## LOSSES IN A TRANSFORMER

Two types of losses occur in a transformer: Core loss or iron loss occurs in a transformer because it is subjected to…

## Kapp’s Regulation

Kapp had designed a diagram shown in Figure 1.42 to determine the regulation at any power factor. The description of the construction…

## EXACT VOLTAGE DROP

In Figure 1.40, the exact voltage drop is AH instead of AG. During calculation of approximate voltage drop, AG has already been…

## EFFICIENCY OF A TRANSFORMER

Due to the losses in a transformer, its output power is less than the input power. ∴ Power output = Power input…

## D.C. Series Generators in Prarallel

Consider two d.c. series generators in parallel as shown in the Fig. 1. Fig. 1 If no load voltages E1 and …

## D.C. Shunt Generators in Parallel

For stable parallel operation, the most suitable type of d.c. generator is shunt generator as it has slightly drooping characteristics. If there…

## D.C. Compound Generators in Parallel

Consider two compound generators 1 and 2 running in parallel as shown in the Fig. 1. Fig. 1 As the voltage…

## Critical Field Resistance in D.C. Shunt Generator

Consider the field magnetization characteristics of a d.c. shunt generator shown in the Fig. 1. Fig. 1 Concept of critical resistance …

## Construction of a DC Machine And working of dc motor

As stated earlier, whether a machine is d.c. generator or a motor the construction basically remains the same as shown in the…

## CALCULATION FOR VOLTAGE REGULATION

The voltage regulation up is expressed mathematically by Positive sign is for lagging power factor and negative sign is for leading power…