Zero sequence overcurrent protection LCZSPTOC
GUID-F0C38DA1-2F39-46DE-AFFE-F919E6CF4A57 v2
Zero sequence components are present in all abnormal
conditions involving earth. They have a considerably
high value during earth faults.
Three phase overcurrent LCP3PTOC
GUID-AC4FF35E-5D86-421E-82C7-93F600E9F453 v2
Three phase overcurrent (LCP3PTOC) is designed for
overcurrent conditions.
Features:
• Phase wise start and trip signals
• Overcurrent protection
• Phase wise RMS current is available as service values
• Single definite time stage trip function.
Three phase undercurrent LCP3PTUC
GUID-E8EA5CE8-ED7A-4FA3-9DAC-83227D53387F v3
Three phase undercurrent function (LCP3PTUC) is
designed for detecting loss of load conditions.
Features:
• Phase wise start and trip signals
• Phase wise RMS current is available as service values
• Single definite time stage trip function
15. Logic
Tripping logic SMPPTRC
M12275-3 v15
A function block for protection tripping and general
start indication is always provided as a basic function
for each circuit breaker. It provides a settable pulse
prolongation time to ensure a trip pulse of sufficient
length, as well as all functionality necessary for correct
co-operation with autoreclosing functions.
The trip function block includes a settable latch function
for the trip signal and circuit breaker lockout.
The trip function can collect start and directional signals
from different application functions. The aggregated
start and directional signals are mapped to the IEC
61850 logical node data model.
General start matrix block SMAGAPC
GUID-BA516165-96DE-4CD9-979B-29457C7653C0 v3
The Start Matrix (SMAGAPC) merges start and
directional output signals from different application
functions and creates a common start and directional
output signal (
STDIR
) to be connected to the Trip
function.
The purpose of this functionality is to provide general
start and directional information for the IEC 61850 trip
logic data model SMPPTRC.
Trip matrix logic TMAGAPC
M15321-3 v14
The trip matrix logic (TMAGAPC) function is used to
route trip signals and other logical output signals to
different output contacts on the IED.
The trip matrix logic function has 3 output signals and
these outputs can be connected to physical tripping
outputs according to the specific application needs for
settable pulse or steady output.
Group alarm logic function ALMCALH
GUID-16E60E27-F7A8-416D-8648-8174AAC49BB5 v4
The group alarm logic function (ALMCALH) is used to
route several alarm signals to a common indication, LED
and/or contact, in the IED.
Group warning logic function WRNCALH
GUID-F7D9A012-3AD4-4D86-BE97-DF2A99BE5383 v4
The group warning logic function (WRNCALH) is used to
route several warning signals to a common indication,
LED and/or contact, in the IED.
Group indication logic function INDCALH
GUID-D8D1A4EE-A87F-46C6-8529-277FC1ADA9B0 v4
The group indication logic function (INDCALH) is used to
route several indication signals to a common indication,
LED and/or contact, in the IED.
Basic configurable logic blocks
M11396-4 v19
The basic configurable logic blocks do not propagate
the time stamp and quality of signals (have no suffix QT
at the end of their function name). A number of logic
blocks and timers are always available as basic for the
user to adapt the configuration to the specific
application needs. The list below shows a summary of
the function blocks and their features.
These logic blocks are also available as part of an
extension logic package.
• AND function block. The AND function is used to form
general combinatory expressions with boolean
variables. The AND function block has up to four
inputs and two outputs. One of the outputs is
inverted.
• GATE function block is used for whether or not a
signal should be able to pass from the input to the
output.
• INVERTER function block that inverts the input signal
to the output.
• LLD function block. Loop delay used to delay the
output signal one execution cycle.
• OR function block. The OR function is used to form
general combinatory expressions with boolean
variables. The OR function block has up to six inputs
and two outputs. One of the outputs is inverted.
Line differential protection RED670
1MRK 505 379-BEN N
48 Hitachi Power Grids
© Copyright 2017 Hitachi Power Grids. All rights reserved
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