Megger MVCT - Page 3

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6.5 Insulation Test: .................................................................................................................................. 111
6.6 Burden Test ......................................................................................................................................... 114
6.7 Manual Test ......................................................................................................................................... 118
6.8 Demagnetization ............................................................................................................................... 121
6.9 Self Test ................................................................................................................................................. 123
7.0 Testing VT’s with MVCT ...................................................................................................... 125
7.1 Running a Complete Test of VT and Test Plan Creation ................................................... 125
7.2 Testing VT Ratio and Phase ......................................................................................................... 131
7.3 Testing Voltage Transformer – Saturation/Excitation Test ............................................ 135
7.4 Testing Voltage Transformer Winding Resistance : .......................................................... 138
7.5 Testing Voltage Transformer: Secondary Short Circuit Impedance ........................... 141
7.6 Testing Voltage Transformer : Demagnetization ................................................................ 145
7.7 Testing Voltage Transformer: Self Diagnostic ...................................................................... 147
8.0 Testing Relays with MVCT .................................................................................................. 149
9.0 Service Data ............................................................................................................................. 149
9.1 Preventive Maintenance ................................................................................................................ 149
9.1.1 Examine the unit every six months for: ..................................................................... 150
9.1.2 Upgrading Software .................................................................................................. 150
9.2 Service and Repair Instructions ................................................................................................. 151
9.2.1 Basic Troubleshooting ............................................................................................... 151
10.0 Preparation for Reshipment .............................................................................................. 152
Appendix I CTs Mounted on Transformer Bushings ............................................................ 154
Appendix II Testing CT in Reactor .............................................................................................. 157
Appendix III CTs Inside Delta Connection ............................................................................... 159