ABB RELION 670 Series Technical Manual page 119

1MRK 502 066-UUS B
Name Values (Range)
NegSeqDiffEn Disabled
Enabled
IMinNegSeq 0.02 - 0.20
NegSeqROA 30.0 - 120.0
Table 50: 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 51: T2WPDIF (87T) Non group settings (basic)
Name Values (Range)
GlobalBaseSelW1 1 - 12
GlobalBaseSelW2 1 - 12
ConnectTypeW1 WYE (Y)
Delta (D)
ConnectTypeW2 WYE (Y)
Delta (D)
Table continues on next page
Technical manual
Unit Step Default
- - 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
- 1 1
- 1 1
- - WYE (Y)
- - WYE (Y)
Differential protection
Description
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
Global base selector for winding 1
Global base selector for winding 2
Connection type of winding 1: Y-wye or D-
delta
Connection type of winding 2: Y-wye or D-
delta
Section 6
113