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Zoubi... Controlsguy had a good point! Attached is a copy of what I produced in 1972! Regards, Phil

John6688 Welcome to Control.com 1) Reur question: Do you mean Ex mb? 2) What country is the equipment in? Regards, Phil Corso

Zoubi.. Breakers don't have to be same amperage! Regards, Phil Corso

Zoubi... In 1973, I was called to a refinery to participate in the investigation of a problem similar to yours. They had finished "turnaround" on lineup of MV switchgear. It included checking contacts, cables, wiring, and connections of both 6.3-kV Power and 24-Vdc Control circuits, inside the...

Zoubi... o) Have you tried replacing the Gen 2 Brkr? Phil Corso

Zoubi... m) Can you reclose G2 Brkr after Xfmr Brkr has closed? n) In 11kV SwitchGear-Lineup is G2 Brkr next to Xfmr Brkr? Phil Corso

Zoubi... h) What were parameters and Mfg of original Transformer? i) What are parameters and Mfg of present Transfomer? k) Have you done any voltage or current graphing? l) Since problem is quite old, what have other engineers, specialists, or diagnostic persons, revealed? Phil Corso

Zoubi... When problem occurs is Gen1 and Gen2 Tie-Brkr closed or open?

Zoubi... I apologize for not responding to you. Your sketch is sparse. Please respond to my comments in Message #15, excluding those items you revealed in previous posts! Thank you. Regards, Phil Corso

mbixmac Welcome to Control.Com Your suggestion asking transformer magnitude is helpful! Some additional information is also useful: a) An SLD, or Single-Line-Diagram showing Source, Load circuitry, and Generator location. b) Is the event something new in an operating plant? Or a problem...

nikidi.control... First, your question reveals you lack education related to electricity! Why? Because one must know how to find the square-root of negative numbers? Secondly, one must know how to use the REAL part a and IMAGINARY part bi or a + bi to identify the various components of the...

riteshjohn Send the message in your language. I'm sure a member of Control.com will respond! Phil Corso

riteshjohn That, I can't help you with! Phil Corso

riteshjohn Welcome to Control.com. Your question is very general. Can you be more specific. For example: a) How it fits in with other Hydro-Electric Turbines; b) What sizes are available; c) What is its operating principle; d) Where are they located. Or do you want the name of a good reference...

JeffersonAirplane Welcome to Control.com! The source must have as many lines as the load! That is 3 for 3-ph motor. Regards, Phil Corso

Deniz Yilmaz The magazine "POWER, Vol167, No.4, April. 2023" has an article on mixing Hydrogen and Natural-Gas to fire Gas-Turbines. Paraphrasing, "Successful Tests of H2 in Natural-Gas-Fired Turbines at blending rates up to 25% hydrogen, in Germany"! Good Luck, Regards, Phil Corso

BrownPaperBag... But your question was: Flow of an incompressible fluid through a pipe, ... Regards, Phil Corso

BrownPaperBag You will find it in the "Engineering Toobox"! Regards. Phil Corso

BrownPaperBag... Your question is not clear. For example, does your term Head mean Pressure, p=F/A, for Force per Unit of Area! If so, then p must be expressed in Standard Units, better known as SI units! Similar to Hands to express the height of a horse! Secondly, you must consider at least two...

Knro... Welcome to Control.Com. I'm presuming you have a single-phase motor, to perform a Left-Right or Open-Close function! Start-Run capacitors, Open-Close Pushbuttons, End-of Travel Limit-Switches, are also included. But, you don't need Stopping-Speed Control, I need: 1) The original...