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MDP Digital Overcurrent Relay
The feature to bear in mind when working with the MDP tabular wizard is:
• On the Setup screen, you must enter a value into the CT Ratio box. This value is multiplied by the values in
the amp registers to convert the latter into user units. If you do not enter a value for the CT Ratio, the
message “CT Ratio has not been entered” appears on the bottom of the Tabular Data Screen and on the
Large Faceplate wizard.
Monitoring Tab
The MDP Monitoring Screen shows the following:
• Metering values of RMS Current, RMS Trip Current and Phase Trip Status
• Trip Time
• Status
• External Inputs
The message “CT Ratios has not been entered!” will appear when no CT Ratio entered on the Setup tab. Click on Setup
Screen Tab to enter the CT Ratio.