ABB Relion 670 series - Low active power and power factor protection LAPPGAPC (37_55)

local criteria functions can also be used as direct tripping protections, normally with a
time delay.
C
B
T
r
i
p
o
u
t
p
u
t
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
n
a
l
o
g
i
n
p
u
t
V3P
I3P
ANSI09000773-1-en.vsd
LocalCheck
CR!
CR2
CR!
CR2
Impedance protection
Breaker Failure
LCCRPTRC (94)
CarrierReceiveLogic
ANSI09000773 V1 EN
Figure 414: Direct transfer trip scheme
13.8.2 Low active power and power factor protection LAPPGAPC
(37_55)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Low active power and power factor
protection
LAPPGAPC - 37_55
1MRK505222-UUS C Section 13
Scheme communication
829
Technical reference manual