Table. 5.2.1 - 24. Harmonic current measurements.
Name
Unit
Range
Step Default
Description
Harmonics
calculation
values
("Harm Abs.pr
Perc.")
-
0: Percent
1: Absolute
-
0:
Percent
Defines whether the harmonics are calculated as
percentage or absolute values.
Harmonics
display
-
0: Per unit
1: Primary A
2: Secondary A
-
0: Per
unit
Defines how the harmonics are displayed: in p.u. values,
as primary current values, or as secondary current
values.
Maximum
harmonics value
("IxxMaximum
harmonic")
A
0.000…1000000.000 0.001 -
Displays the maximum harmonics value of the selected
current input ILx or I0x.
Fundamental
frequency
("Ixx
fundamental")
A
0.000…1000000.000 0.001 -
Displays the current value of the fundamental frequency
measurement (RMS) from the selected current input ILx
or I0x.
Ixx harmonics
(2
nd
…31
st
harmonic)
A
0.000…1000000.000 0.001 -
Displays the selected harmonic from the current input
ILx or I0x.
5.2.2 Voltage measurement and scaling
The voltage measurement module (VT module, or VTM) is used for measuring the voltages from
voltage transformers. The measured values are processed into the measurement database and they
are used by measurement and protection functions (the protection function availability depends of the
relay type). It is essential to understand the concept of voltage measurements to be able to get correct
measurements.
Figure. 5.2.2 - 9. Voltage measurement terminology
PPRI:
RI: The primary voltage, i.e. the voltage in the primary circuit which is connected to the primary side of
the voltage transformer.
SEC:
SEC: The secondary voltage, i.e. the voltage which the voltage transformer transforms according to the
ratio. This voltage is measured by the protection relay.
Genera
Generattor Commander
or Commander
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00001
31
Summary of Contents for Generator Commander
Page 1: ...Generator Commander Instruction manual...
Page 2: ......
