Toshiba GR200 Series Instruction Manual page 125

Offset directional element
Figure 2.10-10 Offset element in Quad characteristic for close-in fault
The element of the offset directional characteristic is obtained using Equation (2.10-31):
where,
X = reactance component of measured impedance
R = resistance component of measured impedance
θ = directional angle setting (= directional element angle setting in (2.10-28))
Z B = offset reach setting (fixed to be 1.5Ω in 5A rating and 7.5Ω in 1A rating)
X
Z B
o
Quad element in reverse
X + R tan �� ≤ ��
��
- 102 -
6F2S1914 (0.49)
θ
R
(2.10-31)
GRL200 (Soft 033 & 037)