Toshiba GR200 Series Instruction Manual page 1663

Line differential protection ied
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For example, in In=1A , we can have coefficient 3413.333333.
(3) Voltages in three-phase (V L1 , V L2 , V L3 ), in symmetrical component (V1, V2, V0), in earth-
fault (Ve) , and in reference (Vs):
where,
Vn:
For example, in Vn=110V , we can have coefficient 53.74606142.
(4) Active and reactive power (P, Q):
where,
Vn:
In:
CTr:
VTr:
For example, in Vn=110V, In=1A, CTr=2000, VTr=2000, we can have coefficient 2.23942E-6.
(5) Frequency (f):
where,
fr:
For example, in fr=50Hz, we can have coefficient 68.26666667.
Coefficient=
Vn
Secondary phase-phase voltage rating
Coefficient=
Vn
×VTr×In×CTr×2.4
√ 3
Secondary phase-phase voltage rating
Secondary current rating
CT ratio
VT ratio
Coefficient=
System frequency
- 1640 -
4096
×1.2
√ 3
4096
4096
fr×1.2
6F2S1914 (0.49)
GRL200 (Soft 033 & 037)

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