scope:

Foreword

(This Foreword is not a part of IEEE C37.98-1987, IEEE Standard Seismic Testing of Relays.)

This standard is for developing data related to the seismic capabilities of relays. This standard complements IEEE Std 344-1987, IEEE Recommended Practice for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations, which provides general guidelines for developing data related to seismic qualification of equipment used in nuclear generating plants.

Data must be developed by testing rather than analytical means since protective relays fall into the category of complex devices as described in Section 5 of IEEE Std 344-1987; however, analysis may be used in data reduction, reconciling response spectra, justifying methods of evaluating changes, and justifying seismic qualifications of relays of similar construction.

It should be emphasized that while a primary purpose in preparing this standard was to cover the application of relays to nuclear generating plants, the standard is not restricted to this application. This standard may be applied to any area in which the seismic response of relays is a design consideration.

This standard was prepared by Working Group K1, Seismic Relay Performance, of Subcommittee K, Relaying Practices of the Power System Relaying Committee.

Scope

This standard specifies the procedures to be used in the seismic testing of relays used in power system facilities. The standard is concerned with the determination of the seismic fragility level of relays and also gives recommendations for proof testing.