ABB RELION REX640 - Page 1066

the combination of the settings Directional mode and Power angle . The selectable
options for the Directional mode setting are "Forward" and "Reverse". The Power
angle setting can be used to set the power direction between the reactive and
active 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
direction. The Pol Reversal setting can be used to correct the situation.
By setting the value to "True", the measured apparent power is turned
180 degrees.
Non operating
area
Operating
area
P
Q
Start value
Figure 594: Operating characteristics with the Start Value setting, the Power angle
setting being 0 and Directional mode "Forward"
Protection functions
1MRS759142 F
1066 REX640
Technical Manual