BENTLY 133292-01 DCS/PLC CONTROLLER IN STOCK

AVR contacted Istec because the three overspeed protection cards of their Bently Nevada ODS failed simultaneously. This caused downtime of the process as the steam turbine could not be started up, leaving the generator unpowered.

Initial examination of the application by Istec indicated that the eddy current speed sensors seemed to be working properly. However, the supply voltage showed abnormal values. After checking the log of the Bently Nevada system an error message was found on the 24V power supply, 5V power lines, and 12V power lines. As a result, the output signals were disrupted, causing the overspeed protection cards and zero-speed card to fail.