UFC 3 -520-01
June 10, 2002
Table 12-2. Power Quality Summary
Sags and Swells
Remote system faults
Energy storage devices
System fault clearing
Loss of generation
The following sub sections provide additional information regarding different
possible equipment types and design solutions.
12-5.5.1 Surge Protectors. Surge protectors are not normally considered a solution
for power quality problems; their principal purpose is to protect against surge transients.
Refer to Chapter 11 for surge protection criteria.
12-5.5.2 Filter Reactors.
12-22.214.171.124 Reactors can be a cost -effective solution in an existing facility where rewiring
is difficult or costly. Reactors provide a filtering function by blocking offending harmonic
12-126.96.36.199 Reactors are rated in terms of percent impedance. Higher impedance
reactors provide greater filtering, but also increase the voltage drop. For example, a 3
percent impedance reactor will introduce a 3 percent voltage drop across it under rated
conditions. Evaluate the effect of the additional voltage drop as part of any filter