Kapp had designed a diagram shown in Figure 1.42 to determine the regulation at any power factor. The description of…
Two types of losses occur in a transformer: Core loss or iron loss occurs in a transformer because it is…
Figure 1.35 Open Circuit Test From this test, we can determine core loss and no-load current (I0) of the transformer. Figure…
It is required to connect a second transformer in parallel with the first transformer if the load exceeds the rating…
The ratio of output in watts to input in watts is called commercial efficiency of a transformer. Distribution transformers are used for…
INDUCED EMF An emf is induced in the conductor either (i) dynamically or (ii) statically. In the first case, the…
Figure 1.19 shows Buchholz relay having two elements mounted in a small chamber. It is located in the pipe connection…
The voltage regulation up is expressed mathematically by Positive sign is for lagging power factor and negative sign is for…
Figure 1.10 Concentric Windings Concentric windings are classified into four following groups: (i) Spiral windings. (ii) Helical windings. (iii) Cross-over windings.…
Satisfactory operation of a transformer solely depends on the condition of the oil. It is required to keep the oil…