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1 POWER PROBLEMS AND SOLUTIONS
1.1    POWER PROBLEMS
1.1.1 THE CURRENT SITUATION
The increasing sophistication of Information Technology Equipment (IT) and automated industrial systems and their increased performance levels e.g. the speed of data processing, the real time interconnection of telecommunications systems, continuous and automated operation, etc. means that they are more and more vulnerable and dependent on their electrical power supply.

This electrical energy is distributed in a waveform making up a single and three phase sinusoidal system characterised by its :

• frequency,
• amplitude,
• shape (wave distortion),
• system symmetry.

Whilst at the power station feeder, the voltage wave is virtually perfect, the same cannot be said by the time it reaches the user, where several different types of disturbances can be observed :

• transients,
• sags/brownouts,
• frequency variations,
• outage – blackouts…

Electrical Safety Foundation International
The Electrical Safety Foundation International (ESFI) is dedicated exclusively to promoting electrical safety. ESFI is a 501(c)(3) organization funded by electrical manufacturers and distributors, independent testing laboratories, utilities, safety and consumer groups, and trade and labor associations.

ESFI proudly sponsors National Electrical Safety Month each May, and engages in public education campaigns throughout the year to prevent electrically related fatalities, injuries, and property damage.

ESFI has a collection of educational tools and resources that are available right at your fingertips. On our website, you will find practical information and safety tips on a wide variety of topics, from holiday safety to protecting our communities from dangerous counterfeit electrical products. These materials are available to download at no cost and can be used to help you raise awareness in your community or organization about electrical dangers in the home and the workplace.