Automatic Transfer Switches
Break before make / Open transition

(print from .pdf)

The following lists the manufacturers and model numbers that have been submitted on previous projects, reviewed by PPL EU, and accepted for use. If other manufacturers or models are proposed for use, please submit all pertinent technical information to PPL Electric Utilities for review.

Manufacturer's model number designation is subject to change by the manufacturer at their discretion.

This list will be updated as additional models / manufacturers equipment are reviewed. However, the review will be done on an as-need basis only or by specific request.

Make-before-break autotransfer switches (closed transition) can also be used. However, complete information on the equipment, connection of facilities, and installation of equipment must be submitted for review for each project.

9/2006