Settings - ABB Relion Technical Manual

Section 6
Differential protection
6.4.5
Table 46: GENPDIF (87G) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
IdMin 0.10 - 1.00
IdUnre 1.00 - 50.00
OpNegSeqDiff No
Yes
IMinNegSeq 0.02 - 0.40
134
Name Type
BLKNSUNR BOOLEAN
BLKNSSEN BOOLEAN
DESENSIT BOOLEAN
Table 45: GENPDIF (87G) Output signals
Name Type
TRIP BOOLEAN
TRIPRES BOOLEAN
TRIPUNRE BOOLEAN
TRNSUNR BOOLEAN
TRNSSENS BOOLEAN
PICKUP BOOLEAN
BLKH BOOLEAN
OPENCT BOOLEAN
OPENCTAL BOOLEAN
IDMAG_A REAL
IDMAG_B REAL
IDMAG_C REAL
IDMAG_NS REAL
IBIAS REAL

Settings

Unit Step
- -
IB 0.01
IB 0.01
- -
IB 0.01
Default Description
0 Block of trip for unrestrained negative sequence
differential protection
0 Block of trip for sensitive negative sequence differential
protection
0 Raise pick up: function temporarily desensitized
Description
General, common trip signal
Trip signal from restrained differential protection
Trip signal from unrestrained differential protection
Trip signal from unrestrained negative sequence
differential protection
Trip signal from sensitive negative sequence differential
protection
Common pickup signal from any phase
Common harmonic block signal
An open CT was detected
Open CT Alarm output signal. Issued after a delay ...
Fund. freq. differential current, phase A; in primary A
Fund. freq. differential current, phase B; in primary A
Fund. freq. differential current, phase C; in primary A
Negative Sequence Differential current; in primary
Amperes
Magnitude of the common Bias current; in primary
Amperes
Default Description
Disabled Operation Disable / Enable
0.25 Section 1 sensitivity, multiple of generator
rated current
10.00 Unrestr. prot. limit, multiple of generator rated
current
Yes Negative Sequence Differential Enable Off/On
0.10 Neg. sequence curr. limit, as multiple of gen.
rated curr.
1MRK 502 048-UUS A
Technical manual