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Txture... 1) Please send data or pictures reflecting the location(s), and damage severity to equipment shown on the SLD. For example, on line-side or gen-side of 52G. As second example, Gen-side or Grnd-side of NGT ! Etc ? 2. Please indicate, with an "X" mark which of the Protective Relays...

Thibhika Please provide a simple sketch or print of your proposed cable routing between Power Source to Heater location ! Regards, Phil Corso

Txture The Reverse-Power relay (ANSI/IEC Tag '32') is generally used to protect the prime mover, especially if a gas or steam-turbine. Damage to the generator is harmful if resultant currents are unbalanced. The melted breaker components (stabs or bus ) are certainly indicative of major...

A_m_shiha: If Motor-Driven use protective relays that specifically address the issue of compressor load-sharing... one is ABB. Phil Corso

Learner: How many RTD's are there? a) If 3 or more, and output is contact-based, then I suggest 2 of 3 Voting. b) If 3 or more, but their output is frequency related, also use 2 of 3 voting. Phil Corso

Learner: 1) What type of temperature-sensitive devices are being considered? 2) How big is "big"? 3) What is maximum Temperature-Rise over ambient? Phil Corso

A_m_ shiha Are the compressors driven by a turbines, motors, or one of each? Phil Corso

Mickyeng... Why can't you reveal the name of the manufacturer of the six units in service in your plant of facility? Phil Corso

Marat812 In my experience the best code in which capacitance is covered in detail is the Australia/New Zealand code, AS/NZS60079. Regards, Phil Corso

Muhamad Adeel... Once I worked in a plant where an HRSG was referred to as "Flue-Gas-Cooler". The company was heavily fined when the country's Authorities in which it was located ruled that it was a Heat-Recovery-Steam-Generator and not a Flue-Gas-Cooler. Regards, Phil Corso

CSA... Great deduction ! Sincerely, Phil Corso

Sorry about the delay. The attached file uses a procedure called called the Superposition Theorem! Regards, Phil Corso

Thomas29... Consider:

Thomas29... Please provide detail. For example: 1) Is the Gen'r supplying a local Load-Bus? 2) Is the Gen'r supplying power to the "Grid''? Regards, Phil Corso

mickyeng... I'm aware of only one company that uses an unbalanced +DC and -DC Bus System. The unbalance improves the ability to diagnose unintentional earthing/grounding of DC Powered Control Circuit wiring and devices! The company is SEL or Schweitzer Engineering Labs! Regards, Phil Corso

CSA... Thank you for you concise clarification. Regards, Phil Corso

Mutair... I forgot to include another variable, i.e., actual speed Srpm! Regards, Phil Corso

Rizwan Siddiqui... The simple reason is to provide the bearings with pressurized lube oil, until the rotor stops! Regards, Phil Corso

Mutair... Can you provide operational V, A, P, Rhot, Tdeg above ambient, so that efficiency can be calculated? Regards, Phil Corso

MRasool... 1) What service does it provide in your facility? 2) What are the motor's nameplate parameters? 3) What are Wye-winding resistances, Rab, Rbc, Rca: a) while "Cold"; b) when "Hot"? 4) What is the Ambient temperature? 5) Have you considered a new motor's efficiency vs that of the old...