ABB RET670 Applications Manual page 127

1MRK504116-UUS C
Name Values (Range)
IdUnre 1.00 - 50.00
CrossBlockEn Disabled
Enabled
NegSeqDiffEn Disabled
Enabled
IMinNegSeq 0.02 - 0.20
NegSeqROA 30.0 - 120.0
Table 37: T2WPDIF (87T) Group settings (advanced)
Name Values (Range)
EndSection1 0.20 - 1.50
EndSection2 1.00 - 10.00
SlopeSection2 10.0 - 50.0
SlopeSection3 30.0 - 100.0
I2/I1Ratio 5.0 - 100.0
I5/I1Ratio 5.0 - 100.0
OpenCTEnable Disabled
Enabled
tOCTAlarmDelay 0.100 - 10.000
tOCTResetDelay 0.100 - 10.000
tOCTUnrstDelay 0.10 - 6000.00
Table 38: T2WPDIF (87T) Non group settings (basic)
Name Values (Range)
RatedVoltageW1 0.05 - 2000.00
RatedVoltageW2 0.05 - 2000.00
RatedCurrentW1 1 - 99999
RatedCurrentW2 1 - 99999
Table continues on next page
Application manual
Unit Step Default
IB 0.01 10.00
- - Enabled
- - Enabled
IB 0.01 0.04
Deg 0.1 60.0
Unit Step Default
IB 0.01 1.25
IB 0.01 3.00
% 0.1 40.0
% 0.1 80.0
% 0.1 15.0
% 0.1 25.0
- - Disabled
s 0.001 3.000
s 0.001 0.250
s 0.01 10.00
Unit Step Default
kV 0.05 400.00
kV 0.05 231.00
A 1 577
A 1 1000
IED application
Description
Unrestrained protection limit, multiple of
Winding 1 rated current
Operation Off/On for cross-block logic
between phases
Operation Off/On for neg. seq. differential
protections
Negative sequence current must be higher
than this level to be used
Operate Angle for internal / external negative
sequence fault discriminator
Description
End of section 1, multiple of Winding 1 rated
current
End of section 2, multiple of Winding 1 rated
current
Slope in section 2 of operate-restrain
characteristic, in %
Slope in section 3 of operate-restrain
characteristic, in %
Max. ratio of second harmonic to fundamental
harm dif. curr. in %
Max. ratio of fifth harmonic to fundamental
harm dif. curr. in %
Open CT detection feature. Open CTEnable
Off/On
Open CT: time in s to alarm after an open CT
is detected
Reset delay in s. After delay, diff. function is
activated
Unrestrained diff. protection blocked after this
delay, in s
Description
Rated voltage of transformer winding 1 (HV
winding) in kV
Rated voltage of transformer winding 2 in kV
Rated current of transformer winding 1 (HV
winding) in A
Rated current of transformer winding 2 in A
Section 3
121