TIDUFG0 November   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
      1. 2.1.1 PCB Rogowski Coils
      2. 2.1.2 Integrator Stage
      3. 2.1.3 Input Stage
      4. 2.1.4 Differential Amplifier Stage
      5. 2.1.5 High-Bandwidth, Low-Noise Amplifier Stage
        1. 2.1.5.1 Hybrid Integrator
        2. 2.1.5.2 Band Pass Filter
        3. 2.1.5.3 Logarithmic Amplifier
    2. 2.2 Design Considerations
      1. 2.2.1 Component Selection
      2. 2.2.2 RC Component Selection
      3. 2.2.3 Gain Setting
    3. 2.3 Highlighted Products
      1. 2.3.1 INA333
      2. 2.3.2 TLV9002
      3. 2.3.3 LM2664
      4. 2.3.4 TLV2387
      5. 2.3.5 LOG300
      6. 2.3.6 TL081H
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
      1. 3.2.1 Metering Setup
        1. 3.2.1.1 Accurate Current Source
        2. 3.2.1.2 TIDA-010987
        3. 3.2.1.3 ADS131M08 Metrology Evaluation Module
        4. 3.2.1.4 GUI
      2. 3.2.2 5kHz to 50kHz Band Pass and Logarithmic Amplifier Test Setup
        1. 3.2.2.1 Oscilloscope
        2. 3.2.2.2 Function Generator
    3. 3.3 Test Results
      1. 3.3.1 No Load Conditions
        1. 3.3.1.1 Objective
        2. 3.3.1.2 Setup
        3. 3.3.1.3 Requirements
        4. 3.3.1.4 Results
      2. 3.3.2 Starting Load Test
        1. 3.3.2.1 Objective
        2. 3.3.2.2 Setup
        3. 3.3.2.3 Requirements
        4. 3.3.2.4 Results
      3. 3.3.3 Active Power Measurements
        1. 3.3.3.1 Objective
        2. 3.3.3.2 Setup
        3. 3.3.3.3 Requirements
        4. 3.3.3.4 Results
      4. 3.3.4 Variation of Power factor
        1. 3.3.4.1 Objective
        2. 3.3.4.2 Setup
        3. 3.3.4.3 Requirements
        4. 3.3.4.4 Results
      5. 3.3.5 Variation of Voltage Test
        1. 3.3.5.1 Objective
        2. 3.3.5.2 Setup
        3. 3.3.5.3 Requirements
        4. 3.3.5.4 Results
      6. 3.3.6 Variation of Frequency
        1. 3.3.6.1 Objective
        2. 3.3.6.2 Setup
        3. 3.3.6.3 Requirements
        4. 3.3.6.4 Results
      7. 3.3.7 Band Pass
        1. 3.3.7.1 Objective
        2. 3.3.7.2 Setup
        3. 3.3.7.3 Requirements
        4. 3.3.7.4 Results
      8. 3.3.8 Logarithmic Amplifier
        1. 3.3.8.1 Objective
        2. 3.3.8.2 Setup
        3. 3.3.8.3 Requirements
        4. 3.3.8.4 Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
    2. 4.2 Tools
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

3.3.4.4 Results

Table 3-3 and Table 3-4 show the variation of power factor results at different conditions.

Table 3-3 Variation of Power Factor Results at 60 Degrees
Current (60 DEGREES) LEADING
Error 1 Error 2 Error 3 Error 4 Error 5 Error 6 AVG Error % Delta Error Delta From REF Limit (%)
[Class 0.5] 		Limit (%)
[Class 0.2]
1.500 0.035 0.113 0.109 0.005 –0.103 –0.122 0.006 0.235 (REF) NA NA
3.000 –0.180 0.099 0.082 –0.110 0.102 0.055 0.008 0.282 –0.002 1.000 0.500
15.000 –0.028 –0.048 –0.045 0.073 0.023 –0.009 –0.006 0.121 (REF) NA NA
15.000 –0.040 –0.181 0.018 0.036 0.080 –0.013 –0.017 0.261 0.011 0.600 0.300
50.000 0.027 0.017 0.014 0.010 0.033 0.040 0.024 0.030 (REF) NA NA
50.000 0.055 0.020 0.032 0.073 0.026 0.003 0.035 0.070 –0.011 0.600 0.300
100.000 0.066 0.061 0.068 0.059 0.072 0.074 0.067 0.015 (REF) NA NA
100.000 –0.042 –0.036 –0.062 –0.056 –0.051 –0.021 –0.045 0.083 0.111 0.600 0.300
Table 3-4 Variation of Power Factor Results at 323.13 Degrees
CURRENT (323.13 DEGREES) LAGGING
ERROR 1 ERROR 2 ERROR 3 ERROR 4 ERROR 5 ERROR 6 AVG ERROR% DELTA ERROR DELTA FROM REF LIMIT (%)
[CLASS 0.5] 		LIMIT (%)
[CLASS 0.2] 		LIMIT (%)
[CLASS 0.1]
1.500 0.035 0.113 0.109 0.005 –0.103 –0.122 0.006 0.235 (REF) NA NA NA
3.000 0.086 0.012 –0.120 –0.092 –0.062 0.053 –0.021 0.206 0.027 1.000 0.500 0.250
15.000 –0.028 –0.048 –0.045 0.073 0.023 –0.009 –0.006 0.121 (REF) NA NA NA
15.000 0.022 –0.038 –0.115 –0.086 –0.104 –0.001 –0.054 0.137 0.048 0.600 0.300 0.150
50.000 0.027 0.017 0.014 0.010 0.033 0.040 0.024 0.030 (REF) NA NA NA
50.000 0.074 0.104 –0.012 0.027 –0.007 0.009 0.033 0.116 –0.009 0.600 0.300 0.150
100.000 0.066 0.061 0.068 0.059 0.072 0.074 0.067 0.015 (REF) NA NA NA
100.000 0.093 0.104 0.106 0.100 0.109 0.118 0.105 0.025 –0.038 0.600 0.300 0.150