T 4.6 Voltage fluctuations / overvoltage / undervoltage

Fluctuations in the supply voltage can result in malfunctions and damage to the IT systems. Such fluctuations range from extremely short and minor incidents which have little or no effect on the IT systems to total failures or destructive overvoltages. The fluctuations can originate in any part of the electrical supply system, from the electrical power network of the power company to the power circuit to which the corresponding devices are connected.

Overvoltages can also be induced outside the electric power supply system on all other electrically conductive networks (e.g. telephone connections, building services management systems, water or gas pipes, etc.).