Tap Changing Transformer

Tap Changing Transformer Tap Changing Transformer -Voltage variation in power systems is a normal phenomenon owing to the rapid growth of industries and distribution network. System voltage control is therefore essential for: Adjustment of consumers’ terminal voltage within prescribed limits. Control of real and reactive power flow in the network. Periodical adjustment (1-10%) to check […]

Phase Conversion

Phase Conversion: Three/Two-phase Conversion (Scott Connection): Phase conversion from three to two phase is needed in special cases, such as in supplying 2-phase electric arc furnaces. The concept of 3/2-phase conversion follows from the voltage phasor diagram of balanced 3-phase supply shown in Fig. 3.61(b). If the point M midway on VBC could be located, […]

Parallel Operation of Transformer

Parallel Operation of Transformer: When the load outgrows the capacity of an existing transformer, it may be economical to install another one in parallel with it rather than replacing it with a single larger unit. Also, sometimes in a new installation, two units in parallel, though more expensive, may be preferred over a single unit […]