Hi every body,
My question is related more to designers than maintenance staff. But I want to share this with every body, may be somebody can help depending on his field experience.
We have GE gas turbines Frame 9E controlled by mark IV control system. The over-speed protection is provided by 3 speed pick-ups and mechanical over speed bolt. In the last period, this bolt is causing many problems and tripping for the units. We are requested by our managers to bypass (cancel) this bolt and provide a new set of speed sensors as a redundant protection.
But we don't want to make any modification in Mark IV software. So a separate panel and sensors should be provided to achieve this function with 2oo3 logic. The output then can be connected in series with emergency push button or any other way.
Any way, I don't want to guide your mind in some direction, if any body has any suggestion or idea, please tell me.
Thanks and regards.
My question is related more to designers than maintenance staff. But I want to share this with every body, may be somebody can help depending on his field experience.
We have GE gas turbines Frame 9E controlled by mark IV control system. The over-speed protection is provided by 3 speed pick-ups and mechanical over speed bolt. In the last period, this bolt is causing many problems and tripping for the units. We are requested by our managers to bypass (cancel) this bolt and provide a new set of speed sensors as a redundant protection.
But we don't want to make any modification in Mark IV software. So a separate panel and sensors should be provided to achieve this function with 2oo3 logic. The output then can be connected in series with emergency push button or any other way.
Any way, I don't want to guide your mind in some direction, if any body has any suggestion or idea, please tell me.
Thanks and regards.