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Z
L
Z
T
Zsource 2/3
Zsource 1
en05000444.vsd
IEC05000444 V1 EN-US
Figure 63: System impedances
where:
Line data is
15.0
L
L
Z
X
»
=
W
EQUATION1419 V1 EN-US
Transformer data is
2
220
10 220
% 10%
24.2
100 200
T
X
X
=
Þ
=
×
=
W
EQUATION1420 V1 EN-US
Source impedance is
1
7.0
Source
Z
=
W
EQUATION1421 V1 EN-US
2
Source2 / 3
Source2 / 3 220
220
Z
5
(Z
)
5 49.4
70
= W Þ
=
× =
W
æ
ö
ç
÷
è
ø
EQUATION1422 V1 EN-US
Table 14: General settings
Setting
IED 1
IED 2
Remarks
Operation
On
On
Operation Mode: On
(active)
NoOfTerminals
3
3
Number of current sources,
ends of the circuit
IBase (Global base)
600 A
600 A
Reference current of the
protection in the primary
(system) Amperes (Remark
1)
IBase is set in the Global
base values function
(GBASVAL).
TransfAonInpCh
2
1
Input currents on these
input channels will be
referred to the high voltage
side (Remark 2)
TraAWind1Volt
220 kV
220 kV
Transformer A, Y-side
voltage in kV
TraAWind2Volt
70 kV
70 kV
Transformer A, d-side
voltage in kV
ClockNumTransA
1
1
LV d-side lags Y-side by 30
degrees
TransfBonInpCh
3
2
Input currents on these
input channels will be
referred to the high voltage
side (Remark 2)
TraBWind1Volt
220 kV
220 kV
Transformer B, Y-side
voltage in kV
Table continues on next page
Section 6
1MRK 505 343-UEN B
Differential protection
134
Application manual
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