ABB Relion 670 series, Technical Reference Manual

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Table 69: LDLPDIF (87L) Output signals
Name Type Description
TRIP BOOLEAN General trip from differential protection system
TR_A BOOLEAN Trip signal from phase A
TR_B BOOLEAN Trip signal from phase B
TR_C BOOLEAN Trip signal from phase C
TRLOCAL BOOLEAN Trip from local differential function
TRLOC_A BOOLEAN Trip from local differential function in phase A
TRLOC_B BOOLEAN Trip from local differential function in phase B
TRLOC_C BOOLEAN Trip from local differential function in phase C
TRREMOTE BOOLEAN Trip from remote differential function
DIFLBLKD BOOLEAN Local line differential function blocked
5.1.5 Setting parameters
Table 70: L3CPDIF (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
ChargCurEnable Disabled
Enabled
- - Disabled Off/On selection for compensation of
charging currents
AddDelay Disabled
Enabled
- - Disabled Off/On selection for delayed diff. trip command
IMaxAddDelay 0.20 - 5.00 IB 0.01 1.00 Below limit, extra delay can be applied,
multiple of IBase
tDefTime 0.000 - 6.000 s 0.001 0.000 Definite time additional delay in seconds
tMinInv 0.001 - 6.000 s 0.001 0.010 Inverse Delay Minimum Time. In seconds
Table continues on next page
Section 5
1MRK505222-UUS C
Differential protection
150
Technical reference manual