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Control.com member...
Member Information and Posts by PhilCorso
Member Name: Philip P. Corso
Topic: Engineering and workplace issues.
from the Forum department...
Grounding Current Transformers
Originally posted by gautam on 29 October, 2014 - 1:17 am
Need for grounding of secondary terminal of current transformer.
New Replies:
Gautam... Q1: The ground-terminal protects endangerment of human life if there is a...
Topic: Power generation equipment control.
from the Power generation department...
Generator and Capacitor Bank
Originally posted by fluidflow on 22 July, 2014 - 1:04 am
Totally stumped by the recent brawl over utility of capacitor bank in power generation.
New Replies:
FF... Please play particular attention to Candl_Pete's excellent post. He was able to illustrate...
FF, further to my earlier post, see the following Control.Com thread: ...
FF, problem is clearer. Following is a summary, based on information provided to date: A)...
FluidFlow... Do you want me to answer you directly, via control.com, or both? Phil...
FluidFlow... can you send me a simple Single-Line-Diagram (or hand-drawn sketch) that relates how...
Fluidflow... I apologize for having missed your post! What did you mean by "LINE LOAD"...
Topic: Power generation equipment control.
from the Protective Relaying department...
Transformer Differential Relay Protection during Open-Phase
Originally posted by Amrit Pandey on 17 October, 2014 - 4:55 pm
Transformer Differential Relay Protection during Open-Phase. Possibility of the relay to trip during line to ground fault or open conductor outside the zone of the differential scheme?
New Replies:
Amrit... Would you mind sending me a copy of your calcs? Phil...
Amrit... OK! Then to summarize, neither phase or ground-fault differential protection can...
Amit... the proposed NRC "fix" for the 'Open-Phase' phenomenon appears to consider such...
Amrit... First some general comments related to your open-phase concern: A) During normal...
Amrit... one last question; what is size of the xfmr? Regards, Phil...
Amrit, please confirm the following conditions: 1) Grid-side winding (345kV) is wye-connected,...
Topic: Power generation equipment control.
from the Forum department...
Speed of Synchronous Generator
Originally posted by Muhammad Salman on 26 February, 2010 - 4:08 pm
Why Speed of Synchronous Generator decrease with increasing speed?
New Replies:
Saudaslam... the situation you described is not that of a local generator connected to an...
Topic: Engineering and workplace issues.
from the Capacitors department...
Capacitor Fuse Blowing
Originally posted by charz on 18 October, 2014 - 2:35 am
What is the current flowing when one fuse blows in a three phase star connected capacitor bank?
New Replies:
Charz, Is the mid-point of the star-conected capacitors grounded/earthed? Regards, Phil...
Topic: Motion control, servos, steppers, etc.
from the Electrical & Systems department...
Over-speeding of Slave Motor in Rock Conveying System
Originally posted by Ravindra K Maheshwari on 28 September, 2014 - 6:16 am
Rock coveyor is being driven by Master and slave, two motors in load sharing mode. Slave motor is over-speeding when master gets higher loads.
New Replies:
Is there the possibility that despite the use of VFDs, the motors are locking up at full voltage? ...
Topic: Power generation equipment control.
from the DCS control department...
DCS Control of Power Plants
Originally posted by George on 8 October, 2014 - 10:24 pm
Scope of DCS programming in a Power Plant
New Replies:
The original definition was "Distributed Control System! Phil...
Topic: Application Questions and Problems
from the Right way to do this? department...
Pump Running Indication on Control Circuit
Originally posted by Stumped on 10 October, 2014 - 4:19 pm
How can I properly wire my pump panel to show that when the pump is actually running I get an indicator on my PLC/HMI.
New Replies:
Roy, Wasn't something like this involved in the 3-Mile Island catastrophe? Phil....
Topic: Power generation equipment control.
from the Forum department...
Reverse Power Problems
Originally posted by Martin Crummy on 8 October, 2014 - 3:08 pm
Reverse power of Engine 1 when syncing in MSB bus-tie
New Replies:
Martin Crummy, I suggest you detemine what voltages sources are connected to the...
Topic: Power generation equipment control.
from the Forum department...
Auto-Synchronizing GE Frame 7EA
Originally posted by Bill on 3 October, 2014 - 12:04 am
What is auto-synch frequency window for GE Frame 7EA
New Replies:
Bill... How does auto-sync compare to doing it manually? Regards, Phil Corso ...
Topic: Power generation equipment control.
from the Simulation department...
Automatic Volage Regulation
Originally posted by Dave on 6 August, 2013 - 1:25 pm
Question on the behavior of AVR after synchronization.
New Replies:
Engr... Reur 29-May-14 post,"Can u explain please what happen in reality?" Are you...
Topic: Power generation equipment control.
from the Mechanical department...
Initial Torque Required for Gas Turbine
Originally posted by Izhar on 2 September, 2014 - 5:21 am
How to calculate the initial torque required by gas turbine
New Replies:
CSA... "At this point, the person observing the starting motor current should also be asked...
Topic: Power generation equipment control.
from the Wish i paid more attention at University department...
Power Factor on LV/HV Sides of a Transformer
Originally posted by CB on 10 September, 2014 - 10:46 am
how to analyse the power factor of a system across a transformer
New Replies:
CB... yes, the primary-side PF will change, but not because of phase-shift. Instead, the change...
Originally posted by RLovell on 29 August, 2014 - 1:08 pm
My high school students ask when/how/if abstract topics like polynomials, factoring, rational functions are ever actually used in the Real World. I don't know..maybe you do?
New Replies:
Thanks you FluidFlow, I finally reached 80! Clearly it feels like two 40's. I'm still active...
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,...
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...
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