Power Transformers

Consultant specializing in power transformers, primarily working for utilities. In this context he has established working relationships with transformer manufacturers on several continents. His background with Ferranti and the UK’s Central Electricity Generating Board (CEGB) included transformer design and the management and maintenance of transformer-based systems.

Procurement of Transformers: Transformer specifications - IEC and BS; Procurement specifications; Test requirements; Schedule of technical particulars; Model specifications. Surveillance during manufacture: Inspection during manufacture; Works testing. Installation of transformers: Installation of outdoor oil-filled transformers; Site testing and commissioning; Installation of transformers indoors. Transformer rating: Losses in transformers; IEC ratings; Other methods of rating transformers; Transformer impedance. Voltage control: Voltage regulation on a system; Effect of tappings on flux density, HV tappings for HV variation, HV tappings for LV variation; Tapping requirements for generator step-up transformers; Operation of on-load tapchangers. Parallel operation: Requirements for satisfactory operation in parallel; Parallel operation with on-load tapchangers. Protection of Transformers: Protection of the transformer from the system; Protection of the system from the transformer. Maintenance in service: Routine maintenance; Condition monitoring. Appendices.