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Name
Type
Default
Description
BLKNSUNR
BOOLEAN
0
Block of trip for unrestrained negative sequence
differential protection
BLKNSSEN
BOOLEAN
0
Block of trip for sensitive negative sequence differential
protection
DESENSIT
BOOLEAN
0
Raise pick up: function temporarily desensitized
Table 45:
GENPDIF (87G) Output signals
Name
Type
Description
TRIP
BOOLEAN
General, common trip signal
TRIPRES
BOOLEAN
Trip signal from restrained differential protection
TRIPUNRE
BOOLEAN
Trip signal from unrestrained differential protection
TRNSUNR
BOOLEAN
Trip signal from unrestrained negative sequence
differential protection
TRNSSENS
BOOLEAN
Trip signal from sensitive negative sequence differential
protection
PICKUP
BOOLEAN
Common pickup signal from any phase
BLKH
BOOLEAN
Common harmonic block signal
OPENCT
BOOLEAN
An open CT was detected
OPENCTAL
BOOLEAN
Open CT Alarm output signal. Issued after a delay ...
IDMAG_A
REAL
Fund. freq. differential current, phase A; in primary A
IDMAG_B
REAL
Fund. freq. differential current, phase B; in primary A
IDMAG_C
REAL
Fund. freq. differential current, phase C; in primary A
IDMAG_NS
REAL
Negative Sequence Differential current; in primary
Amperes
IBIAS
REAL
Magnitude of the common Bias current; in primary
Amperes
6.4.5
Settings
Table 46:
GENPDIF (87G) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disable / Enable
IdMin
0.10 - 1.00
IB
0.01
0.25
Section 1 sensitivity, multiple of generator
rated current
IdUnre
1.00 - 50.00
IB
0.01
10.00
Unrestr. prot. limit, multiple of generator rated
current
OpNegSeqDiff
No
Yes
-
-
Yes
Negative Sequence Differential Enable Off/On
IMinNegSeq
0.02 - 0.40
IB
0.01
0.10
Neg. sequence curr. limit, as multiple of gen.
rated curr.
Section 6
1MRK 502 048-UUS A
Differential protection
134
Technical manual
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