LSIS GIPAM 2000 - Page 54

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- 12 The Curve of Sensiti ve Directi onal Ground Relay (SGR, DGR)
12 The Curve of Sensitive Directional Ground Relay (SGR, DGR)12 The Curve of Sensitive Directional Ground Relay (SGR, DGR)
12 The Curve of Sensitive Directional Ground Relay (SGR, DGR)
a. Relay pick-up range : 318°~ 132°
b. Drop-out after Pick up : 138°~ 312°
RCA : 45°
※ Vo > Vos
Io>los
oo
87)()(78 +≤−≤− RCAIoVoRCA ϕϕ
※ RCA : relay characteristic angle
4. Characteristic Curve
4. Characteristic Curve4. Characteristic Curve
4. Characteristic Curve