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Control.com member...
Member Information and Posts by PhilCorso
Member Name: Philip P. Corso
Originally posted by speedtronic on 19 December, 2008 - 10:04 am
What is the concept of Impedance protection for synchronous Generator(turbo/hydro)?
New Replies:
Sajad... are you referring to under-excited operation as related to Impedance-Protection? ...
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... what type of conversion process is involved? For example is it: a) Coal to Syngas? ...
Topic: Power generation equipment control.
from the Forum department...
Windmill Alternator
Originally posted by Karsten Rasmussen on 11 April, 2014 - 3:04 pm
Control of windmill alternator load
New Replies:
Karsten Rasmussen... following are two ways to change speed: o control blade-pitch. o control...
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:
Actually you don't want the Patent too soon. What you want is a Patent-Pending, because once...
Abdolazim Hasseli... first get a reliable Patent Attorney! Do Not, repeat,...
Topic: Engineering and workplace issues.
from the Engineering department...
Deriving RMS from Vibration Transmiter
Originally posted by shakarami on 6 April, 2014 - 10:03 am
How we can drive the rms vibration from Peak
New Replies:
Shakarami... the reason I suggested that you first derive wave-shape is because there are...
Shakarami... to determine the RMS value of any signal you must extract its wave-shape for one...
Only if if the single is sinusoidal! Phil...
Topic: Power generation equipment control.
from the Forum department...
Disco Switch inq
Originally posted by jmcquarrie on 4 April, 2014 - 9:42 am
A bit outside my scope (and for this forum) on a fuseable disconnect switch.
New Replies:
jmcquarrie... there is someting unusual about your observations or I have misinterpreted your...
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:
AT... would you prefer the RoT formula, ignoring impact of X/R ratio and exciting-current, on...
AT... Additional to my previous post: 5) " %X = . . . . . = 10.9503 " (NO!) Your...
AT... Several comments about your thesis: 1) "When I did the calculation => I(L)=800kVA...
AT... OK! Let's start with basics: A) Given: kVA(L) = 800; PF(L) = 0.8; kV(L) =0.48; Xfmr's %...
AT... I hope you don't mind my asking the following just to be sure about your query: 1) A...
Topic: Motion control, servos, steppers, etc.
from the Forum department...
ac drive failures
Originally posted by gray wolf on 18 March, 2014 - 7:18 pm
multible drive failures
New Replies:
Gray Wolf... What has AB said? Regards, Phil...
Topic: Power generation equipment control.
from the Electrical department...
Fault level ISc
Originally posted by Shaheed on 17 March, 2014 - 2:01 am
I was selecting a main incomer VCB for a turbo generator TG of 16000KW. I proposed VCB of 31.5KA but an expert calculated fault level total 23.62KA and advised to select VCB of 25KA.
New Replies:
Shaheed... further to my post on grounding. Ground-Fault level has little to do with 3-phase...
Shaheed... Expert's calc'n shows the Grid contribution as 14.4kA! Which of the Swgr cubicles...
Shaheed... correction to earlier post: The busbar, its joints, insulators, and bus-stubs, must...
Shaheed... regarding you ground-fault concerns; what are the parameters of the selected NGT or...
Shaheed... your size-calc of the GTG's VCB Isc is based on your presumption that the Gen's...
Shaheed... one question; What is Rated Short-Circuit Interrupting and Closing-Duty of the...
Shaheed... to start: 1) 'Expert' is correct about using Xd" for calculating CB's...
Topic: Engineering and workplace issues.
from the Modeling 3-winding xfo on EasyPower department...
3 winding transfromer model
Originally posted by Lespoils on 19 March, 2014 - 10:20 am
Need help finding R1 X1 R0 X0 from Z=X% and need help finding Zst on a 3-winding xfo.
New Replies:
Lespoils... if there is the possibility you can get secondary and tertiary loads about equal,...
Lespoils... stop hitting you head against a brick wall! You said it yourself... "Maybe I'm...
Originally posted by Jack on 18 March, 2014 - 8:46 pm
Ground Fault Current Path for Multiple Sources
New Replies:
Jack… the Drawing you submitted is a generalized illustration of a 3-ph, 4-wire, LV (< 1,000V)...
Topic: Engineering and workplace issues.
from the Forum department...
Solar Cells breaker panel
Originally posted by ahmed shahat on 13 March, 2014 - 10:40 am
the control components of breaker panel
New Replies:
Ahmed Shahat… there are essentially two-types of Grid-Tied systems; Utility-Size, and...
Topic: Power generation equipment control.
from the Power Generation department...
Starting of large Induction Motor on Gas Turbine Generator
Originally posted by Arjun Sharma on 26 February, 2014 - 9:56 pm
Starting of the biggest Induction motor on Gas Turbine would trip the complex because of an instantaneous overloading is the concern. The voltage drop may also cause the tripping of downstreams. So, suggestions are required regarding the same.
New Replies:
Arjun Sharma... as a rule of thumb, if the Generator is a least twice the capacity of the...
