Metering - ABB Relion 670 Series Product Manual

Busbar protection REB670
Version 2.2
to the fundamental signal amplitude which indicates the
voltage signal quality factor.
Additionally, the function is used to calculate the numerical
multiple of rated frequency harmonics amplitude and
harmonic distortion upto the 9
know the predominant harmonic frequencies order and their
amplitudes present in the system. The function also
calculates the crest factor to indicate the effectiveness of
the signal. All calculations in the harmonic monitoring
function are based on IEEE 1459 and IEEE 519-2014
standards.
The voltage harmonic function monitors the harmonic
distortion value constantly. Whenever these value crosses
their set limit levels, a warning signal will be initiated. If the
warning signal persists continuously for the set time, an
alarm signal will be generated.
Fault current and voltage monitoring FLTMMXU
The fault current and voltage monitoring function monitors
and reports the voltage and current values on occurrence of
a trip event.
FLTMMXU function monitors and reports the following
values:
• Maximum peak current of individual phases during the trip
event
• Maximum RMS current of individual phases during the trip
event
• Maximum RMS current of all phases during the trip event
• Fundamental DFT current magnitude and angle of
individual phases at the instant of triggering the function
via input TRIGFLUI
• Fundamental DFT neutral current magnitude and angle at
the instant of triggering the function via input TRIGFLUI
• Fundamental DFT voltage magnitude and angle of
individual phases at the instant of triggering the function
via input TRIGFLUI
• Fundamental DFT neutral voltage magnitude and angle at
the instant of triggering the function via input TRIGFLUI

14. Metering

Pulse-counter logic PCFCNT
Pulse-counter logic (PCFCNT) function counts externally
generated binary pulses, for instance pulses coming from
an external energy meter, for calculation of energy
consumption values. The pulses are captured by the binary
input module and then read by the PCFCNT function. A
scaled service value is available over the station bus. The
special Binary input module with enhanced pulse counting
capabilities must be ordered to achieve this functionality.
Hitachi Power Grids
th
order. It helps the user to
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Function for energy calculation and demand handling
ETPMMTR
Power system measurement (CVMMXN) can be used to
measure active as well as reactive power values. Function
for energy calculation and demand handling (ETPMMTR)
uses measured active and reactive power as input and
calculates the accumulated active and reactive energy
pulses, in forward and reverse direction. Energy values can
be read or generated as pulses. Maximum demand power
values are also calculated by the function. This function
includes zero point clamping to remove noise from the input
signal. As output of this function: periodic energy
calculations, integration of energy values, calculation of
energy pulses, alarm signals for limit violation of energy
values and maximum power demand, can be found.
The values of active and reactive energies are calculated
from the input power values by integrating them over a
selected time tEnergy. The integration of active and reactive
energy values will happen in both forward and reverse
directions. These energy values are available as output
signals and also as pulse outputs. Integration of energy
values can be controlled by inputs (STARTACC and
STOPACC) and EnaAcc setting and it can be reset to initial
values with RSTACC input.
The maximum demand for active and reactive powers are
calculated for the set time interval tEnergy and these values
are updated every minute through output channels. The
active and reactive maximum power demand values are
calculated for both forward and reverse direction and these
values can be reset with RSTDMD input.
1MRK 505 373-BEN P
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