How does it perform?

The Real Time Flux Control™ is the optimal

solution for inrush reduction, it cleanly

disconnects the failing source and transfers the

critical load to a more reliable power quality

source. Figures 2 and 3 show an out of phase

emergency transfer done on a 480 volt, 600 amp

STS feeding our 225kVA PDU transformer, the two

sources were 60 degrees and 180 degrees

respectfully, and the transfer mode selected was

the recommended “DIR limited.” The outage time

was measured to be 5.50 millisecond in the first

case and 11.30 milliseconds in the second with no

inrush observed.

An intelligent method for Dynamic Inrush Restraint

•   Makes secondary switching (one PDU transformer) reliable.

•   Eliminates the need for complex inverter control schemes.

•   Maintains true independence between UPS systems (higher reliability).

•   Keeps inrush value lower than 1.2x.

•   Exceeds the ITIC and CBEMA curves standards

for critical loads, see figure 4 above.

•   Smoothly transfers the load without creating

unnecessary voltage discontinuity and

disturbances to the load.