ABB Relion 670 series - Page 158

Name Values (Range) Unit Step Default Description
OpenCTEnable Disabled
Enabled
- - Enabled Open CTEnable Off/On
tOCTAlarmDelay 0.100 - 10.000 s 0.001 1.000 Open CT: time in s to alarm after an open CT
is detected
tOCTResetDelay 0.100 - 10.000 s 0.001 0.250 Reset delay in s. After delay, diff. function is
activated
Table 72: L3CPDIF (87L) Non group settings (basic)
Name Values (Range) Unit Step Default Description
NoOfTerminals 2
3
- - 2 Number of current terminals of the protected
circuit
Chan2IsLocal No
Yes
- - No 2-nd local current connected to input channel
2, Yes/ No
IBase 50.0 - 9999.9 A 0.1 3000.0 Base (reference) current of the differential
protection
Table 73: L6CPDIF (87L) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IdMin 0.20 - 2.00 IB 0.01 0.30 Oper - restr charact., section 1 sensitivity,
multiple IBase
IdMinHigh 0.20 - 10.00 IB 0.01 0.80 Initial lower sensitivity, as multiple of IBase
tIdMinHigh 0.000 - 60.000 s 0.001 1.000 Time interval of initial lower sensitivity, in sec
IdUnre 1.00 - 50.00 IB 0.01 10.00 Unrestrained differential current limit, multiple
of IBase
NegSeqDiffEn Disabled
Enabled
- - Enabled Off/On selection for internal / external fault
discriminator
NegSeqROA 30.0 - 120.0 Deg 1.0 60.0 Internal/external fault discriminator Operate
Angle, degrees
IMinNegSeq 0.01 - 0.20 IB 0.01 0.04 Min. value of neg. seq. curr. as multiple of
IBase
CrossBlockEn No
Yes
- - No Off/On selection of the cross -block logic
I2/I1Ratio 5.0 - 100.0 % 1.0 10.0 Max. ratio of second harmonic to fundamental
harm dif. curr. in %
I5/I1Ratio 5.0 - 100.0 % 1.0 25.0 Max. ratio of fifth harmonic to fundamental
harm dif. curr. in %
ChargCurEnable Disabled
Enabled
- - Disabled Off/On selection for compensation of
charging currents
AddDelay Disabled
Enabled
- - Disabled Off/On selection for delayed diff. trip command
Table continues on next page
Section 5 1MRK505222-UUS C
Differential protection
152
Technical reference manual