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) |
| Over Current Residual* | 4500 mA |
| *Available in specific meter models. Refer to Features differentiation matrix for PM5500 / PM5600 / PM5700 series for the availability. For over current residual alarms, the maximum setpoint value is limited to 4500 mA independent of the toroid turns setting. | |
| NOTE: For toroid used, the pick-up and drop-out values for over current AL1 I5/I6 and over current AL2 I5/I6 should be set within the range of residual current measurement meeting specified accuracy as mentioned in table Toroid turns setting example. | |