Tettex MIDAS 2881, Operating Instructions Manual

Page: 9 / 164

Introduction III
9 Instrument Storage 105
10 Packing and Transport 106
11 Recycling 107
12 Trouble Shooting 108
12.1 Software Updates ....................................................................................... 108
13 Conformity 109
Appendix 110
14 Applications Guide 111
14.1 Bushings ..................................................................................................... 111
14.1.1 Spare Bushings ........................................................................... 113
14.1.2 Installed Bushings ....................................................................... 114
14.1.3 Measuring Data Interpretation ..................................................... 118
14.2 Transformers .............................................................................................. 119
14.2.1 Power and Distribution Transformers .......................................... 119
14.2.2 Shunt Reactors ........................................................................... 125
14.2.3 Current Transformers .................................................................. 126
14.2.4 Voltage Transformers ................................................................. 127
14.2.5 Short Circuit Impedance ............................................................. 128
14.2.6 Excitation Current Measurement ................................................. 130
14.3 Rotating Machines ...................................................................................... 132
14.3.1 Test Procedure ........................................................................... 132
14.3.2 Measuring Data Interpretation ..................................................... 133
14.3.3 Measuring high cap values using the Resonating Inductor ......... 135
14.3.4 Operation of Resonating Inductor with Midas ............................. 136
14.4 Liquid Insulation .......................................................................................... 137
14.4.1 Test Procedure ........................................................................... 137
14.4.2 Measuring Data Interpretation ..................................................... 138
14.5 Cables ........................................................................................................ 139
14.5.1 Test procedures on different cables ............................................ 139
14.5.2 Test Procedure Example ............................................................ 140
14.5.3 Measuring Data Interpretation ..................................................... 141
14.6 Capacitors .................................................................................................. 141
14.6.1 Measuring high cap values using the Resonating Inductor ......... 142
14.7 Circuit Breakers .......................................................................................... 143
14.7.1 Dead Tank Breaker ..................................................................... 145
14.7.2 Live Tank Breaker ....................................................................... 146
14.7.3 Measuring Data Interpretation ..................................................... 147
14.8 Surge (Lightning) Arresters ......................................................................... 147
14.8.1 Test Levels .................................................................................. 147
14.8.2 Test Procedures .......................................................................... 148
14.8.3 Measuring Data Interpretation ..................................................... 150
Index 151