Siemens DTU3005-B Spezifikationen PDF herunterladen (Seite 20)

Power Disturbance Types There are three types of power disturbances. Type I

disturbances are transient and oscillatory overvoltages lasting

up to 0.5 Hz. Type I disturbances can be caused by lightning or

switching of large loads on the power distribution system. Type

II disturbances are overvoltages and undervoltages which last

from 0.5 to 120 Hz. Type II disturbances can be caused by a fault

on the power distribution system, large load changes, or

malfunctions at the utility. Type III disturbances are outages

lasting greater than 120 hertz.

Studies have shown that sensitive computer equipment is most

vulnerable during a Type I overvoltage disturbance and a Type II

undervoltage disturbance. Type II undervoltage disturbances are

the most common cause of failure in sensitive computer

equipment. It is important to note that the precise extent to

which computers and other sensitive equipment is susceptible

is difficult to determine.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 87 88

Keine Kommentare

Siemens DTU3005-B Spezifikationen Seite 20