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Control.com member...
Member Information and Posts by PhilCorso
Member Name: Philip P. Corso
Topic: Power generation equipment control.
from the Forum department...
Different modes of AVR operation
Originally posted by ASHISH on 20 April, 2012 - 1:11 pm
Brush AVR A-30 different modes of operation?
New Replies:
Engr, Was the answer adequate, or not, for your purposes? Phil...
Sorry, CSA... The poster provided enough information for the study, except for alternator...
Sorry, CSA... it's all your getting. I must admit, however, that we are somewhat equal... I...
CSA... so is it your position that the solution to Engr's query boils down to application of...
CSA... considering your admitted disdain for academia, I thought you might accept a university...
CSA... I believe you will agree that if load MW is constant so is fuel-rate. Paraphrasing the...
CSA... I take it then, you won't object to my using formlae? Regards, Phil Corso...
Eng... the simple reply to your query is : If one ignores losses, then neither lag nor lead MVAr...
Topic: Power generation equipment control.
from the Electrical department...
Generator protection - Rotor earth fault
Originally posted by Hameed on 7 June, 2014 - 5:06 am
Why does Rotor earth fault protection have two stages
New Replies:
Hameed... are you applying a specific Brand-Name Protective Relay? Regards, Phil Corso...
Topic: Continuous process industries, DCS questions.
from the Nuts department...
Cable tray separation
Originally posted by jasoin carroll on 4 June, 2014 - 1:11 pm
Is there a standard that says the highest voltage cable should go in the top or the bottom tray?
New Replies:
Jasoin... The ANSI/IEEE-Std supports your contention regarding Vertical Segregation of Data...
Jasoin... I suggest you procure: ANSI/IEEE Std 422-1986 "Guide for the Design and...
Topic: Power generation equipment control.
from the Transformer Design department...
Transformer Secondary Voltage Ratings
Originally posted by Amrit on 1 June, 2014 - 6:56 pm
Questions about transformer secondary voltage ratings
New Replies:
Amrit... i) If load varies +)/(-) 10%, then RMS-load calcultaion, involving duration of...
Originally posted by Balasubramanian on 1 June, 2014 - 5:18 am
How to convert the Turbine shaft vibration in micrometer to mm/s conversion?
New Replies:
JFB... Differentiation. Phil...
JFB... thank you for pointing out my error, i.e., failing to note micron measurement was...
Balsubramanian... mm/s = μm / 1,000 Regards, Phil Corso...
Topic: Power generation equipment control.
from the Reliability department...
Failed 15 kV Vacuum Circuit Breaker
Originally posted by Broner on 21 May, 2014 - 3:08 am
Failure of a 15 kV POWL-VAC circuit breaker protecting the GSU transformer
New Replies:
Ronald... I also want to alert you to another phenomenon that could result in low-magnitude...
Ronald... I believe your 'incident' was the classic arcing-ground fault! Such faults produce...
Broner... one last question: 11) I presume that all amp readings you provided are based on...
Ronald... You said the neutral was solidly-grounded, but I believe you were referring to the...
Ronald... if you prefer you can Off-Forum at: cepsicon@aol.com Furthermore, if you agree,...
Ronald... 7) What was the minimum current and time-setting of any of the current-sensing relays,...
Ronald... 5) What prompted the operator to trip the CB manually? Had he/she noted smoke, arcing...
Broner... thanks for info. Now can you provide some detail: 1) Which Protective device cleared...
Broner... it is apparent that only one of the three phases has faulted. Can you describe how the...
Topic: Power generation equipment control.
from the Electrical Power Engineering department...
Power System Control & Stability
Originally posted by Asif Ferdoush on 22 May, 2014 - 1:31 pm
What happens when power system is subjected to any kind of disturbance?
New Replies:
Asif... repeating an earlier Caveat, "I don't accept anonymous requests for information;...
Asif... since Bruce's Referenced Document also uses the SB Griscom Model, contact me for a copy! ...
Bruce... if you want the Westinghouse T&D version contact me at: Cepsicon@aol.com Phil....
Bruce... The Mechanical Analogy you alluded to was devised by Prof S.B. Griscom in 1926. A...
Topic: Power generation equipment control.
from the Power Generation department...
Turbine Generator and Step-up Tansformer Size
Originally posted by adel on 22 May, 2014 - 7:21 am
what is the impact of power factor on the size of GT and Step-up transformer
New Replies:
Adel... A transformer's required rating is always given in MVA, never in MW. Also, Power Factor is...
Adel... I've interpreted your query as two-fold: 1) Why is the Point-of-Delivery (PoD) on the...
Topic: Engineering and workplace issues.
from the Forum department...
