UPS EUROPEAN GUIDE
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…