PQR
Series Model D52
Page 49
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V2.1
SURGE
(SWELL OR OVER-VOLTAGE)
A power surge is the opposite of a sag and is often
referred to as "High Line Voltage". A surge is defined as
an increase in line voltage above 128 volts (on a 115V
Line) for a half cycle or longer. Like the sag, the power
surge is often caused by large inductive loads being
applied on the same line. Power surges cause some of the
most dangerous occurrences, and their results are the most
difficult to correct.
Figure PT 6 Surge
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