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nayan.sharif, What does the System Description section of the Operation/Maintenance Manuals provided with the turbine say about the purpose of the valve? It will most likely be in the L.O. System tab, but may be in the Cooling & Sealing Air System tab. If you can post a copy of the P&ID to...

sdbarman, One more thing, the terminal boards on the TRPG, TPRO, TTUR and TREG are all removable. (There are two screws at each end of a 12 terminal section; loosen the screws and the top portion of the terminal board can be pulled off (with some effort) with the field wiring attached.) It...

sdbarman, There is, or should be, a "description" of what constitutes a composite trip in the Mark VI System Guide, GEH-6421. I think you will find it in the section on the VPRO and TREG cards. I have heard that newer Mark VI System Guides have a new volume (II or III ???) that lists all the...

Markthesecond, Thanks for directly answering the question! I was under the presumption that if iqbal had read the post that it was clear the droop setpoint didn't change as load changed, that the droop setpoint is multiplied by the error between the speed reference and the actual speed to...

Gary H. Smith, Without being able to see the hydraulic system/line-up instruction drawings for the turbine it's very difficult to recommend a possible cause, but if the valve is hydraulically-actuated against spring pressure then it would seem that something is causing a loss of hydraulic...

iqbal, Droop is not a field-adjustable or tuning parameter. Most utilities and grid regulators <b>REQUIRE</b> droop to be maintained at a particular value because that's how they can attempt to calculate how the grid will respond to disturbances. Because droop speed control is so widely...

iqbal, Droop speed control has been written about ad nauseum many times on control.com (which sometimes seem like it's "Droop Speed control.com"!). Try this thread http://www.control.com/thread/1261632503#1263000994

Mambo, Many thanks for the information--and congratulation for resolving the issue! I'm sure the Customer is extremely happy. That was quite a large change in heat content, and if the Customer is going to be experiencing changes in heat rate over time, it might be good to look into a...

Black, I wouldn't think of second-guessing the Belfort Bunch. It was only my interpretation of the notation FO on the drawing that led me to believe it was a fail-open valve, which may also be incorrect. Most dual-fuel machines these days are designed to be primarily operated on natural...

Black, The valve appears to be a fail-open, air-operated control valve that is used to limit the air flow to the Main Atomizing Air Compressor (the Accessory Gear-driven Atomizing Air Compressor). Before GE took over the Belfort, FR, manufacturing/engineering facility and gave them carte...

saeed, While the power/reactive power numbers might not add up to a 0.9 pf, a 0.9 pf does, indeed, mean that only 90% of the energy being produced is going into "real", useful work (watts, KW, MW) and 10% is going into reactive power. Now, reactive power is necessary, but unless you are...

davidmcc, Failures to fire on liquid fuel can be very difficult to troubleshoot (but NOT impossible)--especially if the unit is primarily operated on natural gas. Sparking ignitors are not necessarily generating enough spark to ignite liquid fuel, which must be properly atomized (pressure...

TSURESH, Since you put this question in the Power Generation community, I'm going to presume you are referring to a protective relay on a generator set. Low <b>forward</b> power relay is quite often used to describe what is more commonly referred to as 'reverse power' relay. The primary...

Dear syed_hassan08, What have you done to troubleshoot the problem, and what were the results of your troubleshooting? Have you looked at the Pre-Vote Data Display as suggested? If so, what did you observe? If not, why not? Have you tried changing any cards or cables? If so, what were...

DRP, The Mark VIe should have been powered down in an orderly fashion by opening the circuit breakers and switches to the various components (<R>, <S>, <T> and the SPROs (<X>, <Y> and <Z>). And then the power to the "Mark VIe" could have been isolated from the main power supply breaker as was...

Sukhdev Singh, The likely cause is either dirty filters in the hydraulic ratchet system, or dirty oil and problems with the hydraulic ratchet self-sequencer mechanism. Either can cause the plunger for 33HR to operate prematurely as you have described. The first is relatively easy to solve...

yoga, You are going to have to refer to the documentation provided with the equipment at your site for information about calibration procedures. You may find some useful documents at the Woodward Governor website. Hydraulic actuators are very commonly used--and for the most trouble-free...

TOral, Can you please post the bulletin/document number? Thank you.

NA, > 1) prime mover torque suddenly shut down/increased/decreased Since a generator is a device for converting torque to amperes, the power output (amperes) will decrease suddenly/increase suddenly/decrease. > 2) load is suddenly disconnected/short cktd For the case where load is...

Hi, A torque converter is usually required because the starting means has to spin at a higher speed to develop the torque required to break the turbine-generator shaft away from zero speed and to accelerate the shaft during starting. The choice of starting means should be strictly made on...