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Greg... presuming the machine is based on US standards, then: 1) Typically a 12-lead generator has 6-windings (or stator coils!) And each coil has 2 termination Tags, i.e., 1-4, 2-5, 3-6, 7-10, 8-11, 9-12! 2) Only one Wye-connection can result in a 4-wire, 480Y/277V output! But it only has...

Edmound... start with search of Control.Com Archives for: http://www.control.com/thread/1026213301 http://www.control.com/thread/1240161181 Regards, Phil Corso

Manoj... sorry, but my contribution demonstrated how very small frequency changes affect the kW component of the connected load! To determine GT efficiency, measured in heat-rate, i.e., kW per unit of fuel used, requires testing! The test method I'm thinking of is similar to that for...

Miller... by now you should have ploted the h(t) equation! Note that the time-function meets the 'Stable' criterion, that is, the impulse-response decays to a steady-state value after a period of time! The 'pole' sits on the negative-real axis, and its value is equal to the exponent of...

Miller... Plot it! Phil

Miller... try the Inverse using The Partial Fraction Method! Phil

Miller... responding to your specific query... it is stable! What response to you get when you plot the time-related function? Regards, Phil Corso

Electrical... are you asking for general information, or are you experiencing a problem with a specific machine? Regards, Phil Corso

Shaheed... do you need additional information on how the turbine can be damaged even though steam-flow is zero! Phil

JFB... the typical setting for a steam-turbine is about 3-5% of the rated kW of the turbine! For a non-condensing machine it's somewhat higher when operating against atmospheric or higher exhaust pressure! However, in my experience development of the Trip-setting and Time-delay is usually...

Dan... Roy makes a good point! Can you provide a description of the tank heaters? For example: 1) Does each tank have a single-heater, rated 12.3kW @ 480V, or 3 heaters, each rated 4.1kW @ 480V? 2) If there are three heaters per tank, then are they Wye or Delta-Connected? 3) Are loads...

Shaheed... the generator was operating as a Synchronous Motor turning the turbine grid-frequency. Actually the generator operates like a Synchronous Condenser, that is, Low kW, but probably pre-disturbance kVAr! During the disturbance, that is, until the Rev-Pwr relay operated, the...

Joe... can you provide addtional detail on the shielded cable installation: 1) Which end of the shield is grounded? 2) Are you sure about the integrity of the "Ground" path? 3) Do you know the duration of transient? 2) What is the nominal-current or Hp of the motor believed to be...

Thanks to the person who noted my error, thus expressed Thumbs-Down! The correct increase should have been 1.002^3! Phil Corso

Manoj... the technically correct answer is, “It depends on the load-characteristic!” a) If frequency increases and the load is mostly inductive, i.e., blowers, fans, compressor, pumps, and the like, then power will increase due to the "Affinity Law!" b) The Law states that power for the...

Shaheed... The primary purpose of the Rev-Pwr relay is to protect the Steam Turbine, not the Generator! The generator will continue to supply the same kVAr component of line-current to the utility! However, its magnitude will be insufficient to operate any Over-Current relays! But, the...

OldCajun... you might want to repost your question under a more appropriate heading such as "Wind-Power Using Induction Generator! <b>Moderator's note:<i> I will make this its own thread and change the title if the originator of this thread asks.</i></b> In the interim you will find...

Mrinal... the following patent may be what you seek: http://www.faqs.org/patents/app/20130042624#ixzz2nwayPFeh Regards, Phil Corso

Maryam... as a start you may find the following thread helpful: http://control.com/thread/1026244600 After viewing the post, try searching the Control.Com Archieve Regards, Phil Corso

Karthick... when Woodward first used our Smart-A-Larm modules in conjunction with their Over-Speed Detector, the delay was intentionaly set for 100ms! Since the system is 2of3, the actual delay should be the time interval between detection of the the 1st detector and the 2nd detector plus...