Substation splitting and CB autoclosing for limitation of short-circuit currents

In this article, we describe method and technique of substation splitting and use of circuit breaker autoclosing that may be used for the control and limitation of the magnitude of…...

Feb 02, 2018 | Premium Content ♛

5 Main Harmonics Generators And Their Detrimental Effects On Industrial Applications

In industrial applications, the main types of equipment that generate harmonics are: static converters, arc furnaces, lighting, saturated reactors and other equipment, such as rotating machines which generate slot harmonics… Read more

Jan 31, 2018 | Energy and Power

Protecting Motor From External Network Disturbances (Unbalance, V/Hz-ratio and Re-Energizing)

Unbalance in the supply voltage is typically due to a broken phase condition somewhere in the upstream network. This may result from single-phase fuse failure or pole discrepancy of a… Read more

Jan 29, 2018 | Electric Motor

How to control and protect capacitor banks before something goes wrong

The purpose of a capacitor bank’s protective control is to remove the bank from service before any units or any of the elements that make up a capacitor unit are… Read more

Jan 24, 2018 | Energy and Power

Circuit configurations (single line diagrams) for HV and MV switchgear installations

The starting point for planning a switchgear installation is its single line diagram. This indicates the extent of the installation, such as the number of busbars and branches, and also… Read more

Jan 22, 2018 | High Voltage

Neutral Point Treatment in Three-Phase Networks (Detailed Overview and Comparison)

The main faults in power networks are the single-phase short-circuit and the short-circuit to ground. The short-circuit to ground is a conductive connection between a point in the network belonging…...

Jan 18, 2018 | Premium Content ♛

Calculation of shaded-pole motor losses and efficiency at full load in 6 steps

First, let’s say few words about shaded-pole motors, and then dive into calculation procedure. A shaded pole motor is the simplest form of a single phase motor and is very… Read more

Jan 17, 2018 | Electric Motor

What are Triplen Harmonics and where do they happen?

In order to understand network problems with triplen harmonics, first let’s have a short explanation of harmonic phase sequence and third harmonics. Power engineers have traditionally used symmetrical components to… Read more

Jan 15, 2018 | Energy and Power

Recommended Protection For Transformers

The protection that is recommended and commonly applied for transformers is summarized in the following figures. It should be noted and recognized that these are general recommendations, not strict. More… Read more

Jan 12, 2018 | Protection

What is what in outdoor HV substation? How to identify elements by shape and function?

It’s not always an easy task to explain what is what in high voltage substations. Shapes of the major elements are mostly similar through substations, but there are also combinations… Read more

Jan 10, 2018 | Power Substation