C
B
T
rip
o
u
tp
ut
Low impedance protection
Sudden change in current
variation
Zero sequence overcurrent
protection
Negative sequence overcurrent
protection
Zero sequence overvoltage
protection
Negative sequence overvoltage
protection
Compensated over and
undervoltage protection
Three phase undercurrent
Three phase overcurrent
Backup trip of breaker failure
protection
OR
Low active power and power
factor protection
A
na
lo
g
in
pu
t
U3P
I3P
IEC09000773-1-en.vsd
LocalCheck
CR1
CR2
CR1
CR2
Impedance protection
Breaker Failure
LCCRPTRC
CarrierReceiveLogic
IEC09000773 V1 EN-US
Figure 388: DTT scheme
15.8.2
Setting guidelines
GUID-9E9CD5E0-1556-4E56-8A5D-5ACC17DAA00F v2
Setting guidelines for Direct transfer trip functions are outlined in the following sections.
15.8.3
Low active power and power factor protection LAPPGAPC
GUID-585236C8-583C-4415-9820-A1DD038EA995 v1
15.8.3.1
Identification
GUID-6F3FADD8-8974-4874-8A43-642C1D540D3E v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Low active power and power factor
protection
LAPPGAPC
-
37_55
Section 15
1MRK 505 343-UEN B
Scheme communication
622
Application manual
Summary of Contents for Relion 670 series
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