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ABB REL 352 Instruction Manual page 39

Numerical phase comparison transmission line protection system

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I.L. 40-201.9
Z P :
Forward Reach Setting
Z GR :
Reverse Reach Setting
ϒ:
Maximum Torque Angle
B:
Balance Point
3-18
X
Z P
ϒ
Z GR
Figure 3-11. Mho Characteristics for Three-Phase Fault Detection
Power Automation and Protection Division
B
R
Sub 5
ESK00043
REL 352 Version 1.00

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