Feature Measurement - Omron K7DD User Manual

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Feature Measurement

In order to determine how much the target device has deteriorated, the K7DD calculates 142 types of
feature values based on the current and voltage, and records them as measurement values. The K7DD
unit can monitor 9 types of feature values. The Support Tool can monitor the measurement results of all
feature values. Refer to Chapter 5 for details on all feature values.
The feature values that can be monitored on the K7DD unit are as follows:
ID Feature value
R.M.S. voltage
0
Voltage
4
fundamental
amplitude
Voltage total
5
harmonic
distortion
R.M.S. current
6
Current
10
fundamental
amplitude
Current total
136
harmonic
distortion
Active power
137
Power factor
140
Power
141
frequency
For the feature monitoring range, refer to the table in
Power Line Data Generator User's Manual (N233)
Description
The R.M.S. value is the AC value that actually does
the work, representing "the value of AC voltage that
produces the same power as that of DC".
The fundamental used in the K7DD indicates the
power frequency (ID141). It is an amplitude of the
voltage component of the fundamental.
This value represents the ratio of the magnitude of all
harmonic components to the magnitude of the voltage
fundamental, expressed as a percentage. It is a
measure of how much the total harmonic component
distorts the fundamental waveform.
The R.M.S. value is the AC value that actually does
the work, representing "the value of AC current that
produces the same power as that of DC".
The fundamental used in the K7DD indicates the
power frequency (ID141). It is an amplitude of the
current component of the fundamental.
This value represents the ratio of the magnitude of all
harmonic components to the magnitude of the current
fundamental, expressed as a percentage. It is a
measure of how much the total harmonic component
distorts the fundamental waveform.
Refers to the power that is actually consumed as
power.
Represents the ratio of active power to apparent
power. The power factor (PF) is calculated as an
R.M.S. value that includes harmonic components.
The larger the harmonic current component, the lower
the power factor.
This is a numerical expression of how many times an
AC wave is repeated per second.
4 K7DD Function
Unit
[V]
[V]
[%]
[A]
[A]
[%]
[kW]
[-]
[Hz]
6-3-1 Feature Value Range for Monitoring.
Monitorable wiring
state
Single
3P3W2M
phase
3P4W
current
×

4
 ×
 ×
 
 
 
 ×
 ×
 
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