PDI® Static Transfer Switch
PDI offer's a wide range of Mission Critical PDI® Static Transfer Switches (STS) which offer the following:
- Sizes from 250 Amps to 2000 Amps with 120/208 VAC to 277/480 VAC range
- Industry leading VSS low to no in-rush switching algorithm.
- True Front Access Enclosure enabling all operation, maintenance and service from front of the PDI® STS (PDI® TFA Static Transfer Switch)
- Triple Redundancy – true system redundancy provides the ultimate in power system reliability.
- Dual Redundant Operator Interfaces including a 10.4″ Touch Screen Display and Redundant Operator Interface (ROI System).
- Integrated Intelligent PDI® WaveStar® Power & Branch Circuit Monitoring
- Compartmentalized Controls and & High Voltage Enclosures
- Adaptable Service Entrances for Top/Bottom Entry/Exit (PDI® TFA Static Trasfer Switch)

PDI® TFA Static Transfer Switch
The PDI® TFA Static Transfer Switch is the only True Front Access Static Switch which enables Installation, Maintenance, Service and IR Scanning from the front of the enclosure. The innovative compartmentalized cabinet lowers total cost of ownership by simplifying installation, and making maintenance safer by reducing the potential for arc flash.

PDI® Static Transfer Switch
Over 20 years of experience has allowed PDI to become the preferred supplier of static transfer switches to mission critical industries. The PDI® Static Transfer Switch supplies critical loads with a choice between two available sources of electrical power. By continually monitoring power quality, the PDI® Static Transfer Switch automatically transfers to an alternate source within a quarter cycle and without interruption of power to even your most sensitive critical loads.