Recent content by Haroon

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    Frequent Communication failure of all Bently Nevada Vibration system 3500 with MarkVIe HMI’s

    We are experiencing frequent communication failure between MarkVie control system and Bently Nevada 3500 series vibration monitoring system installed at 04 units. Under mentioned are observed: No Vibration data available on HMI asscociated screens. (ref. attached screenshot) Turbine...
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    Frame-III (MS-3002) gas turbine high seismic vibration at Brg#4 casing (LP shaft)

    Thanks for your reply. Inadvertently missed to mention earlier regarding seismic transducer and its loop. Please note that we already checked loop and simulate transducer loop from site to control room with Vibration Shaker and verified indication, alarms limits, which is appropriate.
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    Nozzle Control Principle

    CSA, Appreciate if you provide a detail on variable Nozzle control, its all control/operating parameters during control in connection with GE speedtronic MK-II control system. Best wishes,
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    Frame-III (MS-3002) gas turbine high seismic vibration at Brg#4 casing (LP shaft)

    We have GE twin shaft gas turbine (MS3002) with second stage variable nozzles and equipped with Speedtronic MK-II control system. GT under went HGPI (hot gas path inspection) on Nov, 2018 and right after aforesaid maintenance, its LP shaft radial vibration and Brg#4 side casing seismic increased...
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    Product life cycle and obsolescence year

    I was searching to get information for under mentioned equipments Product life cycle and obsolescence year details. If anyone can help, how and where can I get that and if someone have the same for reference, please. 1. GE Speedtronic Mark-II control System. 2. BHGE Bentley Nevada 7200. 3...
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    Mark 2 Control Startup Issue

    We have speedtronic control for frame-1 GT control. Recently Gas Turbine was stopped for overhauling and after maintenance activities unit was started. however it is continuously tripping during startup at 82% HP speed as soon as 14HS signal appears. At the Same time PCD FAILURE ALARM also...
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    Calculating Flow Measurement with Orifice

    Actually i have gone through with AGA, but I found it some what complicated. What I need from this forum is to share some simple AGA calculations, formulas. Is there any simple calculation method which privide actual flow in simple steps.
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    Calculating Flow Measurement with Orifice

    At our Gas compressor facility, we used to calculate final Flow throughput of the station with Orifice Metering System. On discharge line there is an Orifice plate to create Differential Pressure (DP) along with flow transmitter to transmit corresponding DP signal, a static pressure transmitters...
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    Turbine Low Speed Shaft (LP) Could Not Cut In

    Thanks for your response. First, there is not any process or diagnostic alarm prior to LP shaft Locked alarm and unit trips. 2nd, how can we observe whether LP shaft actually rotating during start?, because we are just relying on LP speed pickups, which is showing zero speed till 55% of HP...
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    Turbine Low Speed Shaft (LP) Could Not Cut In

    We have Two shaft frame3 Gas Turbine installed at our plant commissioned in 1985 whose control system was upgraded in 2014 to MARKVIe by GE. Turbine is loaded with Seimens two Compressors through a gear box. Recently GT overhauled inhouse and successfully maintenance carried away. After...
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    How to Factory Reset MarkVie UCSA Controller

    We have problem with MARKVIe UCSA controller installed in simplex control panel. Can any one share how to factory reset UCSA controller, as i there isnt any hardwired reset button or toggle switch in controller.
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    20HD Energization in MKVIe

    Thanks and I really appreciate your responses. I want to share you that we have 03 nos. MKVIe control panel and we always experienced that 20HD energized by forcing L4_XTP and l20hd1x signals, this was first time we faced such problem that said procedure did not worked. (surely due to...
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    20HD Energization in MKVIe

    Thanks for your remarks. That's true we have Simplex Control system with R/S controller, single PTUR and Three PPRO I/O packs. (That's about our system) Further there is not any process or other trip signal available also machine ready to start appeared when all checks normalized. While...
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    20HD Energization in MKVIe

    Thanks Dear CSA; That is absolutely the correct procedure as you mentioned by forcing two signals (l20hd1x and L4_XTP), still 20HD could not energized. It seems that signal are properly changing but 125VDc voltages not appeared on Solenoid and hence no voltage on terminals of solenoid. I...
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    20HD Energization in MKVIe

    Dear CSA We have newly upgrade our frame-III gas turbine control panel from MK-II to MKVIe. We used to simulate Servo valve calibration and function checking when required on MK-II. Hydraulic/control oil solenoid dump valve (20HD) need to be energized for above activity. How we can energized...
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