The Structure of Electric Power Systems (Generation, Distribution and Transmission Of Energy)

From a general perspective, an electric power system is usually understood as a very large network that links power plants (large or small) to loads, by means of an electric… Read more

Oct 09, 2017 | Edvard

How to choose a form of separation for LV switchboard and how to classify them

By form of separation it is meant the type of subdivision provided within the switchboard. Separation by means of barriers or partitions (metallic or insulating) may have several functions. And… Read more

Sep 25, 2017 | Edvard

Rules for power distribution in LV switchgear and protection of branch / distributed lines

Power distribution in low voltage switchgear can be defined as supplying power to a number of physically separate and individually protected circuits from a single circuit. Depending on the circuits… Read more

Sep 20, 2017 | Edvard

Installing a submarine transmission cable, how they do it

Installing a submarine transmission cable is a costly and challenging activity. The lifetime of a submarine cable might be tens of years and the technical interventions for its repairing in… Read more

Sep 11, 2017 | Edvard

Specific capacitor installations & reactive compensation of asynchronous motors / transformers

Although in general, the calculation of the reactive power to be installed is initially carried out globally, it is advisable not to be swayed by the apparent simplicity of this… Read more

Aug 30, 2017 | Edvard

Should transfer switch be equipped with contactors or circuit breakers? Manual or automatic?

Transfer switches support multiple operation modes (manual, automatic, non-automatic, bypass isolation, etc.) and feature a range of different switching mechanisms (contactors, circuit breakers). Transfer switches are used to protect critical… Read more

Aug 23, 2017 | Edvard

5 special applications of residual current devices (RCDs)

Normally residual current devices (RCDs) are used for protection against direct and indirect contacts. An RCD can detect low leakage currents that could flow through the body of a person…. Read more

Aug 16, 2017 | Edvard

The essentials of MV/HV magnetic voltage transformers

Magnetic voltage transformers are used to provide a secondary signal that is proportional to the actual prevailing primary value. These signals are used to supply measuring instruments, meters, relays and… Read more

Aug 14, 2017 | Edvard

10 equipment you MUST recognize in every distribution substation

Distribution substation is a substation from which electric supply is distributed to the different users. In a substation there are numbers of incoming and outgoing circuits each having its isolator,… Read more

Aug 11, 2017 | Edvard

The most common methods of measuring the resistance of an earth electrode

When an earth electrode system has been designed and installed, it is usually necessary to measure and confirm the earth resistance between the electrode and “true Earth”. The most commonly… Read more

Aug 09, 2017 | Edvard