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Scope and content of Wiki EIG

General rules of electrical installation design

Connection to the MV utility distribution network

Connection to the LV utility distribution network

MV & LV architecture selection guide

LV Distribution

Protection against electric shocks

Sizing and protection of conductors

LV switchgear: functions & selection 

The basic functions of LV switchgear are described, as well as the selection rules for ensuring the protection coordination.

Protection against voltage surges in LV

The effects of lightning are described. Protective devices are proposed and implementation rules are given.

Energy Efficiency in electrical distribution

Power monitoring and control system contributes to global "energy efficiency". Such a system is of high benefice for the owner of an electrical network.

Power factor correction and harmonic filtering

This chapter explains how power factor correction is implemented in LV electrical installation. Practical examples are given.

Power harmonics management

The origin and effects of harmonics are described. Measurement and filtering methods are proposed.

Characteristics of particular sources and loads

Specific sources and loads are studied: generators, inverters, induction motors, lighting circuits, LV/LV transformers...

PhotoVoltaic (PV) installation

Residential electrical installations

The specific intallations rules applicable to residential premises and some other locations are presented.

ElectroMagnetic Compatibility (EMC)

This chapter describes the basic rules for ensuring EMC: earthing principles, cable lay-out, wiring recommendations.

new Collaborative chapter!

The place for you to add new contents and suggestions !

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new content: Wiki-EIG update according to new standards IEC 61439-1 & 2

The editions 2.0 of IEC 61439-1 (Low voltage switchgear and controlgear assemblies - General rules) & IEC 61439-2 (Power switchgear and controlgear Assemblies) have been published last August.
This is a good opportunity to come back to these two standards as this updates the first editions of 2009. This Wiki-EIG has been updated in consequence and now reflects the state-of-the art for ASSEMBLIES standards... read more

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new content: Designing a metering system

>> read it, modify it ...
>> tell what you think about it, suggest evolutions, discuss about it on the discussion page

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Useful hints:

-download the latest PDF version

New content on Ultra Rapid circuit breaker

As installed power increases, electrical distribution has to shift from a LV design to a HV design. Indeed, a high short-circuit level can be a threat to the installation and make impossible the selection of low voltage equipments (Switchboard and bus bars, circuit breaker…)

These situations can be met in the following applications:
Bus bars coupling onboard merchant vessels, off shore platform, loop networks (in industry), where the current and energy are important because of the installed power (several transformers or generators in parallel) and HV design not easy. <more>

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Electrical protection against surges

6 pages dedicated to electrical protection against surges have just been fully updated.
In addition to describing the operation of the surge arrester, the emphasis is on the method of choice and their location in the architecture of the electrical installation. Similarly the security of the facility is an essential element; coordination table between the arrester and its short circuit protection device is proposed. This is the result of extensive studies and tests in laboratories conducted by specialists which expertise is about short circuit breaking and lightning electromagnetic phenomena.

Pages:

• Overvoltage characteristics of atmospheric origin
• Principle of lightning protection
• Design of the electrical installation protection system
• Installation of Surge Protection Device
• Surge protection example
• Surge protection technical supplements