ABB RELION REX640 Technical Manual page 1066

Protection functions
the combination of the settings
options for the
angle setting can be used to set the power direction between the reactive and
active power.
Figure 594: Operating characteristics with the Start Value setting, the Power angle
setting being 0 and Directional mode "Forward"
1066
Directional mode setting are "Forward" and "Reverse". The Power
A typical error is, for example, that the VT or CT poles are wrongly
connected. This is seen as a power flow opposite to that of the intended
Pol Reversal setting can be used to correct the situation.
direction. The
By setting the value to "True", the measured apparent power is turned
180 degrees.
Q
Non operating
area
Start value
Directional mode and Power angle . The selectable
Operating
area
P
1MRS759142 F
REX640
Technical Manual