Reactive Power Measurement
Reactive power is the power required by inductive devices (motors, transformers etc.) in power system to create magnetic field necessary…
Neutral Inversion and Neutral Displacement
Neutral inversion, Neutral shift or Neutral voltage displacement is the phenomenon in which the imaginary neutral of an ungrounded system…
Medium Voltage Cable Construction
A power cable could appear as a simple electrical device, a conductor wrapped in an insulation. However, as you can…
Ferroresonant Transformer
What is a Ferroresonant transformer? Ferroresonant transformer also known as Constant Voltage Transformer (CVT) is used to provide: Voltage sag…
Voltage Sag due to Induction motor starting
Motor Starting Current: Induction motor starting on full voltage (also known as across the line starting or direct on-line starting)…
AC Voltage Drop and System Power Factor
Flow of DC current through a resistance result in voltage drop according to ohms law. For AC circuits, in addition…
Voltage Regulation
To engineers, ‘regulation’ means variation of output speed or voltage as the load on that device is increased from…
Phase Sequence and Phase Angle
Phase rotation or phase sequence is a concept that is not well understood and misapplied in many installations. Lets dive…
Scott T Transformer
Scott connection is a method of achieving 3 phase to 2 -phase transformation by using two single-phase transformers.
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Transformer Impedance : Why is impedance in percentage?
Ever wondered what is the %Z or %impedance or short circuit impedance that everyone refers to when talking about power…