Construction Of Single-Phase Transformer
Magnetic core and windings (or coils) are the two basic parts of any transformer. The core is made of silicon or sheet…
Types Of D.C. Motors
Similar to the d.c. generators, the d.c. motors are classified depending upon the way of connecting the field winding with the armature…
Basic Electrical Engineering Interview Questions
Q.1 What does 10V AC mean? Is it the RMS voltage or Peak voltage or Average voltage? Answer. In general, AC voltages…
Per Unit Resistance, Leakage Reactance And Impedance Voltage Drop
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 current, I2fl be the…
Polarity Test Of A Single-Phase Transformer
Polarity testing of transformers is vital before connecting them in parallel. Otherwise, with incorrect polarity, it is not possible to connect them…
Sandwich Windings In Transformer
Figure 1.15 shows sandwich windings used in shell-type transformers. The high-voltage and low-voltage windings are split into a number of sections where…
Shell Type Transformer
Shell-type transformer has double magnetic circuit and three limbs. Both windings are placed on the central limb. The coils occupy the entire…
Separation Of Core (Or Iron) Losses In A Transformer
Hysteresis loss and eddy current loss are the components of the iron losses. For the applied fl ux density Bmax to the core, we…
Short Circuit Or Impedance Test
The main purpose of this test is to compute the following: Equivalent impedance of the transformer referred to primary and secondary. Cu…
Spiral Core Type Transformer
Figure 1.9 shows spiral core-type transformer where the core is assembled either of a continuous strip of the transformer steel wound in…