Name Type Description
IDL3 REAL Instantaneous differential current, phase L3
IDL1MAG REAL Magnitude of fund. freq. differential current,
phase L1
IDL2MAG REAL Magnitude of fund. freq. differential current,
phase L2
IDL3MAG REAL Magnitude of fund. freq. differential current,
phase L3
IBIAS REAL Magnitude of the bias current, common for L1,
L2, L3
IDNSMAG REAL Magnitude of the negative sequence differential
current
PID-3560-INPUTSIGNALS v6
Table 34: LDLPSCH Input signals
Name Type Default Description
CTFAIL BOOLEAN 0 CT failure indication from local CT supervision
OUTSERV BOOLEAN 0 Input for indicating that the terminal is out of
service
BLOCK BOOLEAN 0 Block of function
PID-3560-OUTPUTSIGNALS v7
Table 35: LDLPSCH Output signals
Name
Type Description
TRIP BOOLEAN General trip from differential protection system
TRL1 BOOLEAN Trip signal from phase L1
TRL2 BOOLEAN Trip signal from phase L2
TRL3 BOOLEAN Trip signal from phase L3
TRLOCAL BOOLEAN Trip from local differential function
TRLOCL1 BOOLEAN Trip from local differential function in phase L1
TRLOCL2 BOOLEAN Trip from local differential function in phase L2
TRLOCL3 BOOLEAN Trip from local differential function in phase L3
TRREMOTE BOOLEAN Trip from remote differential function
DIFLBLKD BOOLEAN Local line differential function blocked
1MRK 505 394-UEN A Section 6
Differential protection
Line differential protection RED650 2.2 IEC 89
Technical manual
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