Eaton PDI TFA Static Transfer Switch
True front access enclosure

Overview:

The PDI TFA Static Transfer Switch maximizes 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 – 1200A, the PDI TFA Static Transfer Switch maximizes 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 it's 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 utilizing a common power and controls pass through on 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. Compartmentalized power, SCR, controls and communications 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, reliability and its innovative approach to installation and service ultimately achieves the lowest total cost of ownership for your mission critical facility.

Compartmentalized true front access enclosure

Power semiconductors, molded case switches, controls, fans and operator interfaces are compartmentalized into separate areas of the true front access enclosure. This allows installation, maintenance, service and IR scanning to be completed from the front of the enclosure, minimizing square footage requirements, decreasing contractor installation time and increasing worker safety during maintenence.

Adaptable service entrances

Because every data center is different, determining service entrances for input/output power connections and communications for building management systems (BMS) can vary from site to site as well as unit to unit. The WaveStar TFA Static Transfer Switch was engineered to be both top/bottom entry/exit for the ultimate in flexibility. The WaveStar TFA Static Transfer Switch can also be ordered where source and output bus is oriented and located for top or bottom preference shortening conductors saving time and money.

Line-and-match with our PowerPak 2 and PowerHub 2 power distribution units (PDUs)

A universal and integrated front access cable path allows independent customization of both the PDU and STS to provide a system of power switching and distribution unique to each client or facility.

Triple redundancy

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

Dual redundant operator interfaces

In the event of a touchscreen display failure, the WaveStar STS can be operated via the Redundant Operator Interface (ROI). The ROI enables the operator to select mode of operation and source (1 or 2) enabling continuous operation, maximizing uptime and when combined with triple redundancy provides an industry leading calculated 2 million hour Mean Time Between Failure (MTBF).

Rigorous five-step quality process

1. Vendor quality partnership using Eaton-designed test equipment and procedures
2. Functional component testing
3. Component level tests in simulated STS environment
4. Module level test
5. Verification of final product system performance

Volt second synchronization (VSS) algorithm

The WaveStar VSS transfer algorithm switches power sources quickly within CBEMA limits without connecting the two sources, all while minimizing voltage disruptions and preserving transformer flux balance. This is achieved by rapidly firing the power semiconductors to establish a balance point as quickly as possible by analyzing the voltage disruption and volt-second balance. The result is an automatic clean transfer of power 1/2 to ≤3/4 cycle with in-rush current typically ≤ 1X unit rating regardless of make up and size of the load. Manual transfers are ≤1/8 cycle for in-phase conditions.

Power or gate (POG) algorithm

The WaveStar POG transfer algorithm transfers the load to the alternate source as quickly as possible with automatic transfer times ≤1/4 cycle (including sense time) and ≤1/8 cycle for normal in-phase conditions.

Communications package

The WaveStar communication package enhances the overall reliability and availability of power to your facility by:

• Providing instantaneous access to redundant sources of power
• Enabling online maintenance of upstream equipment
• Showing real-time wave form captures on the color touchscreen
• Gathering power data from downstream BCMS devices (PDU, RPP).