3 Designs of DC Distribution Systems In Power Substations

The method of connection of the battery, battery charger, and DC distribution systems depends on the duty, the type or load, and whether the system needs to be duplicated or… Read more

Apr 20, 2016 | Energy and Power

Two Basic Methods Used For Braking a Motor (DC Injection and Dynamic)

Two common basic methods used for braking a motor are DC injection braking and dynamic braking. We will look at both in detail, starting with electric braking. DC Injection Braking… Read more

Apr 18, 2016 | Electric Motor

You can use water pipes for grounding purposes, but…

Water pipes have been used extensively in the past as a grounding electrode. Water pipe connections are not testable and are unreliable due to the use of tar coatings and… Read more

Apr 16, 2016 | Energy and Power

Why do we care so much about power factor correction?

Power factor, as every electrical engineer should know, is defined as the ratio of real power to volt-amperes and is the cosine of the phase angle between the voltage and current in… Read more

Apr 15, 2016 | Electrical Lectures

AC versus DC. Those were the days…

Take warning! Alternating currents are dangerous. They are fit only for powering the electric chair :) The only similarity between an AC and a DC lighting system is that they… Read more

Apr 13, 2016 | Electrical Lectures

5 anomalies in AC power that can damage your home devices

In addition to lightning, there are a number of other disturbances that can come in on the AC power lines and damage equipment. Some surge protectors can reduce or eliminate… Read more

Apr 11, 2016 | Power Quality

What would be the best conductor material for electrical wires and cables

The conductivity of copper is 65% higher than that of aluminium which means that the conductor size of similarly rated cables is proportionately smaller. Correspondingly less expense is then incurred… Read more

Apr 09, 2016 | Energy and Power

What Is The Energy, But For Real?

Energy is best defined as “the capacity for doing work”. Electricity is but one of many forms of energy. Other familiar forms of or descriptions of energy are thermal or… Read more

Apr 08, 2016 | Electrical Lectures

Power Measurement On Four-Wire System Using Wattmeter Methods

A four-wire system is suitable to supply unbalanced, three-phase loads or single phase loads distributed on all three phases of a low voltage installation. When measuring power on a three-phase… Read more

Apr 06, 2016 | Energy and Power

The basics of selectivity (discrimination) between circuit breakers

On economical grounds and for the reason of reliability of the service, it is not always ideal to interrupt the supply to the installation in the case of a fault… Read more

Apr 04, 2016 | Energy and Power

Six core activities in the commissioning of the earthing system

Commissioning of new earthing system is essential as a validation step for the design and installation process and for the design inputs. In most cases commissioning should measure the outputs… Read more

Apr 02, 2016 | Energy and Power

This is why every industrial plant MUST have an alarm system (for monitoring processes)

In industrial plants and installations, control systems are used to monitor and control processes. Control Systems, whether a conventional Control Desk or a Computer/PLCs System with SCADA or a Distributed… Read more

Apr 01, 2016 | Industrial Automation

Better understanding of transformer failures and maintenance necessity

Generally speaking, the transformer requires less care compared to other electrical equipment. But, as I already stated in some of the earlier technical articles, transformer failures can cause a huge… Read more

Mar 30, 2016 | Maintenance

10 Factors To Consider When Specifying Transformers

There are many factors that influence final specification of a transformer. However, the following ten factors MUST be considered when specifying transformers. Let’s name these ten factors: Kilovoltampere (kVA) Rating Voltage… Read more

Mar 28, 2016 | Energy and Power

Here is why you MUST use variable speed drives in pumping applications

Pumping applications represent a significant opportunity for applying variable speed drives (VSDs) in new, as well as retrofit installations. The majority of pumping applications need to be controlled. It is… Read more

Mar 26, 2016 | Energy Efficiency