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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