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 | Energy and Power

The essentials of electric shock protection, earthing systems and RCDs

Protection of persons and livestock against electric shock is a fundamental principle in the design of electrical installations in accordance with BS 7671: Requirements for Electrical Installations, commonly known as… Read more

Aug 21, 2017 | Protection

9 power generating units grouped by prime mover you should know about

Many types of power generating plants are in use and possible for the future, including steam plants fueled by coal, oil, or gas, nuclear plants, hydro plants and plants which… Read more

Aug 18, 2017 | Energy Generation

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 | Energy and Power

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 | Energy and Power

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 | Energy and Power

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 | Energy and Power

Practical advices for positioning of circuit breakers inside LV switchboard

Mounting of the different mechanical and electrical components (enclosures, busbars, functional units – circuit breakers, etc.) which constitute the LV switchboard defined by the original manufacturer must be carried out… Read more

Aug 07, 2017 | Energy and Power

MV network diagrams for feeding secondary switchboards and MV/LV transformers

Let’s take a look at the main MV network diagrams and structures used to feed secondary switchboards and MV/LV transformers. The complexity of the diagrams differs, depending on the level… Read more

Aug 04, 2017 | Energy and Power

How to install a manual transfer switch for a backup system in 16 steps

A manual transfer switch is installed next to the main service panel to override the normal electrical service with power from a backup generator during a power outage. Manual transfer… Read more

Aug 02, 2017 | Energy and Power

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