Eaton PDI Static Transfer Switch

Power distribution units for IT equipment

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.

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Overview Specifications Resources Support

Volt second synchronization

The PDI Static Transfer Switch transfer algorithm quickly switches power sources while minimizing voltage disruptions and preserving transformer flux balance. By rapidly firing the SCRs to establish a balance point, it ensures a faster, cleaner power transfer with minimal inrush current, regardless of load size or composition.

Compact enclosure, modular design

Modular interior design results in higher quality throughout the product line and the new 2000Amp has the smallest footprint in the industry.

Rigorous five-step quality process

The quality process begins with a vendor quality partnership, utilizing PDI-designed test equipment and procedures. It continues with functional component testing, followed by component-level tests in a simulated STS environment. Next, module-level testing is conducted, and finally, verification of the final product’s system performance.

Dual redundant display

In the event of a touchscreen display failure the PDI Static Transfer Switch can be operated via the redundant operator interface. This manual interface enables the operator to select mode of operation and source (1 or 2) enabling continuous operation and maximze uptime.

Advanced communication

The PDI Static Transfer Switch communication package boosts power reliability and availability by providing instant access to redundant power sources and enabling online maintenance of upstream equipment. It also displays real-time waveform captures on the color touchscreen and gathers power data from downstream BCMS devices.

Triple redundancy

The true system redundancy provides the ultimate in power system reliability.

The Static Transfer Switch is Seismic certified

The Static Transfer Switch (STS) has undergone rigorous testing to ensure it can withstand seismic events, continuing to provide reliable performance even in challenging conditions.

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Specifications

Technical Specifications

Ratings
Redundancy	Fail safe daul redundant display. Triple redundant logic. Dual redundant gate drivers for SCRs. (Two gate drivers for each SCR) Two output switches available.
Logic	Power or gate mode (POG). Volt second synchronization Mode (VSS) limits in-rush for 480 volt systems during: -Initial sart up, restarts and transfers. VSS soft start up, restart or transfer limits to 1.5 times in-rush up to 180 degrees out of phase, typically less than 1 time.
Security	Layered security through log on access. User log-on ID and PIN number required for STS operation. All log-ins are time and date stamped for future reference. Event/alarm memory is 2MB
Installation and maintenance	- Hot swap capability for printed circuit boards (PCB). - Bypass allows for replacement of PCB while STS is powered and connected to the load. - Hot swap capability for touch screen Graphical User Interface (GUI). - By engaging the rdundant analog control panel, the GUI may be replaced without interrupting power. - Front access onl required for I/R scans of all terminations. - SCR module is on draw-out slides for ease of service. - Logic module is on draw-out slides for ease of service and greater access for I/R scans.
Monitoring	- Fail safe dual redundant display - Redundant control panel. - All status, event and alarm logs may be viewed via web browser (STS may NOT be operated via the internet). Events will continue to record up to 10 seconds after loss of power. - Real-time capture of wave forms. - Branch circuit monitoring system (BCMS) available. - Graphic depicition of load trends. - Graphic depiction of voltage and current harmonics. - All STS stored data is captured and available at the switch. - Voice assistance for alarms and help.
Graphical user interface (GUI)	Fully functional touch screen. 10.4-inch LCD touch screen. 640 x 480 resolution. 262K color. Redundant fail safe control panel.
Communications protocol	Modus TCT/IP Modbus RTU through RS 422/485 port. SNMP. Web enabled through web browser (TCP/IP). Email alerts. NTP time setting. Alarm log download via USB.

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Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.