Sumpner Test of Transformer: While OC and SC tests on a transformer yield its equivalent circuit parameters, these cannot be used for the 'heat run' test wherein the purpose is to determine the steady temperature…

Transformer Testing Methods: Two chief difficulties which do not warrant the Transformer Testing Methods by direct load test are: Large amount of energy has to be wasted in such a test, It is a stupendous…

Transformer Nameplate Rating: Transformer Nameplate Rating Details - The voltage ratio is specified as V1 (rated)/V2 (rated). It means that when voltage V1 (rated) is applied to the primary, the secondary voltage on full load…

Phasor Diagram of Transformer: For the approximate equivalent circuit of Phasor Diagram of Transformer is shown in Fig. 3.16(b) The phasor diagram corresponding to this equation is drawn in Fig. 3.17(a) for the lagging power…

Approximate Equivalent Circuit of Transformer: Approximate Equivalent Circuit of Transformer - In constant frequency (50 Hz) power transformers, approximate forms of the exact T-circuit equivalent of the transformer are commonly used. With reference to Fig.…

Real Transformer On Load Condition | Equivalent Circuit: Figure 3.11 shows a Real Transformer On Load Condition. Both the primary and secondary have finite resistances R1 and R2 which are uniformly spread throughout the winding;…

Ideal Transformer on Load: In order to visualize the effect of flow of secondary current in a transformer, certain idealizing assumptions will be made which are close approximations for a practical transformer. A transformer possessing…

Phasor Diagram of Transformer on No Load: Figure 3.5 shows the schematic diagram of a Phasor Diagram of Transformer on No Load with Two Winding, i.e. the secondary terminals are open while the primary is…

Forced Cooling in Transformer: Forced Cooling in Transformer - For transformer sizes beyond 5 MVA additional cooling would be needed which is achieved by supplementing the tank surface by a separate radiator in which oil…