Setting 87LANG=195deg, Restraining angle = 180 to 82.5 deg, Operating angle = 82.5deg to 0deg Accuracy: +/- 3deg . ALPHA RADIUS TEST: SETTING: 87LPP: 0.2 A 87L2P: 0.1A 87LGP: 0.1A 87LR:2 87LANG:195 DEG local and remote current out of phase and equal magnitude. Increase the remote current magnitude by fixing current until the relay trip to find the outer radius Increase the current magnitude by fixing remote current until the relay trip to find the outer radius. ALPHA RADIUS MEASURED AT ALPHA ANGLE =180deg. RADIUS ODPERATION RADIUS OPERATION Diff. element I Remote(A) I Local (A) I Local I Remote Radius Radius(IL/IR) (fixed)A (fixed) A (IL/IR) Operate Operate 87LA 87LB
Setting 87LANG=195deg, Restraining angle = 180 to 82.5 deg, Operating angle = 82.5deg to 0deg Accuracy: +/- 3deg . ALPHA RADIUS TEST: SETTING: 87LPP: 0.2 A 87L2P: 0.1A 87LGP: 0.1A 87LR:2 87LANG:195 DEG local and remote current out of phase and equal magnitude. Increase the remote current magnitude by fixing current until the relay trip to find the outer radius Increase the current magnitude by fixing remote current until the relay trip to find the outer radius. ALPHA RADIUS MEASURED AT ALPHA ANGLE =180deg. Diff. element RADIUS ODPERATION RADIUS OPERATION I Local (fixed)A I Remote(A) Radius(IL/IR) I Remote (fixed) A I Local (A) Radius (IL/IR) Operate Operate 87LA 87LB
sel-411l_-_line_differential.docx