from the power department...earth current with Shield current of a 63Kv line
problem with Shield current of a 63Kv line (single core)
By Phil Corso on 2 August, 2012 - 4:50 pm -
Masoud... 12) Is the ratio of Line-current to Shield-current always the same? Phil...
By masoud on 2 August, 2012 - 12:26 am -
> My first question is how did you measure it? the current was measured by a clamp ammeter...
By bob peterson on 1 August, 2012 - 5:23 pm -
My first question is how did you measure it? It seems likely that this much current on a shield...
from the serious department...ModbusRTU Master Over TCP/IP Interface in Java
I'm developing a ModbusRTU Master Over TCP/IP Interface to read a ModbusRTU electricity meters data. the meters are working over RS485 network.
You can try xMasterSlave for Modbus protocol at www.tgscada.com. It is a completely freeware....
from the Forum department...Wonderware logger alarm group errors
Added new alarm group in WW Error in logger.
from the too formal department...kva & hp
maximum hp motor for dol starting with given kva transformer
By Phil Corso on 24 July, 2012 - 4:49 pm -
Engineer... I committed three (3) 'OOPs' (the most feared word in an operating-room): OOPs 1) I...
By Phil Corso on 24 July, 2012 - 3:37 pm -
Engineer... since the V-Drop experienced by the motor is proportional to the load carried by the...
dear phil corso and william hinton, thanks the basic idea i started out with is, the maximum hp...
William... I meant NEMA Locked-Rotor Code. Phil...
William... I would be very interested in the motor's kVA/Hp ratio? Regards, Phil...
By William Hinton on 21 July, 2012 - 11:04 am -
As you did not specify a transformer type, voltage class, kVA or hp, I will give you an example: ...
from the Automation List department...Unity vs. Concept
What is difference between Unity and Concept programming?
By teboho on 23 July, 2012 - 8:16 am -
> Unity is new era at Schneider, you can use Premium and Quantum Families as well, but not...
from the Engineering department...Airfield Lighting Circuit
Airfield lighting circuit connections
By John Correa T on 22 July, 2012 - 10:39 pm -
Lamps in the series circuit must be controlled in certain bright settings. This is done through...
HV... they are series-connected to provide consistent lighting patterns. Series lighting insures...
from the INSTRUMENTATION department...Difference between 316H and 316L material
what is difference between 316H and 316L SS material? we are using 316L ss material impulse lines for Low pressure instruments and 316H SS material impulse line for high pressure impulse lines.
By d- on 20 July, 2012 - 8:26 am -
the -H, -L refer to carbon content only ...
from the High level control software department...High level control platforms (WinPC server based) that can do PID and MPC?
I am looking for a "best of breed" PC-based High Level/Advanced Control software platform that combines:
1) Basic and advanced PID function blocks
2) MPC capability
1) Basic and advanced PID function blocks
2) MPC capability
from the Testing Department department...underfrequency test for Micom P643
This is just a query for other procedures for under-frequency relay time test.
William... see Eng-Tips, Thread # 238-307149, for a similar question on the MICOm P643! Regards,...
from the Forum department...Valve Controller & Positioner
Difference between A valve positioner and controller
By Sam on 17 July, 2012 - 8:48 am -
The way it works is that you will have say a pressure transmitter in the field somewhere measuring...
from the commissioning department...electrostatic treater interfce level control
We have a Ktek Capacitance type level transmitter to measure the interface and it is part of a LIC and LCV. We have checked the calibration and it is ok. In a current normal operation crude is flowing along with the water on the water line.
By Sam on 17 July, 2012 - 7:37 am -
We have had similar problems and we have finally come to the conclusion that the only proper I/F...
from the Automation List department...What makes a generator increase load
What makes a generator coupled to a gas turbine increase load when load raise command is issued to Mark V
The question is not clear, and the abbreviations are unclear, as well. I'm pretty sure 'GG'...
Could you define Mload and GG...
