Vanguard EZCT-S2A - Manual (Page 4)

EZCT S2A USER’S MANUAL REV 1
iii
5.1 Performing a Diagnostics Test ....................................................................................... 78
5.2 Verifying the EZCT S2A’s V
x
Sense Circuit Using an External Meter .............................. 80
5.3 Verifying the EZCT S2A’s I
x
Sense Circuit Using an External Meter ............................... 81
5.4 Quickly Verifying the EZCT S2A’s Turns Ratio Circuit ..................................................... 82
5.5 Troubleshooting Guide .................................................................................................. 83
6.0 UPGRADING FIRMWARE .................................................................................................... 84
7.0 Appendix A - Calculating Turns Ratio on a Shunt Reactor ................................................. 87
LIST OF TABLES
Table 1. EZCT S2A Technical Specifications .................................................................................... 4
Table 2. Functional Descriptions of EZCT S2A Controls and Indicators .......................................... 6
Table 3. Descriptions of Tabulated Test Results Elements ........................................................... 22
Table 4. Description of Test Plan Elements .................................................................................. 50
LIST OF FIGURES
Figure 1. EZCT S2A Controls and Indicators .................................................................................... 5
Figure 2. Typical EZCT S2A Excitation and Ratio Test Cable Connection ........................................ 9
Figure 3. Bushing CT Connection on Delta Transformer .............................................................. 10
Figure 4. Bushing CT Connection on Y Transformer ..................................................................... 10
Figure 5. Typical EZCT S2A Tabulated Report Printout ................................................................. 21
Figure 6. Typical EZCT S2A Graphic Report ................................................................................... 23
Figure 7. Typical Internal Test Record Directory Printout ............................................................ 36
Figure 8. Typical EZCT S2A Flash EEPROM Test Plan Directory Printout ...................................... 46
Figure 9. Typical USB Flash Drive Test Plan Directory Printout .................................................... 48
Figure 10. Typical Test Plan Printout ............................................................................................ 50
Figure 11. Graphic Report Showing Knee Point Marker ............................................................... 69
Figure 12. Buried CT in a Delta Transformer Illustration 1 ........................................................... 73
Figure 13. Buried CT in a Delta Transformer Illustration 2 ........................................................... 73
Figure 14. Sample Raw Data Printout ........................................................................................... 77
Figure 15. EZCT S2A V
x
Verification Test Connections .................................................................. 80
Figure 16. EZCT S2A I
x
Verification Test Connections ................................................................... 81
Figure 17. EZCT S2A Turns Ratio Verification Test Connections ................................................... 82
Figure 18 ....................................................................................................................................... 87
Figure 19 ....................................................................................................................................... 88
Figure 20 ....................................................................................................................................... 89
Figure 21 ....................................................................................................................................... 90
Figure 22 ....................................................................................................................................... 91
Figure 23 ....................................................................................................................................... 92
Figure 24 ....................................................................................................................................... 93
Figure 25 ....................................................................................................................................... 93