IEEE C62.44-2016 PDF
This guide encompasses the application of surge protective devices (SPDs) (secondary arresters) from the secondary terminals of the distribution transformer to the line side of the service equipment.
The purpose of this guide is to address many of the aspects to be considered when applying surge protective devices between the secondary terminals of the distribution transformer and the line side of the service equipment.
New IEEE Standard – Active. This guide encompasses the application of surge protective devices (secondary arresters) from the secondary terminals of the distribution transformer to the line side of the service equipment.