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Control.com topic...
Engineering
Originally posted by Phantush on 21 October, 2014 - 3:28 pm
Convert RMS voltage to Analog signal + Per Unit
New Replies:
You need a signal conditioner module to produce a useable signal for PLC (4-20mA) and to isolate...
The sine wave input is to be read in from a PLC....
If I'm reading you right you want to measure the Peak Voltage. Use a diode and capacitor to...
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
Instrument Control Loop
Originally posted by Waqar Ahmed on 26 June, 2014 - 3:18 am
Maintenance procedure of process control loop.
New Replies:
As posted by dave, something must have changed. Besides hardware (valve) problems, there could be 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:
FluidFlow... can you send me a simple Single-Line-Diagram (or hand-drawn sketch) that relates how...
Hello Phil, The problem or dilemma is still persisting. Senior Manager is telling that...
Fluidflow... I apologize for having missed your post! What did you mean by "LINE LOAD"...
Topic: Sensor technologies.
from the Forum department...
Flow Measurement Using Load Cells
Posted by Juan Pardo on 24 October, 2014 - 5:20 pm
Measuring the flow coming out of a vessel using only a load cell to control a valve.
Originally posted by Rich on 21 October, 2014 - 3:28 pm
Looking for feedback on flow meters and flow computers from Flow Technology Inc
New Replies:
Also...while looking at outputs, if intrinsically safe operation is an issue, you should look for...
If it operates as just a flow meter and totalizer, presumably it operates unattended. Someone just...
Topic: Engineering and workplace issues.
from the eng department...
Standard Recipes Designation ID
Posted by Gustavo Borda on 22 October, 2014 - 4:28 pm
Is there any rule to designate a process recipes (IDs)?
Topic: Engineering and workplace issues.
from the Automation List department...
Why is current transformer secondary short circuited?
Originally posted by Anonymous on 6 June, 2007 - 11:47 pm
Why is current transformer secondary short circuited during the operation?
New Replies:
why voltage not high when we short the C.T secondary side? Pls explain with principle....
Topic: Engineering and workplace issues.
from the Instrumentation department...
Control Valve Fail Action
Posted by xyz on 21 October, 2014 - 6:28 pm
control valve fail action discussion
Topic: Power generation equipment control.
from the Power operation department...
High pressure turbine bypass system
Originally posted by Zouhen on 17 October, 2014 - 5:19 pm
During Turbine Low vacuum Trip what is the position of high pressure turbine bypass control valve
New Replies:
> Please JEB send to me your Email I am a guest on this forum and not sure of the rules...
Please JEB send to me your Email...
Do you have any drawings? I would think there would be more to BPV logic than just a low vacuum...
Dear Gutman thank you for your reply. the boiler is reheater boiler with hp bypass. Please...
first, I have never seen a CCP, nor a unit with multiple bypass. I have worked nukes with a single...
Dear, What type of boiler you have, reheater provided, hp bypass will provide steam to reheater...
Dears, Actually turbine hp bypass cv when Turbine low vacuum trip it will open and keep the...
Dear Zouhen In this case when Low vacuum Turbine Trip, both LP and HP pressure turbine bypass...
Topic: Engineering and workplace issues.
from the OPC to CS3000 communication department...
Reading text information from OPC to yokogawa CS3000
Originally posted by ANWESHA on 3 July, 2014 - 4:08 am
Is it possible to read text/string from OPC to CS3000 in some way?
I would like to read a Batch number which is scanned and fed to OPC and display in the graphics of CS3000.
Is that possible?
New Replies:
Hi, Thanks for all your replies. The last reply by BC* nailed it. Yes there is a historian...
Topic: Power generation equipment control.
from the Forum department...
Electrical Rotating Equipment Training
Originally posted by Ajiit on 20 October, 2014 - 1:39 pm
Where or how do I find or start training to become a technician for turbines, generators, etc.?
New Replies:
Hi Arjiit, I started my career in the UK a long time ago (around 1963). I did an Inst. Tech....
Topic: Engineering and workplace issues.
from the Instrumentation department...
Installation of Ex-ia Converters in Ex-ia Junction Box
Originally posted by giorgioCDB on 26 August, 2014 - 11:34 am
Installing Ex-ia converters in Ex-ia Junction Box instead of EX-d
New Replies:
as temperature converters are Ex-ia, they can be mounted in Ex-D JB or even weatherproof JB as it...
Topic: Engineering and workplace issues.
from the Forum department...
Customized Control System ExD Enclosure
Originally posted by Rashid on 27 August, 2014 - 12:46 am
We have procured a Customized PLC ExD Enclosure.

New Replies:
if any changes has been done in Ex-D enclosure, new holes are drilled or any components installed....
Topic: Communications systems and equipment.
from the Forum department...
RS485 to Analog Input Conversion
Posted by cherrypi on 20 October, 2014 - 3:38 am
Is it possible to convert (multiple) readings being transmitted through RS-485 communication to analog signals?
Topic: Engineering and workplace issues.
from the Instrumentation department...
Reinstallation of an Orifice Plate in a Pipeline.
Originally posted by Arafath Ali on 13 October, 2014 - 2:20 pm
How to reinstall an orifice plate in a pipeline after the information regarding the HP and LP side is lost?
New Replies:
Placing the beveled surface on the HP side definitely reduces the discharge coefficient and throws...
> LP is no angle, HP is angled. just remember where the medium is coming from. its the HP. I...
> Once the information regarding the HP and LP side of an orifice plate is lost, how to...
It is not real clear what is being asked. If it is regarding the direction that the orifice plate...
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...
Thank you CSA ...
Saudaslam, It seems I don't have the answer to your question. Perhaps another contributor to...
Saudaslam, Good, seemingly simple, question; extremely difficult to answer because it depends on...
thanks for reply, I need a little more clarification generator (275 MW at 18 kV working at...
If grid frquency decreased from 60 to 57 HZ what effect on generator active power increase or...
Topic: Engineering and workplace issues.
from the Forum department...
Orifice plate tapping -Flange or D, D/2
Originally posted by instruguy on 16 October, 2014 - 2:19 pm
Which type of orifice tapping - Flange or D, D/2 works best for larger pipes?
New Replies:
On rethink, you get higher d/p with flange taps than you do for pipe taps so the metering error...
d, I didn't ask the basic question. the reason is obvious. Sure of orifice plate as a basic...
No major advantage flange taps are the most common, but if the flanges get too costly, pipe...
Hi Do I get any advantage by using flange tap? Will accuracy has any effect? Thanks ...
It is all a function of service conditions, fluids, piping layout, and what you are trying to...
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...
Originally posted by vignesh on 12 October, 2014 - 5:34 am
How do I change my career from a gas turbine operator to a combined cycle operator?
New Replies:
Hi, Thanks Mr. George...
Topic: Power generation equipment control.
from the CONTROL emissions monitoring systems department...
Gas Turbine CEMS Operating Parameters
Originally posted by vignesh on 12 October, 2014 - 5:46 am
Operating parameters for monitoring gas emissions for gas turbine
New Replies:
Thanks to everyone....
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