Transient Temperature Rise of Transformers

Abstract

Equations are developed for transient temperature rise of transformer cooling medium and various types of transformer coils over their ambient medium. These are evaluated on a percent temperature rise base for the corresponding powers of the watts dissipated for transformer cooling medium and various types of transformer coils. Included are the cases of both constant watts input and constant current input. The percentage of transient temperature rise when the time constant equals the loading time is accurately shown for each case.