Toshiba GR200 Series - Page 125

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 102 -
θ
Offset directional element
Quad element in reverse
Z
B
o
R
X
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):
  

(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)