Understanding Fixed Master Sync Control Operation; Figure 11. Powerware Fixed Master Sync Control Block Diagram For A; Powerware Hot Sync - Powerware 9315 Installation & Operation Manual

Understanding Fixed Master Sync Control Operation

The Powerware Fixed Master Sync Control maintains critical load synchronization
from an existing system (Master) to a single Powerware 9315 module system or to
a Powerware Hot Sync-Capacity System (Slave). See Figure 11 for the block
diagram of this system arrangement. This synchronization facilitates the
uninterrupted transfer of customer loads from one load bus to another by means of
downstream dual source solid state transfer switches. The automatic
synchronization action of the Powerware Sync Control panel is enabled by
pressing the LOAD SYNC ENABLE pushbutton switch on the front of the panel.
When enabled, the LOAD SYNC ENABLE pushbutton lamp illuminates.
INPUT SOURCE
BYPASS
SOURCE
Slave System
(Powerware)
TO CRITICAL LOAD
STATIC TRANSFER SWITCH

Figure 11. Powerware Fixed Master Sync Control Block Diagram for a

The Powerware Fixed Master Sync Control panel provides the synchronization
reference to the Powerware System. The Slave system uses this reference to
regulate the inverter phase relationship so that the system output maintains
synchronization with the Master system. To establish the necessary
synchronization reference, each system provides bypass and output (critical Load)
bus voltage sensing to the Powerware Fixed Master Sync Control.
18
POWERWARE
FIXED MASTER
SYNC CONTROL
SLAVE
Powerware Hot Sync---Capacity System
INPUT SOURCE
Master
System
TO CRITICAL LOAD
STATIC TRANSFER SWITCH
MASTER
Powerware 9315 Fixed Master Sync Control
164201325 Rev. A 060203
BYPASS
SOURCE