ABB 615 Series - Page 340

Min reverse angle
Min trip current
Max forward angle
Max reverse angle
Forward tripping zone
Backward tripping zone
Characteristic angle
= +60 deg
Min forward angle
maximum torque line
zero torque line
-VG

(polarizing
quantity)
IG
(tripping quantity)
GUID-7F29880D-18AB-4B4C-9953-6D186760D35A V1 EN
Figure 153: Definition of the relay characteristic angle, RCA=+60 degrees in a solidly
grounded network
Example 3
The "Phase angle" mode is selected, isolated network (φRCA = -90 deg)
=> Characteristic angle = -90 deg
Section 4 1MAC059074-MB A
Protection functions
334 615 series ANSI
Technical Manual