Current Transformer

For the same reasons necessitating the use of potential (voltage) instrument transformers, we also see the use of current transformers to reduce high current values and isolate high voltage values between the electrical power system conductors and panel-mounted instruments. See basic introduction to Current Transformers Below, or you can skip to read the text below: … Read more

What is Earthing Screen and How it works


The earthing screen is a network of copper conductors (generally called shield or screen) that is generally mounted over the electrical equipment in an electric power station. An Electrical substation houses expensive electrical equipment and devices. In case of lighting thunders, there is a chance that lightning strokes might directly hit the equipment at the … Read more

Voltage Regulation of a Transmission Line should be – Electrical Engineering MCQ

Electrical Engineering MCQ on Power Transmission Voltage Regulation of a Transmission Line should be Correct answer: 1. As low as possible Explanation: Voltage regulation of transmission lines should be as low as possible. Voltage regulation should be minimum in the case of transmission lines since minimum regulation means increases in load current will have a minimum effect … Read more

Zener Diode – The Ultimate Beginner Guide

What is Zener Diode A Zener diode is a special type of semiconductor diode designed to operate in the reverse-biased breakdown region. Zener diode maintains a nearly constant dc voltage while operated in proper conditions. Zener diodes are silicon based discrete semiconductor diodes that allow electric current to flow bidirectionally – either reverse or forward. … Read more

Series and Parallel Circuits – Top 5 Differences, Circuit Diagram and Explanation

In Electrical Engineering, two-terminal components can be connected in series or parallel configurations.  Electrical components connected in series are along a single “electrical path”. Each component in the series network has the same flow of electric current through it. The flow of current through any component is equal to the current through the network. The … Read more

Torque Formula in Electrical Motors

We previously studied four induction motor formulas relating: In this article an expansion of Torque Formula in Electrical Motors is presented below. The torque (T) of a motors is directly proportional to its power (P) and inversely proportional to its rotational speed or RPM (N). The mathematical formula relating torque, power, and rotational speed is: … Read more

Simplex vs Duplex Windings in DC Machines

The term simplex and duplex windings are linked to DC machines the rotor/armature winding in DC machines are classified into two types based on the plex of windings. Differences between Simplex and Duplex Windings Feature Simplex Windings Duplex Windings Rotor Construction It comprises of a single, complete, closed winding wound on a rotor It comprises … Read more

Turbo Alternator – Introduction, Working, and Construction

The turbo generator is an electrical generator that is connected to the shaft of a steam turbine or gas turbine for electric power generation. Turbo generators are employed for high shaft rotational speeds (usually steam and gas turbines). Its rotor is of non-salient pole-type construction that usually has two poles. Two pole turbo alternators operate … Read more