INSTRUCTION MANUAL - Tomography

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ROTOR RSO REFLECTOMETER TYPE TDR100 and TDR100RB INSTRUCTION MANUAL Issue 11 April 2014 Process Tomography Ltd., 64, Courthill House,Water Lane, Wilmslow, Cheshire. SK9 5AJ. UK Phone/Fax +44 - (0) - 1625 - 418722 Email: Website: Copyright Process Tomography Ltd. and Convex Design Ltd. 2014 2CONTENTS 1. Principle of Operation 2. Operating instructions 3. Interpretation of Results 4. Delay Line Test Unit 5. Use of Digital Oscilloscopes 6. References 7. Note on analogue oscilloscopes APPENDIX 1 Additional information for TDR100RB version 2 Use of padded case SAFETY WARNING The use of this equipment on a rotor installed in an operational generator must be carried out with the explicit permission and under the supervision of the local plant operator.

4 1. INTRODUCTION 1.1 GENERATOR ROTOR WINDING FAULTS Figure 1.1 A typical generator field rotor (courtesy of GE Power Systems) Large high-speed electrical generators use a rotating magnetic field produced by a

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