By John on 13 July, 2012 - 2:08 am -
Hi. Who knows the Dynamic relation between Mload and output power of LP turbine? How are they...
from the Control system department...NAMUR - Maximum distance
NAMUR - Maximum distance and signal amplifier
from the Plant Engineering department...DCS Control bus network
Probability of Redundant ring network for DCS systems to be explored in view of chances control failure if go with Tree/Mesh/star topology.
By Mohamed on 15 July, 2012 - 4:11 am -
Thank you Mr. Dick Caro, For the update....
By Dick Caro on 12 July, 2012 - 11:43 am -
Actually, one of the very early DCS from Leeds and Northrop, the MAX 1, used a dual path...
from the EE department...120/208V or 277/480V.... huh?
what does it mean when something is rated 120/208V or 277/480V? What do the two numbers mean?
By Powah on 13 July, 2012 - 1:50 pm -
> Only have 125 coming from one wire in electrical panel. Other wire is dead. > Tried to...
from the Power Generation department...Drum Level transmitter
Can you tell me the basic concept for drum level mesurement.
By K V S Viswanatha Ram on 10 July, 2012 - 3:41 am -
> u always talk about steam getting condensed inside the condensate pot. why not the other way?...
from the Temperature department...RTD temperature measurement
connection of RTD chip to tube.
There are commercially available thermally conductive epoxies (google will find them) Although I...
from the mesurement and control department...Thermocouples.
extension leads of Thermocouples.
The whole point of using thermocouple extension wire is to bring the "cold" junction back...
By d- on 8 July, 2012 - 9:33 am -
Type K extension cables are not equivalent to Type K t/c wires, but is much cheaper. The use of the...
Just to clarify, a Type K thermocouple does NOT use copper wire as extension cable. Even a Type...
By Steve Myres on 7 July, 2012 - 10:19 am -
It's to avoid creating another junction of dissimilar metals and distorting the temperature...
from the Automation List department...HIMA ELOP II v 3.5 application
Failed to start ELOP II application in Windows XP environment.
By vahid on 8 July, 2012 - 3:52 am -
We have Elop II in windows 2000 sp4. Some times program closed suddenly and before that this error...
from the Forum department...Fire detection suppression system
plc based CO2 Flooding system based on addressable Smoke/Fire and Break glass
By Mark on 7 July, 2012 - 11:35 am -
Hello, http://www.firebussystems.com/ This company supports several PLCs. Good luck, ...
from the Forum department...Elau B-1 display for Illig Machine
help installing program for Elau B-1 display
By ebrahimi on 6 July, 2012 - 7:17 am -
I have Elau display for Illig machine. I have problem in data transmission. in some pages it...
from the CONTROL department...Alarm: Trip mult. activ. too long or too often
What is the cause of the Alarm Trip mult. activ. too long or too often?
By bob peterson on 5 July, 2012 - 10:26 am -
There are a fair number of tech notes that AB has hidden away too. It seems like some of them the...
from the Forum department...What application and equipment are most common to use LVDT sensor
LVDTs are used in a wide variety of applications, do you think which application are most common of using LVDT sensors?
Jessica, Your own company's website (www.itargetsensors.com) lists a lot of uses for LVDTs, many...
> Turbine Valve control Thanks! How about hydraulic cylinder? ...
from the Forum department...RS485 shield termination
What is the proper method in how to terminate the shield cable of an rs 485 cable?
From National's AN-1057 note on RS-485 https://www.national.com/an/AN/AN-1057.pdf Generally, a...
from the Controls department...Mark-VI DCOM error
Mark-VI Station freezing up
Have you used the DCOM document that Wassim Daoud provided the URL for? It most likely could be...
from the Controls department...Alarm Segregation ABB AC 800F
Alarm segregation in ABB AC800F
from the Automation List department...Walkie talkie near PLC
can the signal from a walkie talkie radio erase the contents in a PLC processor if we operate the same near by.
Regarding Walkie talkie near PLC issues, tests attempting to reproduce source, path, and...
It may be bad manners to talk with your mouth full, but it isn't too
good either if you speak when your head is empty.