Figure 153: Load Blinder Boundary Conditions; Power Swing Blocking Logic - GE MiCOM P40 Agile Technical Manual

Single breaker current differential (with distance)

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Chapter 10 - Power Swing Functions

Figure 153: Load Blinder Boundary Conditions

The area is defined by lines created with angles fixed at 10° closer to the resistive axis than those created by the

load blinder angle setting (Load/B Angle - 10°) and a circular arc with a radius concentric with, and equivalent

to 20% greater than, the load blinder impedance setting (Z< Blinder Imp + 20%).

This is clearly indicated with reference to the diagram.

This power swing conditions are completely independent of the slow swing associated with Zone 7 and Zone 8.

The Power Swing function follows the logic diagram below:

Blind Region

Operate Region

Load blinder boundary

Power Swing region

(shaded area)

Blind Region

P54x1i-TM-EN-1

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