Why are electrical systems grounded?
Originally posted by Fluoronator on 21 May, 2014 - 7:03 pm
My google search has only yielded superficial answers. What is the real reason?
New Replies:
Fluoronator... 1) Are the receptacles mounted in/on the truck powered by only the on-board...
Topic: Power generation equipment control.
from the maintenance department...
transformer oil corrosivity
Originally posted by paru on 12 May, 2014 - 5:50 am
Why the transformer oil DBDS and CCD test are showing different results?
New Replies:
Paru... do you know the sequence of tests? 1) Were the DBSD and CCD tests taken at the same? ...
Paru... did both firms reach the same result, i.e., copper corrosion confirmed with DBDS test,...
Paru... you probably know that high oil or winding temperature is a precursor to evidence of...
Paru... were the tests performed by the same testing firm, or were they performed by your own...
Topic: Power generation equipment control.
from the Forum department...
Diesel Sets vs Gas Reciprocating Engines
Originally posted by scientif on 16 May, 2014 - 4:38 am
Number of sets (diesel or gas engines) to start a load.
New Replies:
Scientif... to begin discussion: 1) Does "Island Operation" mean only combustion-EG's...
Topic: Power generation equipment control.
from the Power Plant Coordinator department...
Excitation limit operating Alarm
Originally posted by Fathi Hadloul on 9 May, 2014 - 10:25 am
Excitation limit operating alarm and performance load test
New Replies:
Fathi Hadloul... what are comparable measurements for both machines? Specifically: MVA; MW;...
Topic: Power generation equipment control.
from the Power Control department...
Why Synchronize to a Dead Bus?
Originally posted by SSU on 6 May, 2014 - 9:56 am
What is a Dead Bus and why Synchronize to it?
New Replies:
SSU... the following thread may shed some light on the reason for pre-charging an OHV line: ...
Topic: Engineering and workplace issues.
from the Electrical department...
Negative phase sequence
Originally posted by Shahed on 3 May, 2014 - 7:33 am
Alternator Negative sequence volt are showing 100% while positive sequence volt are showing 0%.
New Replies:
Shaheed... if you are able to synchronize, then both the power connections and PT connections...
Shaheed... repeating... was the Generator connected to and providing power to 3-phase load at...
Shaheed... start with CT exchange first. Reur your observation that the '46' relay displayed...
Shaheed... can you provide additional detail? 1) Neg-Seq relays are typically connected only to...
Shaheed… reur observation that Neg-Seq relay displayed 100%... with generator under some load,...
Topic: Power generation equipment control.
from the Control department...
SynGas Conversion Project
Originally posted by Abhishek on 17 April, 2014 - 5:20 am
Pointers for Syngas Conversion project in India
New Replies:
Abhishek... would you mind sending me a copy? Phil Corso [ cepsicon@aol.com ] ...
Topic: The Business of Automation and Control
from the Investors department...
New Flow Measurement Method
Originally posted by Abdolazim Hasseli on 9 April, 2014 - 1:09 am
How to find an investor of instruments.
New Replies:
Abdolazim Hasseli... presumably you are providing the Video without legal advice? Phil Corso...
Originally posted by Danish on 29 April, 2014 - 4:43 pm
220 KV transmission line safe distance from the Gas vent tower.
New Replies:
Danish... OSHA, The Occupational Safety and Health Standards have the restrictions you seek. ...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Comparing steam flow and feedwater flow
Originally posted by MattQ on 27 April, 2014 - 2:33 pm
Looking to find out how a comparison of feedwater flow and steam flow is made.
New Replies:
It was a lot easier during the 'G'olden years when all we had to do was add a capacitor to the...
Topic: Power generation equipment control.
from the Electrical Engineering department...
Under frequency protection of Generator connected to infinity bus
Originally posted by Santanu on 25 April, 2014 - 2:06 am
Why are there under frequency or over-frequency protection trip in Generator connected to infinity bus?
New Replies:
Sanantu... typically off-normal frequency tripping protects auxiliary plant apparatus during...
Topic: Power generation equipment control.
from the Electrical Engineering department...
Distance Protection
Originally posted by Santanu on 25 April, 2014 - 2:09 am
What is the principle of operation of Distance Protection?
New Replies:
Sanantu... what Protective-Relaying texts or reference books are available to you? Regards,...
Topic: Engineering and workplace issues.
from the electrical engineering department...
% impedance of power transformer
Originally posted by ramesh on 5 August, 2008 - 1:12 am
Elaborate on % impedance of power transformer.
New Replies:
KS... do you mean the short-circuit level on the 6.6kV level increased from 40 to 63kA? ...
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