ABB RER620

1MAC309294-MB F Section 4
Protection functions
RER620 143
Technical Manual
Figure 59: Definition of the relay characteristic angle, RCA=0 degrees in a
compensated network
Example 2.
The “Phase angle” mode is selected, solidly grounded network (φRCA = +60 deg)
=> Characteristic angle = +60 deg
maximum torque line
Characteristic angle = 0 deg
Non-operating area
Min forward angle
Min reverse angle
Min operate
current
Max forward angle
Max reverse angle
I
0
(operating quantity)
-V (polarizing quantity)
zero torque line