INGVAR

• Most advanced primary current injection test system to simplify all types of switchgear and CT commissioning, ground grid, circuit breaker testing, and more
• Up to 5000 A output current
• Two units, each of about 20 kg (44 lbs), simplifies transportation
• Unique I/30 function allows the current to be pre-set using low current to prevent test sample heating, thus eliminating test result corruption

The INGVAR primary current injection test system is a powerful instrument designed for primary injection testing of protective relay equipment and circuit breakers. It's also used to test the turns ratio of current transformers and for other applications that require high variable currents.

The system consists of 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 features, such as a powerful measurement section that can display turns ratio as well as time, voltage, and current. A second measurement channel can also be used to test an additional current or voltage.

The INGVAR can calculate the current transformer turns ratio, impedance, power, power factor/tan delta (cos φ), and phase angle and the results are shown on the display. The current and voltage can be presented as percentages of nominal value. It also has a fast-acting hold function that freezes short-duration readings on the digital display, so when the voltage or contact signal arrives at the 'stop' input, the object under test interrupts the current, or the injection is stopped.