RAI wind farm project chooses touchscreen technology

Graphic operator interface terminals from QSI have been chosen by Relay Application Innovation Inc. (RAI) for a wind farm electric power protection and integration Project. RAI provides electric power system protection and is based in Pullman, WA.

Qterm-G75 touchscreen terminals display information about the electrical grid interconnection of the wind farm. RAI provides the engineering expertise to put together the protection and integration system. The system uses Qterm-G75 (model GB272) and programming cable to display information from Schweitzer Engineering Laboratories Inc. (SEL) products. SEL products are designed into the system and programmed by RAI to protect the electrical interconnection and provide data for local and remote operators.

“QSI’s Qterm-G75 human machine interface (HMI) allows a local operator to see real-time data about the interconnection without having to walk near the 34,500 V switchgear that may require putting on arc-flash resistant clothing,” explains Larry Gross, president of RAI. “Using QSI’s Qlarity object-based programming language, RAI programs the Qterm-G75 to provide a graphical interface for the real-time data as well as a sequential event recorder for reviewing automatic operations after they occur.”

The ability to use pre-defined objects, edit existing objects, and author objects adds flexibility to the system. Qlarity Foundry, QSI’s PC-based design tool, provides a Microsoft Windows environment for screen creation, application simulation, and debugging.

— Renee Robbins , editorial director, Control Engineering

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