Introduction; Figure 1. Powerware Fixed Master Sync Control - Powerware 9315 Installation & Operation Manual

The Powerware Fixed Master Sync Control maintains the syncronization of the
Powerware system's critical load outputs to a fixed master souce. The master
source can be a third party UPS, utility or another Powerware system. This
facilitates the uninterrupted transfer of the load from one load bus to another by
means of downstream dual source solid state transfer switches. Without the load
sync option, the possibility exists for the two system output (critical load) buses to
become out of phase with each other. This condition occurs if suitable bypass
sources are not available, or if the bypass sources feeding each system are not in
sync with each other. An example of this condition would be if the two systems are
supplied by separate diesel generator sets, or if the bypass sources for the two
systems are lost. Figure 1 shows the front view of the Sync Control.
Powerware 9315 Fixed Master Sync Control
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Introduction

Figure 1. Powerware Fixed Master Sync Control

1