Parameter: Export Power/Lag VAr
•
Default Setting: +ve/+ve
With both Export Power (W) and Lag VAr (VAr) set to be +ve, the direction of energy transfer will
follow the IEC convention e.g. an induction motor consumes Watts and VArs, this is shown in Figure 3-4
as positive Watts and positive VArs.
[dw_7SR5_EnergyDirectionConvention, 1, en_US]
Figure 3-4
Energy Direction Convention
Setting either the Export Power (W) or Lag VAr (VAr) to be -ve, will reverse the direction of the
energy transfer for these quantities. So forward VAr will then be reported as Imported Reactive
Energy, and forward Watts will be reported as Exported Active Energy. See also Power Protec-
tion (32) and Power Factor (55) function elements.
Device Functionality
3.2 Device Configuration
Reyrolle 7SR5, Transformer Protection Device, Device Manual 49
C53000-G7040-C015-1, Edition 11.2019
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