Hitachi 670 Series Application Manual page 40

Section 4
Analog and binary signal transfer for line differential protection
Table 1:
Setting
Operation
NoOfTerminals
IBase (Global base)
TransfAonInpCh
TraAWind1Volt
TraAWind2Volt
ClockNumTransA
TransfBonInpCh
TraBWind1Volt
TraBWind2Volt
ClockNumTransB
ZerSeqCurSubtr
Table 2:
Setting
ChargCurEnable
IdMin
EndSection1
EndSection2
SlopeSection2
SlopeSection3
IdMinHigh
Table continues on next page
34
General settings
IED 1
On
3
600 A
2
220 kV
70 kV
1
3
220 kV
70 kV
1
On
Setting group N
IED 1
Off
0.35 · IBase
1.25 · IBase
3.00 · IBase
40%
80%
2.00 · IBase
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IED 2 Description
On Operation Mode (active)
3 Number of current sources/
circuit ends
600 A Reference current of the
protection in the primary
system (note 1)
IBase is set in the Global
base values function
(GBASVAL).
1 Input currents on the input
channels are referred to the
high voltage side (note 2)
220 kV Transformer A: Y-side voltage
70 kV Transformer A: d-side voltage
1 LV d-side lags Y-side by 30
degrees
2 Input currents on the input
channels are referred to the
high voltage side (note 2)
220 kV Transformer B: Y-side voltage
70 kV Transformer B: d-side voltage
1 LV d-side lags Y-side by 30
degrees
On Zero-sequence currents are
subtracted from differential
and bias currents (note 3)
IED 2
Off
0.35 · IBase
1.25 · IBase
3.00 · IBase
40%
80%
2.00 · IBase
Communication set-up, 670/650 series
1MRK505382-UEN Rev. K
Description
Charging current not
eliminated (default)
Sensitivity in Section 1
of the operate-restrain
characteristic
End of section 1 of the
operate-restrain
characteristic
End of section 2 of the
operate-restrain
characteristic
Slope of the operate-
restrain characteristic in
Section 2
Slope of the operate-
restrain characteristic in
Section 3
Temporarily decreased
sensitivity used when
the protected circuit is
connected to a power
source (note 4)
Application Guide