IEEE 28:1972

Revision Standard - Superseded.
The issuance of this document to supersede IEEE Std 28-1967 (ANSI C62.1-1967) revises many
portions of the standard and adds two significant design tests, namely, switching-surge sparkover
characteristic tests for station and intermediate arresters rated 60 kV and above, and radio influence
voltage (RIV) and internal-ionization-voltage tests.

This standard applies to surge-protective devices designed for repeated limiting of voltage surges on 50- or 60-Hz power circuits by passing surge discharge current and subsequently automatically interrupting the flow of follow current. This standard applies to devices for separate mounting and to those supplied integrally with other equipment