Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
33
Product Overview
Chapter 1
Excessive THD indicates a problem in the power source and/or the application.
This can have an adverse effect on the performance of the overall system. THD
Fault and Alarm parameters are available for both voltage THDV and current
THD I. A Fault and Alarm delay time and a level are also available to configure
each of these parameters.
Table 2 - THD Parameter List
Metering
Metering System
Power and operational monitoring parameters include:
• Current—The RMS current value is provided for each phase, plus the
average current of all three.
• Voltage—The RMS line-to-line and line-to-neutral voltage values are
provided while the motor is running and when stopped. The average of all
three is also provided.
• Line Frequency—The SMC-50 control module measures and provides
user access to the line frequency (Hz).
• Power—Real, reactive, and apparent power values are calculated for each
phase plus the total for all 3 phases. In addition, the current power demand
and the maximum power demand is provided.
• Power Factor—The value of the power factor is provided for each phase
and as a total of all three.
• Peak Starting Current—The SMC-50 control module stores the peak
average RMS motor current consumed for the last 5 start cycles.
• Total Harmonic Distortion (THD)—The SMC-50 control module
calculates and provides user access to the THD for the 3 line voltages and
3 motor currents, along with the average value of each.
• Voltage Unbalance—The calculation of the voltage unbalance signal is
provided.
• Current Imbalance—The calculation of the current imbalance signal is
provided.
• Motor Torque—Electromechanical motor torque is calculated based on
current and voltage feedback from the motor.
Parameter
Number
Parameter Name
(1)
(1) As displayed on the HIM or Connected Components Workbench configuration tools.
Minimum/Maximum Value Default Value
Access
Units
118
THD V F Lvl
0.0…1000.0
1000.0
R/W
%
119
THD V F Dly
0.1…99.0
0.1
SECS
120
THD V A Lvl
0.0…1000.0
1000.0
%
121
THD V A Dly
0.1…99.0
0.1
SECS
122
THD I F Lvl
0.0…1000.0
1000.0
%
123
THD I F Dly
0.1…99.0
0.1
SECS
124
THD I A Lvl
0.0…1000.0
1000.0
%
125
THD I A Dly
0.1…99.0
0.1
SECS
Содержание SMC-50
Страница 10: ...10 Rockwell Automation Publication 1560F UM001A EN P June 2019 Table of Contents Notes ...
Страница 12: ...12 Rockwell Automation Publication 1560F UM001A EN P June 2019 Preface Notes ...
Страница 68: ...68 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 2 Installation Notes ...
Страница 120: ...120 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 4 Programming Notes ...
Страница 130: ...130 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 5 Metering Notes ...
Страница 134: ...134 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 6 Optional HIM Operation Notes ...
Страница 144: ...144 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 7 Communications Notes ...
Страница 156: ...156 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 8 Diagnostics Notes ...
Страница 198: ...198 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 10 Maintenance Notes ...
Страница 240: ...240 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix A Parameter Information Notes ...
Страница 242: ...242 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix B Controller Duty Cycle Ratings Notes ...
Страница 250: ...250 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix C 1560F and 1562F Relay Control Notes ...
Страница 280: ...280 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix G Using DeviceLogix Notes ...
Страница 284: ...284 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix H Spare Parts Notes ...
Страница 286: ...286 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix I Accessories Notes ...
Страница 291: ......