A critical factor in any electrical system is circuit protection. It is essential for safety and security that all protection devices be tested effectively.
Secondary injection testing is normally conducted when the circuit breaker is closed but is not carrying any current through its main poles. Testing is done by connecting the circuit breaker to a test set that can inject and measure the current required in the device relay, causing it to operate.
The Eaton Cutler Hammer 140D481G03 Secondary Injection Test Set is used to test and verify the pickup levels and time delay settings of a breaker’s trip unit. The Eaton Cutler Hammer 140D481G03 is also used to test Amptector, Digitrip, RMS or Optim trip units.
The Eaton Cutler Hammer 140D481G03 passes enough current to check any desired calibration point, allowing the solid-state trip unit operation to be checked without using primary current. The breaker must be de-energized before checking the operation of the solid-state trip units. If the Eaton Cutler Hammer 140D481G03 shows that the solid-state trip unit is not functioning properly, the trip unit should be replaced.