The PDI TFA Static Transfer Switch maximises the availability and reliability of power for mission-critical loads through the automatic seamless transfer from two independent power inputs in an innovative true front-access enclosure.

Available in sizes ranging from 250A – 1,200A, the PDI TFA Static Transfer Switch maximises the availability and reliability of power for mission-critical loads through the automatic seamless transfer from two independent power inputs in an innovative true front-access enclosure.

Known for its patented transfer algorithms, the PDI TFA STS is unmatched in its 2 million hour mean time between failure (MTBF), dual redundant operator interfaces, flash memory firmware updates and hot-swappable control logic components. The true front-access enclosure allows for installation, service, maintenance and IR scanning from the front of the unit – a first in the industry.

The PDI TFA STS is adaptable for primary (480V) and secondary (208V) topologies by using a common power and control pass through the PDI STS and PDU enclosures simplifying installation. The PDI STS also monitors power quality of both sources including real-time waveform capture and monitoring of downstream sub-feed and panelboard breakers through the 10.4” touchscreen display. Compartmentalised power, SCR, controls and communication compartments decrease the risk of arc flash and increase worker safety. Adaptable top/bottom entry/exit for power and communications (BMS/DCIM) enables flexible deployment in a wide variety of mission-critical facilities.

PDI TFA STS redefines performance and reliability, and its innovative approach to installation and service ultimately achieves the lowest total cost of ownership for your mission-critical facility.