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6-7
6-1 Inspection and Maintenance
6
Inspection and Maintenance
Note 1: For voltage, use a measurement device that displays effective values of fundamental wave. For current
and electric power, use a measurement device that displays all effective values.
Note 2: The Inverter output waveform, under PWM control, may have a margin of error, especially at a low
frequency.
Use the above measurement devices and methods to ensure accuracy.
Note 3: General-purpose testers are not applicable for measurement in many cases.
Input
power
factor
Pf
I
Calculated from the measured values of power supply voltage E
I
, power
supply current I
I
, and input electric power W
I
.
Output
voltage
E
O
Between U-V, V-W, W-U
(E
U
) (E
V
) (E
W
)
Rectifier voltmeter
All effective
values
Output
current
I
O
Current U, V, W
(I
U
) (I
V
) (I
W
)
Moving-iron voltmeter
All effective
values
Output
electric
power
W
O
Between U-V, V-W
(W
01
) + (W
02
)
Electrodynamic wattmeter
All effective
values
Two-wattmeter method
Output
power
factor
Pf
O
Calculated from the measured values of output voltage E
O
, output current I
O
,
and output electric power W
O
.
Measurement
item
Measurement point
Measurement device
Note
Measurement value
reference
3
Pf
I
=
E
I
I
I
W
I
×
100 (%)
3
Pf
o
=
E
o
I
o
W
o
×
100 (%)
Summary of Contents for JX-A4004
Page 2: ......
Page 16: ...14 About This Manual ...
Page 19: ...Chapter 1 Overview 1 1 Functions 1 2 1 2 Appearance and Names of Parts 1 4 ...
Page 24: ......
Page 25: ...Chapter 2 Design 2 1 Installation 2 2 2 2 Wiring 2 7 ...
Page 79: ...Chapter 4 Functions 4 1 Monitor Mode 4 2 4 2 Function Mode 4 6 ...
Page 174: ...5 8 5 2 Troubleshooting 5 Maintenance Operations ...
Page 175: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 2 6 2 Storage 6 8 ...
Page 199: ...Appendix Appendix 1Parameter ListApp 2 Appendix 2Product Life CurveApp 18 ...
Page 217: ...INDEX ...
Page 220: ......