Three ABB (Stal-Laval) GT35 Gas Turbine Control Retrofits for Emarat

HPI completed the controls retrofit for three ABB (Stal-Laval) GT35 gas turbine compressor sets for Emarat Gas Operations in the UAE. The control and instrumentation system was a fuel governor and sequence controller through an ASEA system. HPI replaced it with a Rockwell GuardLogix® PLC and FLEX I/O™ to meet the SIL 3 rating requirements of the customer.

With its extensive knowledge of the requirements for controlling a variety of gas turbines, HPI was able to reduce the initial design phase and facilitate easy commissioning of the completed system. Since HPI’s control software and hardware have been tested and proven reliable, the HPI system was the most cost-effective and technically responsible solution for the customer.

All field design and installation was done by Loops Automation with commissioning supervision by HPI. The existing control cabinet was removed and a new panel supplied. All new relays, terminals, fuses, etc. were mounted on subpanels at the rear and sides of the new panel. The gas turbine interface panel was removed and replaced by a touchscreen HMI. The digital I/O was incorporated within the new FLEX I/O system. A GuardLogix controller isn’t just a safety controller, it’s a standard Allen-Bradley ControlLogix™ processor with safety modules that ensure SIL 3 rating requirements are met.