Title
CCR Warning – Megger Alarm
URL Name
CCR-Warning-Megger-Alarm
Summary
Describes the Megger Alarm warning in the Type L-828 and Type L-829 Ferroresonant Constant Current Regulator and the corrective actions.

Content

Warning Description


The IRMS / Megger alarm threshold has been met. Refer to IRMS / Megger and IRMS / Megger Options for more information about the IRMS / Megger feature. This alarm defaults to 100Kohm. When the CCR determines a warning or setpoint alarm, it will engage the indicator light and the warning will be shown on line 1 of the CCR display. The CCR will continue to operate in the event of a warning. Although the CCR will continue operating, warning conditions must still be noted and fixed. Allowing the CCR to operate in a warning state may cause problems for efficiency, general safety, and longevity of equipment.

Attempt to Correct


Always maintain safe working conditions by using appropriate personal protective equipment (PPE) where necessary.
Verify the CCR megger measurement with a known, calibrated IRMS / Megger unit.
Refer to IRMS / Megger Calibration.
If calibration is correct, consult an electrician to determine faults in the airfield circuit.

Airport Lighting Company | Type L-828, Type L-829 Ferroresonant Constant Current Regulator

Constant Current Regulator