Megger TTR20 - Page 7

AVTMTTR20 Rev 4 Dec 2015
iii
LIST OF ILLUSTRATIONS
Figure 1-1. TTR20 Single-Phase Test Set Block Diagram ..................................................... 4
Figure 3-1 TTR20 Display & Control Panel ........................................................................... 9
Figure 3-2 TTR20 Top Side Connector Panel ..................................................................... 10
Figure 4-1 Setup for Testing Single-Phase Transformer ..................................................... 13
Figure 4-2 Setup for Testing Single-Phase Autotransformer ............................................... 13
Figure 4-3 Setup for Testing Single-Phase, Type A Step Voltage Regulator ...................... 14
Figure 4-4 Setup for Testing Single-Phase, Type B Step Voltage Regulator ...................... 14
Figure 4-5 Setup for Testing X1 – X2 Winding of Distribution Transformer ......................... 15
Figure 4-6 Setup for Testing X3 – X2 Winding of Distribution Transformer ......................... 15
Figure 4-7 Setup for Testing X1 – X3 Winding of Distribution Transformer ......................... 15
Figure 4-8 Setup for Testing Unmounted Current Transformer ........................................... 18
Figure 4-9 Setup for Testing Taps on Multiple Tap CT ........................................................ 18
Figure 4-10 Setup for Testing BCT Mounted on Single-Phase Two-Winding Transformer ... 19
Figure 4-11 TTR20 Opening Display Screen ......................................................................... 20
Figure 4-12 Start Test Screen ............................................................................................... 21
Figure 4-13 Test in Progress Screen ..................................................................................... 22
Figure 4-14 TTR20 Test Result Screen ................................................................................. 22
Figure 4-15 Sample Test Report ........................................................................................... 23
Figure 4-16 Printer Configuration Printout ............................................................................. 24
LIST OF TABLES
Table 5-1 Troubleshooting Guide ........................................................................................ 30
Table 5-2 Self-test Error Messages ..................................................................................... 31
Table 5-3 Test Error Messages ........................................................................................... 31
Table 5-4 Miscellaneous Message ...................................................................................... 32
Table C-1 ANSI Transformer Winding Phase Relationship ................................................. 42
Table C-2. ANSI Transformer Winding Phase Relationship ................................................. 44