Vanguard EZCT-2000A - Manual (Page 4)

EZCT-2000A USER’S MANUAL REV 1
iii
4.3 Setting the Clock ............................................................................................................ 81
5.0 DIAGNOSTICS, VERIFICATION, AND TROUBLESHOOTING ................................................. 83
5.1 Performing a Diagnostics Test ....................................................................................... 83
5.2 Verifying the EZCT-2000A’s V
x
Sense Circuit Using an External Meter ......................... 85
5.3 Verifying the EZCT-2000A’s I
x
Sense Circuit Using an External Meter ........................... 86
5.4 Quickly Verifying the EZCT-2000A’s Turns Ratio Circuit ................................................ 87
5.5 Troubleshooting Guide .................................................................................................. 88
7.0 Appendix A - Calculating Turns Ratio on a Shunt Reactor ................................................. 92
LIST OF TABLES
Table 1. EZCT-2000A Technical Specifications ................................................................................ 5
Table 2. Functional Descriptions of EZCT-2000A Controls and Indicators ..................................... 7
Table 3. Descriptions of Tabulated Test Results Elements ........................................................... 25
Table 4. Description of Test Plan Elements .................................................................................. 57
LIST OF FIGURES
Figure 1. EZCT-2000A Controls and Indicators ............................................................................... 6
Figure 2. Typical EZCT-2000A Excitation and Ratio Test Cable Connection ................................. 10
Figure 3. Bushing CT Connection on Delta Transformer .............................................................. 11
Figure 4. Bushing CT Connection on Y Transformer ..................................................................... 11
Figure 5. Sample CT Name Plate ................................................................................................... 12
Figure 6. Typical EZCT-2000A Tabulated Report Printout ............................................................ 24
Figure 7. Typical EZCT-2000A Graphic Report .............................................................................. 26
Figure 8. Typical EZCT-2000A Graphic Report with Multiple Plot Curves .................................... 26
Figure 9. Typical Internal Test Record Directory Printout ............................................................ 38
Figure 10. Typical USB Flash Drive Record Directory Printout ..................................................... 40
Figure 11. Typical EZCT-2000A Flash EEPROM Test Plan Directory Printout ............................... 53
Figure 12. Typical USB Flash Drive Test Plan Directory Printout .................................................. 55
Figure 13. Typical Test Plan Printout ............................................................................................ 57
Figure 14. Graphic Report Showing Knee Point Marker ............................................................... 75
Figure 15. Buried CT in a Delta Transformer Illustration 1 ........................................................... 79
Figure 16. Buried CT in a Delta Transformer Illustration 2 ........................................................... 79
Figure 17. EZCT-2000A V
x
Verification Test Connections ............................................................. 85
Figure 18. EZCT-2000A I
x
Verification Test Connections .............................................................. 86
Figure 19. EZCT-2000A Turns Ratio Verification Test Connections .............................................. 87
Figure 20 ....................................................................................................................................... 92
Figure 21 ....................................................................................................................................... 93
Figure 22 ....................................................................................................................................... 94
Figure 23 ....................................................................................................................................... 95
Figure 24 ....................................................................................................................................... 96
Figure 25 ....................................................................................................................................... 97
Figure 26 ....................................................................................................................................... 98
Figure 27 ....................................................................................................................................... 98