingvar can be quickly assembled and connected. The control unit has many advanced includes an advanced measuring component for example, That can display turns ratio as well as duration, Electrical potential and current. A second measurement channel can can be utilized for test an additional current or voltage. Current transformer turns ratio, Impedance, Power, Power factor cos and phase angle are calculated and featured in the display. Current and voltage can be presented as percentages of nominal value. The fast, Acting hold function freezes short, Duration readings on the digital display when the voltage or contact signal arrives at the the object, Stop input under test interrupts the current or injection is stopped.