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PDI Primary and Secondary Redundant Systems

Using custom WaveStar® PowerPak PDUs you can create automatically switched primary and secondary systems in conjunction with WaveStar® Static Transfer Switches, or manually switched primary and secondary systems using interlocked circuit breakers.

Primary PDU Automatic or Manual System
In a automatically switched primary system, a WaveStar® STS with redundant inputs (typically 480V or 600V with other voltages available) feeds a WaveStar® PowerPak PDU, typically with 120/208V outputs.
 
In a manually switched primary system, the STS is replaced by interlocked circuit breakers.
 
Secondary PDU Automatic or Manual System
In a automatically switched secondary system, two PowerPak PDUs feed a WaveStar® Static Transfer Switch.  PDU inputs are typically 480V or 600V (other input voltages also available) with 208V outputs to the STS.
 
In a manually switched primary system, the STS is replaced by interlocked circuit breakers.
 
In both secondary systems, the main feeds to panelboards on both PDUs are fed by either the STS output or the output of the interlocked circuit breakers.
 
See these links for additional information on redundant system components:

PowerPak 50-300 kVA
WaveStar STS: 3-pole 150-1600A, 4-pole 150-800A