Function description IEC 61850 identification Function description IEC 61850 identification
Current reversal and
weakend infeed logic
for residual overcurrent
protection
ECRWPSCH Fuse failure supervision SDDRFUF
Four step residual
overcurrent protection
EF4PTOC Sensitive Directional
residual over current
and power protetcion
SDEPSDE
Instantaneous residual
overcurrent protection
EFPIOC Synchrocheck,
energizing check, and
synchronizing
SESRSYN
Phase selection,
quadrilateral
characteristic with fixed
angle
FDPSPDIS Stub protection STBPTOC
Faulty phase
identification with load
enchroachment
FMPSPDIS Additional security logic
for differential protection
STSGGIO
Phase selection,
quadrilateral
characteristic with
settable angle
FRPSPDIS Transformer differential
protection, two winding
T2WPDIF
Directional Overpower
protection
GOPPDOP Transformer differential
protection, three winding
T3WPDIF
Directional Underpower
protection
GUPPDUP Automatic voltage
control for tapchanger,
single control
TR1ATCC
1Ph High impedance
differential protection
HZPDIF Automatic voltage
control for tapchanger,
parallel control
TR8ATCC
Line differential
protection, 3 CT sets,
23 line ends
L3CPDIF Thermal overload
protection, two time
constants
TRPTTR
Line differential
protection, 6 CT sets,
35 line ends
L6CPDIF Two step undervoltage
protection
UV2PTUV
Low active power and
power factor protection
LAPPGAPC Voltage differential
protection
VDCPTOV
Negative sequence
overcurrent protection
LCNSPTOC Current reversal and
weak-end infeed logic
for phase segregated
communication
ZC1WPSCH
Negative sequence
overvoltage protection
LCNSPTOV Local acceleration logic ZCLCPLAL
Three phase overcurrent LCP3PTOC Current reversal and
weak-end infeed logic
for distance protection
ZCRWPSCH
Three phase
undercurrent
LCP3PTUC Automatic switch onto
fault logic, voltage and
current based
ZCVPSOF
Table continues on next page
Section 4 1MRK504116-UUS C
Station communication
822
Application manual