Tettex 2293 - Demagnetization; Theory; Heat Run - Cooling Curve; Performing a resistance measurement (cooling curve)

IV
Introduction
7.5 Performing a test using Classic mode ........................................................ 67
7.5.1 Test object connection on classic mode ........................................ 67
7.5.2 Set up DUT data ........................................................................... 67
7.5.3 Temperature correction ................................................................. 67
7.5.4 Test current selection .................................................................... 68
7.5.5 Auto recoding configuration ........................................................... 69
7.5.6 Measurement ................................................................................ 69
7.6 Temperature Measurement........................................................................ 72
8 Demagnetization 74
8.1 Theory ........................................................................................................ 74
8.2 User interface ............................................................................................. 75
8.2.1 Active Window ............................................................................... 75
8.3 Performing a demagnetization ................................................................... 76
8.3.1 Measurement steps ....................................................................... 76
8.3.2 Parameters definition .................................................................... 76
8.3.3 Demagnetizing .............................................................................. 78
8.4 Application hints ......................................................................................... 78
9 Heat Run – Cooling Curve 79
9.1 Theory ........................................................................................................ 79
9.2 User interface ............................................................................................. 80
9.2.1 Active Window ............................................................................... 80
9.3 Performing a resistance measurement (cooling curve) .............................. 82
9.3.1 Phases and winding selection ....................................................... 82
9.3.2 Resistance measurements recording interval ............................... 82
9.3.3 Test current selection .................................................................... 83
9.3.4 Temperature settings .................................................................... 84
9.3.5 Tap changer position selection ...................................................... 84
9.3.6 Measurement Single Phase .......................................................... 85
9.3.7 Measurement 3 Phase Sequential ................................................ 85
9.3.8 View Results ................................................................................. 85
9.3.9 Export results ................................................................................ 86
10 Heat Run - Temperature Rise 87
10.1 Overview .................................................................................................... 87
10.2 User Interface ............................................................................................ 87
10.2.1 Active Window ............................................................................... 89
10.2.2 Function keys ................................................................................ 89
10.3 Performing a Temperature Rise Test ......................................................... 90
10.3.1 Measurement Steps ...................................................................... 90
10.3.2 Recording Settings ........................................................................ 91
10.3.3 Temperature Settings .................................................................... 92
10.3.4 Liquid Cooled Transformer Measurement ..................................... 93
10.3.5 Dry Type Transformer Measurement ............................................ 95
10.3.6 View Results ................................................................................. 96
10.4 Export Results ............................................................................................ 96