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Name
Type
Default
Description
BLOCK
BOOLEAN
0=False
Block signal for activating the blocking mode
BLOCK_LS
BOOLEAN
0=False
Signal for blocking the stab. stage
ENA_MULT_HS
BOOLEAN
0=False
Enables the high stage multiplier
Table 425:
87L Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip
PICKUP
BOOLEAN
Pickup
STR_LS_LOC
BOOLEAN
Pickup stabilized stage local
STR_LS_REM
BOOLEAN
Pickup stabilized stage remote
OPR_LS_LOC
BOOLEAN
Trip stabilized stage local
OPR_LS_REM
BOOLEAN
Trip stabilized stage remote
OPR_HS_LOC
BOOLEAN
Trip instantaneous stage local
OPR_HS_REM
BOOLEAN
Trip instantaneous stage remote
BLKD2H_LOC
BOOLEAN
Restraint due 2nd harmonics detected local
BLKD2H_REM
BOOLEAN
Restraint due 2nd harmonics detected remote
PRO_ACTIVE
BOOLEAN
Status of the protection, true when function is operative
4.3.1.8
Settings
Table 426:
87L Group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Low trip value
10...200
%Ir
1
10
Basic setting for the stabilized stage pickup
High trip value
200...4000
%Ir
1
2000
Instantaneous stage trip value
Pickup value 2.H
10...50
%
1
20
The ratio of the 2. harmonic component to
fundamental component required for blocking
High Op value Mult
0.5...1.0
0.1
1.0
Multiplier for scaling the high stage trip value
Time multiplier
0.05...15.00
0.01
1.00
Time multiplier in IDMT curves
End section 1
0...200
%Ir
1
100
Turn-point between the first and the second
line of the operating characteristics
Slope section 2
10...50
%
1
50
Slope of the second line of the operating
characteristics
End section 2
200...2000
%Ir
1
500
Turn-point between the second and the third
line of the operating characteristics
Table continues on next page
Section 4
1MAC059074-MB A
Protection functions
496
615 series ANSI
Technical Manual
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