Eaton Cooper Power Series Pad-mounted Source Transfer (PST) System

Eaton's Cooper Power™ Series Pad-mounted Source Transfer (PST) system, equipped with iST control, is a compact, outdoor, self-contained solution designed for critical medium-voltage loads. It is ideal for facilities such as healthcare centers, data centers, broadcast studios, and production facilities that demand highly dependable power for continuous, optimum operation.

The PST system with iST control provides automatic transfer between preferred and alternate power sources, along with fault protection for critical loads. This design helps reduce outages by minimizing the time required to return to normal power. The iST controls offer a comprehensive suite of features, including source transfer and restoration configurations, overcurrent protection, metering, and SCADA capabilities.

Image Description: A Cooper Power Series PST system installed outdoors. The system is housed in a grey metal enclosure, positioned near a building entrance marked with an "EMERGENCY" sign.

Fast Source Transfer

The PST system delivers immediate action, completing multiple functions in six cycles or less, including:

• Automatic transfer between the primary source and an alternate utility source, with preferred source selection.
• Automatic transfer between the primary source and backup generation, with the capability to start up and shut down a backup generator.

Save Time, Money, and Space

• Integrated Design: Features integrated protection, transfer, system metering, event diagnostics, communications, and a customized logic engine (Idea Workbench™). This simplifies installation by reducing the number of required boxes and interfaces.
• Reduced Footprint: Offers a reduced footprint and profile, up to 89%, compared to alternative medium-voltage source transfer methods.
• Cost-Effective: Provides a cost-effective, self-contained package.
• Outdoor Installation: Designed for installation in harsh outdoor environments.
• Generator Control: Eliminates the need for additional relays typically required to start up or shut down a generator system.

Single, Integrated System

The PST system offers a single, integrated package to manage both overcurrent/fault protection needs and sophisticated source transfer requirements.

• Utilizes Eaton's Cooper Power Series patented stored energy CI interrupters, ensuring many years of maintenance- and trouble-free performance.
• Includes iST control with battery backup to manage all source transfer, overcurrent protection, metering, communications, and SCADA requirements.
• Internal potential transformers (PTs) monitor the health of each source and provide control power.
• Internally mounted current transformers (CTs) provide load information and overcurrent/fault protection.
• Integrated source-transfer, remote supervisory, and automation schemes are available for easy setup and plug-and-play functionality.
• The system is fully assembled from the factory, requiring no additional on-site assembly.

Flexible Source Transfer and Overcurrent Elements

The system supports flexible transfer, source health monitoring, and restoration parameters, including:

• Undervoltage
• Underfrequency
• Overfrequency
• Sync check for parallel (no-blink) restoration
• Non-parallel restoration
• Fault blocking to prevent transferring a healthy source into a downstream fault.

Automatic Restoration Mode

Normal restorations can be configured as non-parallel with an adjustable time delay, or parallel with sync check. The parallel with sync check restoration mode supervises source closing for both automatic and manual operations. The sync check function compares the characteristics of both sources. Paralleling is permitted only when all parameters are within configurable thresholds, allowing for a "blinkless" return to the preferred transfer.

Manual Restoration Mode

In manual mode, the sync check function prevents accidental paralleling of non-synchronous sources.

Easily Integrates into Distribution Automation (DA) or Grid-Tie Generation

Users can pull power monitoring information and data into the control system for smart grid operations, aiding in the evaluation of energy consumption and trends.

• Features relay metering and compact integral current and voltage sensing.
• Trending information can be recorded by the configurable Data Profiler in the relay or communicated via DNP3 or Modbus® to your SCADA or DMS system.
• Microprocessor-based overcurrent control provides advanced, flexible protection.
• An external-trip option allows fault interrupters to be tripped remotely.

Adaptable Control Fits Your Changing Needs

Sophisticated and evolving applications require customizable controls to meet special or changing requirements.

• Utilizes the easy-to-learn ProView™ application software, offering graphical programming and the ability to customize for specific applications.
• Speeds service restoration by collecting real-time data and integrating with SCADA systems and Eaton's Cooper Power Series Yukon™ Feeder Automation software.
• Includes the Idea Workbench tool for easy customization.

Communication Options

Hardwired

• Single- or multi-mode fiber optics (serial or Ethernet)
• Category 5 Ethernet
• RS-232/RS-485

Radio

• Serial and Ethernet radios

Diagrams and System Configurations

Single-Load Function with PST 6 System

Image Description: A diagram illustrating the single-load function of the PST 6 system. It shows a primary power source (labeled "Primary source," which can be a substation or generator) connected via a "PST 6 source transfer system" to a "Data center." An optional alternate source is also indicated.

Dual-Load Function with PST 9 System

Image Description: A diagram illustrating the dual-load function of the PST 9 system. It depicts a primary power source connected via a "PST 9 source transfer system" to two critical loads: an "Emergency room feed" and a "Bed tower feed" within a hospital. An optional alternate source is also shown.

The Green Solution to Increase Reliability for Critical Loads

Eaton's PST switchgear can be filled with biodegradable E200™ fluid, which is the environmentally preferred choice for PST switchgear. E200 is a clear, low-viscosity fluid possessing excellent thermal and dielectric properties across the full temperature range required for switchgear. Combined with a fire point greater than 300 °C, E200 fluid is ideally suited for switchgear applications.

Eaton's History and Support

Eaton has a long history of innovation and holds an industry-leading position in underground distribution. With over 50 years of experience, the company offers switchgear, relays, and an extensive array of underground distribution products, complemented by automation products and expertise to optimize reliability and productivity on distribution systems.

Idea Workbench

The powerful Idea Workbench development platform allows users to create custom-engineered logic for hardware control, status, communications, and front panel operation and indication. It provides the flexibility to modify analog and binary data for specific automation applications. An intuitive drag-and-drop graphical programming interface facilitates the construction of even complex algorithms.

Image Description: A screenshot of the Idea Workbench software interface, showcasing its graphical programming environment with interconnected blocks representing logic elements.

Source Transfer Solution Support

Eaton provides a single point of contact with experts available to offer comprehensive support before, during, and after installation. This includes:

• Eaton's Electrical Engineering Services & Systems (EESS), offering a full suite of services such as startup and commissioning, planned maintenance, performance monitoring, coordination studies, arc-flash studies, and turnkey projects.
• The Switchgear Support Group (SSG), dedicated to answering technical questions and providing after-sales support.

Operator Safety

• Optional visible disconnect means are available.
• Optional internal visible-break switches with viewing windows verify open circuits without removing cables and provide a means to ground cables internally. These are available on tap ways of Model 9.
• Cleer™ visible break is available on source ways.
• Optional externally mounted controls allow for local settings changes without accessing the cable compartment.

PST Switchgear Ratings

Image Description: A diagram comparing the size of a PST 9 35 kV, 600 A source transfer system to a "Common alternative" system, illustrating that PST systems are up to 89% smaller.

Contact and Further Information

For product information on Eaton's Cooper Power Series, visit Eaton.com/cooperpowerseries.

Eaton Headquarters:
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com

Eaton's Power Systems Division:
2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries

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Publication No. PA285004EN / Z19892. Supersedes B285-01043. September 2017. © 2017 Eaton. All Rights Reserved. Printed in USA.