IEEE C62.37.1

Description / Abstract: This application guide applies to thyristor surge protective components (SPCs) used in systems with voltages up to 1000 V rms or 1200 V dc. These components are designed to limit overvoltages and divert surge currents by limiting the voltage and switching to a low-impedance state. Although telecommunication circuits are the main application of thyristor SPCs, this guide will also provide useful information for other protection applications. This guide is intended to complement and be used in conjunction with IEEE Std C62.37™-1996.¹

Purpose

This guide is intended to provide assistance in selecting the most appropriate type of thyristor SPC for use in a surge protective device (SPD), equipment, or system application. IEEE Std C62.37-1996 defines thyristor SPC parameters and their measurement. This guide explains the basic functions, component structures, surge environment, comparative thyristor technologies, and how parameters are interpreted and selected for example applications.

¹ Information on references can be found in Clause 2.