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Curious_One... Sorry you feel that way. But, if ever need help I'll be there for you! Furthermore, I heartily thank you for your Military service! Phil

bilal.bhatti... I won't keep you in suspense. The key to the puzzle is found in message 33, Item 4: The Trevini Gearbox. The Input to Output Speed Ratio (dropping decimals) is 4:1, not 1:4 ! Furthermore, Gearbox Math, involving just 2 gears, 1 input the other output, dictates that Torque-Ratio...

bilal.bhatti... I no longer require answers to earlier questions 5), 6), and 7)! But, I do need one more piece to solve the puzzle: In message 1, you said there were 9 coupling failures since commissioning 3 years ago! Please provide the 26-MW and 16-MW motor parameters for the 1st, and 2nd...

Gentlemen: Here is my Resume !

bilal.bhatti... I'm very pleased that you responded to my questions. Before, it was very difficult for me to read the original data: 5) Response #3: Gen'r No. 3 is listed as 12-MW, but photo shows 15-MW? 6) Response #4: I asked for data on the Trevini Speed-Reducing Gearboxes, but, instead it's...

bilal.bhatti My last word (On Ash-Wednesday) on the subject: The problem of Generator Coupling destruction is related to: a) A very high Turbine-Input torque, attested to by the Power Plant Manager! And, b) My calculation revealing the Generator's over-excited, and operating as if connected to...

bilal.bhatti Can you at least reveal the Temperature-rise over ambient during the 2022, and 2023 runs? Regards, Phil Corso

bilal.bhatti Please provide me with some additional info: 1) The 26MW-Gen'r: PDF of its nameplate; and is its exciter brushless or slip-ring! 2) The 16MW-Gen'r: ditto! 3) The 12MW-Gen'r: ditto! 4: The Trevini Gearbox: HP or Torque, and Input/Output RPM Ratio Regards, Phil Corso

Gentlemen... I apologize! I made a grave error assuming you did not have an "Agreement Between Buyer and Manufacturer" related to operating-Pf higher than nameplate-Pf ! ! ! Sincerely, Phil Corso

bilal.bhatti... Following is what I believe is the Cause of the Problem... 1) Think of a Weight-Lifter trying to throw a heavy weight over a bar 3 meters above his head. He's successful. But then he tries when the bar is 1 cm higher... he fails. The 26-MW machine problem is similar. It reached...

bilal.bhatti... I interpret the solid-line as 2 copper cables/phase, each 400 mm^2 in area, 70 mt in length! Am I correct? I interpret the dotted-line as 1 Aluminum cable/phase, 500 mm^2, in area, also 70 mt in length! Am I correct? Hopefully a last cable question: How are the cables installed...

RikusV... You've had the problem some 7 years since installation, even for single-genset operation! As the first-step toward solution I suggest you monitor kW, Voltage, Amperes, and PF for all 3-phases of each genset and load. One (or more) of the Voltage and Current Instrument Transformers may...

RikusV... Wel;come to Control.com! Q1) What are Gen'r parameters such such as kW kVA, V, A, Pf, Hz, Rpm? Q2) Eng'n parameters such Diesel or Gasolene? Q3) Also, are they same Mfg, and age? Q4, Are problem(s) related to a single Genset, or two or all three? Regards, Phil Corso

RikusV... I suggest you start a new forum for your topic! If you need help to do so contact the Control.Com Moderator "David 2" by E-mail! Regards, Phil

bilal.bhatti Q1) While I can see the connection between 2,000A Breaker CP-8A and 2,000A Breaker CP-88, I don't see any indication of current-carrying-capacity, such Amperes or "MCM", nor the length of cable(s) in meters or feet! So, is the cable capable of carrying 2,000 Amperes? Q2) I will...

bilal.bhatti... I still need answers to the 3 questions asked in Message # 5. Regards, Phil Corso

WTF... No, I didn't go "dark" on bilal.bhatti study. Waiting for info. Nor did I go "dark" on JSMHarish's project! I'm waiting for his response to my uncovering an error on the "Fault Chart". Didn't you catch it? Regards, Phil

bilal.bhatti... Thank you for info. My approach will be based on determining Torque-Values for 3-conditions, for the 2-Gen'r case, namely: a) Pre-Disturbance; b) During-Disturbance; and c) Post-Disturbance, for the 2-Gen case ! The 3-Gen Case will also be evaluated! Three more questions: 1)...

JSMHaresh... Phone number is 561-289-7688 in Boca Raton Florida. Phil Corso

bilal.bhatti 1. Do you have a trending chart showing kW, kV, Amps, and Pf for the two paralleled machines, especially when the "disturbance" occurred? 2. Were the coupling failures always associated with the larger machine? 3. Since the failures have stopped can you provide kW, kV, Amps, and Pf...