Two DIGICON® Controls Upgrade Averaged One Day per Unit
2 April 2013 – HPI announced that it completed the controls upgrade of two Allison 501-KB5 gas turbine packages for an energy company in California. The existing HSDE DIGICON control unit was upgraded using the Replacement DIGICON Unit (RDU™), which is HPI’s commercially off-the-shelf (COTS) PLC controls in a plug-and-play unit. Because of the modular design and its ability to interface with the existing connectors, the power plant averaged a one-day shutdown of each turbine. The original timeline estimated 3 days for installation and 3 days for commissioning.
About the DIGICON & RDU
HPI traces its heritage to the HSDE Company which supplied the DIGICONs to Allison as the original OEM controllers. Many of HPI’s engineers worked for HSDE and were responsible for the development of the 501-KB5 control system. HPI has been supporting the repair work on the DIGICON product line since the closure of VT Controls/HSDE.
HPI’s engineers developed the RDU with the same functionality as the original HSDE controller, in terms of governing, sequencing, and remote interfaces. However, the RDU also has additional features to assist in fault finding and maintenance.