Arjun... can you provide additional data: 1) Was the UV-relay measuring the 11kV, 33kV, or 6.6kV...
Arjun Sharma... to start the investigation into your problem: 1) Has the motor ever been started...
Topic: Engineering and workplace issues.
from the Forum department...
Power Factor Correction Panel
Originally posted by Sensorless on 11 March, 2014 - 12:28 pm
How to decide the Kvar required in a power factor correction panel to improve the power factor of 25 Kva load.
New Replies:
Sensorless... further to my earlier post, search Control.Com Achives for Power-Factor,...
Sensorless… your statement that kVAr is "negligible" is in error. The figures you cite...
Topic: Power generation equipment control.
from the Forum department...
Over current problems
Originally posted by donnapa14 on 5 March, 2014 - 9:26 pm
Timed neutral overcuurent
New Replies:
Don... thanks for the SLD. The three line-current CTs are wye-connected, and the 51N is responding...
Donnapa14... mine is Cepsicon [@] aol [.] com Phil...
Donnapa14... since your setup now consists of paralleled generators the situation becomes more...
Donnapa14... typically, a 4160V, 3-ph, 3-wire, system does not have a Neutral conductor. Thus, the...
Donnapa14... when you say neutral overcurrent are you referring to the connection from...
Topic: Engineering and workplace issues.
from the Forum department...
AC/DC Ratings
Originally posted by engineer on 9 March, 2014 - 8:04 am
AC/DC rating of switchgear
New Replies:
Engineer... although their "thermal" rating may be equal, i.e., Trms = Tdc, their...
Topic: Engineering and workplace issues.
from the Forum department...
power capacitor placement
Originally posted by engineer on 8 March, 2014 - 1:08 am
power capacitor placement for a circuit
New Replies:
Engineer... Power Factor Correction (PFC) equipment location, in descending order of...
Topic: Engineering and workplace issues.
from the electrical department...
votage drop
Originally posted by duke on 8 March, 2014 - 6:36 am
What voltage drop occurs in following case?
New Replies:
Duke... this subject is quite popular on this forum. I suggest you search Control.Com Archives for...
Topic: Power generation equipment control.
from the Steam Cooling department...
Steam turbine cooling
Originally posted by Rathore on 6 March, 2014 - 11:50 am
Steam also works as cooling media in steam turbine? How can that be?
New Replies:
Rathore... you can find several threads on this topic in Control.Com Archives. But, the one that...
Topic: Power generation equipment control.
from the Belt Driven Generator department...
Off the grid generator problem
Originally posted by who knows on 5 March, 2014 - 1:22 am
need help with generator problem for off the grid
New Replies:
WhoKnows... how about some data: 1) Generator nameplate data? 2) Cap size and type? 3) Has...
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
Fast operating Solenoid Valve
Originally posted by Muni on 28 February, 2014 - 11:52 pm
Fast operating solenoid valve with on time less 0.2 sec
New Replies:
Muni... to give you my idea of a Fast-Valve app, following is one approach you might want to...
Muni... my earlier post neglected to ask you to define "On-Time" duration? Phil...
Muni... if it's an electrical solenoid the desired On-tme" of 0.2 second (armature-travel)...
Topic: Engineering and workplace issues.
from the rOperations department...
Cause of High Neutral Current
Originally posted by Solo on 1 February, 2010 - 11:52 am
Cause of High transformer neutral current
New Replies:
Persie... the current values you listed yield an Ampere-Unbalance-Factor, AUF, of 3.7% if you...
Topic: Engineering and workplace issues.
from the Forum department...
Maintenance Program for Transformer
Originally posted by Jim on 21 February, 2014 - 8:08 pm
Preventive maintenance program for transformer on a production line
New Replies:
Jim... 1) Is daily load heavy-industrial, or light-maufacturing? 2) What is load in kW, and...
Topic: Engineering and workplace issues.
from the Electrical department...
Sami conductor layer on cables
Originally posted by Shaheed ul Islam on 21 February, 2014 - 8:37 am
Sami conductor layer/ tape on HT 6.3KV or 11KV cable and HT generator winding coils.
New Replies:
Shaheed... see Control.com Thread: http://www.control.com/thread/1026216510 Regards, Phil...
Topic: Power generation equipment control.
from the Photo-voltaic Cells department...
automated load tap changers
Originally posted by souvik ghosh on 18 February, 2014 - 5:30 pm
The operation of automated load tap changers based on the input from inverters in a solar power plant.
New Replies:
Souvik Ghosh... following are answers to your questions: (1a) Typically Grid-connected...
Originally posted by jeet on 18 February, 2014 - 8:06 am
Field current and field voltage get decreased while increasing power factor
New Replies:
Jeet... it will be easier to explain if you would provide what the corresponding armature-currents...
Topic: Power generation equipment control.
from the Synchronizing Class department...
Cause of reverse power
Originally posted by blackstoneboy on 15 January, 2009 - 8:33 am
Cause of reverse power.
New Replies:
Jaypot... testing requires knowledge of the relay used. Is it analog, solid-state or...
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