This guide addresses the selection of the (1) components@ (2) protection@ and (3) control of harmonic filters. It does not address the engineering required to establish the proper size and configuration of harmonic filters to achieve desired performance. This document provides guidelines for passive shunt harmonic filters for use on 50 Hz and 60 Hz power systems to reduce harmonic distortion on the system(s). A harmonic filter may also be referred to as a de-tuned or tuned capacitor bank where the objective is to provide reactive power compensation@ with the additional requirement that the design must also avoid excessive amplification of harmonics from the loads or existing power system background harmonics. (No specific standards exist for harmonic filters@ although standards do exist for most of the components that are used in a filter. This guide references standards where they exist and gives typical criteria where appropriate standards do not exist.)