Maximum allowable setpoint
The meter is programmed to help prevent user data entry
errors, with set limits for the standard alarms.
The maximum setpoint value you can enter for some of the standard alarms depends on the voltage transformer ratio (VT ratio), current transformer ratio (CT ratio), system type (i.e., number of phases) and/or the maximum voltage and maximum current limits programmed at the factory.
NOTE: VT ratio is the VT primary
divided by the VT secondary and CT ratio is the CT primary divided
by the CT secondary.
| Standard alarm | Maximum setpoint value |
|---|---|
| Over Phase Current | (maximum current) x (CT ratio) |
| Under Phase Current | (maximum current) x (CT ratio) |
| Over Neutral Current | (maximum current) x (CT ratio) x (number of phases) |
| Over Ground Current | (maximum current) x (CT ratio) |
| Over Voltage L-L | (maximum voltage) x (VT ratio) |
| Under Voltage L-L | (maximum voltage) x (VT ratio) |
| Over Voltage L-N | (maximum voltage) x (VT ratio) |
| Under Voltage L-N | (maximum voltage) x (VT ratio) |
| Over Active Power | (maximum voltage) x (maximum current) x (number of phases) |
| Over Reactive Power | (maximum voltage) x (maximum current) x (number of phases) |
| Over Apparent Power | (maximum voltage) x (maximum current) x (number of phases) |
| Over Present Active Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Last Active Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Predicted Active Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Present Reactive Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Last Reactive Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Predicted Reactive Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Present Apparent Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Last Apparent Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Predicted Apparent Power Demand | (maximum voltage) x (maximum current) x (number of phases) |
| Over Voltage Unbalance | (maximum voltage) x (VT ratio) |
| Phase Loss | (maximum voltage) x (VT ratio) |