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•Tertiary voltage generated at buried TV winding has no importance for user; typically such TV winding is delta connected and provides the path for zero-sequence currents during short-circuit and suppresses third harmonic (and its multiples) currents. Transformer Consulting Services Inc. Transformer Design: Tertiary Voltage (TV)
This revision of the guide incorporates various changes in cable installation philosophies that have occurred since the 1992 version of the guide. Significant changes have been made in the following areas:
2000 kVA or two 1000 kVA MV/LV transformers. The purpose of this guide is to give an overview of the guidelines and requirements specified by current regulations for the design and construction of substations in order to guide the designer and the user to the correct system choices. The document will only touch on a few topics such as the
Power Transformer Fundamentals: Design and Manufacturing Waldemar Ziomek, Engineering Manager CG Power Systems Canada Inc IEEE Training, Houston, Texas, Oct.8-9, 2013 Overview •Transformer Design –Transformer Types –Construction and Parts •Core & Coils –Electrical design •Losses & Impedance •Thermal, Dielectric & Short Circuit
Transformer Consulting Services Inc. Manufacturing Process: Core Cutting • “Core Form Design” • Fully mitered & step lapped in corner joints improves flux distribution, minimizes losses & sound level • Circular core shape provides windings with optimum radial support
DC Resistance and Capacitance. DC Resistance is a direct function of wire thickness. The resistance can be reduced by using thicker wire or multiple strands in parallel. Intrawinding Capacitance on the Primary side can increase switching losses. This can be reduced by using thicker insulated wire to increase the distance between turns.
The GUI is designed in such a way to allow the user to enter the resistances and reactance of the primary and the secondary sides, the resistance and reactance that represent the core, the rating of the transformer and the transformer turn ratio.
