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…
Magnetic core and windings (or coils) are the two basic parts of any transformer. The core is made of silicon…
Full-load voltage of a transformer can be expressed as a fraction of the full-load terminal voltage. Let I1fl be the full-load primary…
Polarity testing of transformers is vital before connecting them in parallel. Otherwise, with incorrect polarity, it is not possible to…
Figure 1.15 shows sandwich windings used in shell-type transformers. The high-voltage and low-voltage windings are split into a number of…
Shell-type transformer has double magnetic circuit and three limbs. Both windings are placed on the central limb. The coils occupy…
Hysteresis loss and eddy current loss are the components of the iron losses. For the applied fl ux density Bmax to the…
The main purpose of this test is to compute the following: Equivalent impedance of the transformer referred to primary and…