How not to overspecify high voltage CTs and VTs

The installations wherein CTs and VTs are mounted to measure the normal and abnormal values of current and voltage, have many variations in key system parameters, including voltage class, insulation… Read more

Feb 18, 2019 | Power Substation

Inspection and maintenance of capacitor banks (recommended practices)

Capacitor banks generally require very little maintenance because they are static type of equipment, but don’t be fooled by this statement. Capacitors are well known for their dangerous reaction when… Read more

Feb 13, 2019 | High Voltage

Where to start with design of electrical installation?

The power analysis must be always the at the very top of your tasks in design of an electrical installation. It will enable the source(s) to be sized according to… Read more

Feb 11, 2019 | Energy and Power

Connections and working principles of three-phase distribution transformers

A three-phase service can be supplied by one three-phase transformer unit or by interconnecting three single-phase transformer units. One three-phase unit is smaller than an equivalent size bank consisting of…...

PREMIUM Membership Required

This content is available for Premium members only. Premium membership gives you an access to specialized technical articles and other extra premium content (electrical guides and software). Premium Membership ♛

Feb 08, 2019 | Premium Content ♛

6 steps for specifying IEC 61850 & substation automation requirements

It is not easy to read the IEC 61850 documents or to comprehend how the pieces all work together. When implementing systems as complex and as new as substation automation,… Read more

Feb 06, 2019 | Power Substation

5 ingredients that make SCADA operation delicious

To explain in very simple words, I would say that SCADA is a bunch of equipment that provides an operator at a remote location with sufficient information to determine the… Read more

Feb 04, 2019 | Industrial Automation

People response to short-term exposure to electric fields of AC transmission lines

Short-term exposures to electric fields produced by AC transmission lines and stations can be pretty serious and may be classified according to the type of effect causing a sensation in… Read more

Jan 30, 2019 | Safety

Protection of a transformer directly connected to a transmission line without switchgear

A transformer-feeder include a transformer directly connected to a transmission line circuit without the intermediation of a HV switchgear. The saving in HV switchgear so achieved is unfortunately lowered by… Read more

Jan 28, 2019 | Protection

How to determine power transformer impedance for calculation of short-circuit currents

In order to calculate short-circuit currents, it is obligatory to know conductor-specific equivalent data and impedances of electrical operational equipment, which are usually given by the respective manufacturer. The calculation…...

PREMIUM Membership Required

This content is available for Premium members only. Premium membership gives you an access to specialized technical articles and other extra premium content (electrical guides and software). Premium Membership ♛

Jan 25, 2019 | Electrical Lectures ♛

Six MV/HV applications of series capacitors for improving the power quality

Series capacitors are connected in series in the circuit and therefore carry the full transmission line current. The series capacitor is actually a negative reactance in series with a transmission… Read more

Jan 23, 2019 | Power Quality