Skip to content

Power and Energy

Power and Energy is a tab for setting the power and energy monitored by energy meters with pulse output or measuring current and voltage from sensors connected to the analog inputs INPA1 - INPA6.

Power and energy

Page elements

  1. Section with readings and configuration of power and energy measurement. Since version HW 3.5+ SW 1.49d there are 6, previously there were 4.

    Includes:

    • name setting
    • power and energy readings

    • changing the unit of measurement (added in HW 3.5+ SW 1.22c)

      Impact of the unit of measure option on the power value

      Selecting this option may affect the displayed power value and, therefore, the energy count. The effect varies depending on the selected measurement inputs (I and U):

      • I = INPAX and U = INPAX or constant voltage: the power value is returned in kW for each option, except:
        • W, for which the value is increased by a factor of 1000 (conversion from kW to W).
      • I = INPDX and U inactive: the power value is returned in kW for each option.
      • I = mX and U inactive: the power value is identical to the value under the mX variable for each option, except:
        • kW -> W - results in a 1000-fold increase (conversion from kW to W),
        • W -> kW - results in a 1000-fold decrease (conversion from W to kW).

    • selection of measuring inputs

    • setting the pulse-to-unit conversion factor
    • field for entering a new state of energy measurement
    • enabling energy counting (added in HW 3.5+ SW 1.49d)

  2. Function of storing readings - when selected, LK periodically saves energy values ​​and restores them after a restart.

Setting the energy value

The energy reading in the field will only change when the Count energy option is turned on. Therefore, before setting a new state of energy, it is worth activating this option beforehand. Otherwise, the set value will appear in the readout field only after activating Count energy.

Measurement with counter with pulse output

To the logic input INPD1 - INPD4 connect + (plus) the pulse output of the meter, to GND - (minus) from the counter. Then in the drop-down menu select the input INPD1 - INPD4 to which the counter is connected, and in the field below enter the number of pulses for 1 kWh.

Measurement with analogue current and voltage sensors

From the left menu, select the INPA input to which the current sensor is connected, and in the right menu select the voltage input (sensor). In the case of measuring AC current with the SCT transconductors can be used to select the approximate voltage value in the electrical network.