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Primary Current Injection Test System from Megger

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article image ODEN A Primary Current Injection Test System

Megger  offers a powerful test system designed for primary injection testing of protective relay equipment and circuit breakers.  

The ODEN A primary current injection test system is also used to test the transformation ratio of current transformers and for other applications that require high variable currents. Up to 8 kA can be generated with these test systems.  

The ODEN A system consists of a control unit together with one or two current units. All parts are portable and ODEN A can be quickly assembled and connected.  

There are two versions of the current unit: S and X; S and X are identical in all respects except that X has an additional 30/60 V output.  


Oden A primary current injection test system can be used in a number of applications where high current is required:

  • Primary current injection testing of protective systems
  • Breaker testing
  • Testing current transformers
  • Heat runs: joints, circuit breakers and disconnectors
  • Testing of safety-ground devices
  • Testing integrity of ground grids

One way to test the integrity of ground grids is by injecting current between a reference ground and the ground to be tested, and measuring the voltage drop and the percentage of current flowing through the ground grid.  

The type X current unit included with ODEN A is designed for this type of application.

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