128
Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
Chapter 5
Metering
Table 37 - Metering Parameters Associated with THD
Line Frequency
The SMC-50 control module measures and displays the system 3-phase AC Line
Frequency. Upon power up, the Line Frequency parameter displays zero until a
valid AC Line Frequency is measured. When three-phase power is removed from
the controller, the parameter maintains the value of the previous frequency
reading.
Table 38 - Metering Parameters Associated with Line Frequency
Current Imbalance
The SMC-50 control module provides a calculated Current Imbalance value.
The Current Imbalance calculation is equal to the largest deviation of the three
RMS phase current signals from the average RMS phase current, divided by the
average. Note that the controller Power Pole Current is used for the Current
Imbalance calculation.
Table 39 - Metering Parameters Associated with Current Imbalance
Parameter Number
Name/Description Min/Max Value Default Value
Access
Units
35
THD V
a
0.0…1000.0
0.0
R
%
36
THD V
b
37
THD V
c
38
THD V
ave
39
THD I
a
40
THD I
b
41
THD I
c
42
THD I
ave
Parameter Number
Name/Description
Min/Max
Value
Default
Value
Access
Units
224
Line Frequency
0…100
0
R
Hz
Parameter Number
Name/Description
Min/Max Value Default
Value
Access
Units
295
Current Imbalance
0…100
0
R
%
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 ...
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