from the Forum department...When 2 out of 3 poles of the circuit breaker of a Generator are closed
What will happen when 2 out of 3 poles of a 220 kv circuit breaker of a 330MVA Generator (of a steam power plant) is closed and one open when the generator (via GT) is connected (or synchronized)with 220kv bus?
Santanu... The disturbance question I replied to was just the opposite of what you described, and I...
Santanu... if closure of the faulted-breaker at the instant both the generator-side PTs and the...
Santanu Das, The answer to this is complicated to explain in words. The simple, but not...
from the Level Control department...Magnetorestrictive Level Transmitter issues
Extreme vibration and loss of signal on level transmitters
By Sam on 15 April, 2013 - 7:54 am -
Hi, The FPSO's I worked on made use of Guide Wave Radars for their interface measurements. I...
from the I&C Root Cause Analysis department...Mark VIe PDIO Failures
Mark VIe PDIO cards failing very frequently. We are looking for a company to conduct an RCA on the failures and provide corrective actions to minimize/eliminate failures.
from the E&I department...Hazardous Area Certificate for Mechanical Equipment
We are installing a multi turn pneumatic actuator for a gate valve, which runs on hydrocarbon gas. Do we need a hazardous area certificate for the rotary actuator?
from the Mechanical Engineering department...Motor power maximum
what is the accepted margin between motor power and pump-maximum power?
from the got idea..not sure if possible department...PLC project
Working on Project. Still in idea stage. Got one, but not sure if within the realm of reality considering my abilities...Just looking for someone experienced to yes or no whether this would work.
By Ed W on 14 April, 2013 - 2:08 am -
MediaMation makes small PLC type devices that are designed to work with audio and MIDI. They are...
from the instrument department...Instrument couse for Construction
I'm working in the instrument construction field, i would like to ask all of you if somebody knows some cources can increase our skills?
Hi, There are lot of courses are being conducted for I&C professional throughout the world....
Hi, Your friendly local moderator here. It would help people answer this question if you told...
from the Mechanical department...Starting means turbine shaft fail to break turbine away
When we try to put the machine to turning we get the following trip "Starting means turbine shaft fail to break turbine away"
By Chandra on 13 April, 2013 - 12:27 pm -
We are using 6 Units Frame 9E gas turbines and we often have the problem with failure to break...
Controman makes an excellent point! Be sure to check the lift or "jacking" oil pump...
Umar and KP, Is there in your gas turbine what we call lift oil pumps for generator shaft...
Torque converters do wear out and do require refurbishment. If the site uses the cranking motor for...
By KP on 9 April, 2013 - 11:54 pm -
We have come across a same problem in same unit (GE9171, Mark VI) after 14,000 running hrs. Does...
from the mm department...Lube oil filter on GE Frame 9FA
The lube oil filter on GE Frame 9FA machines only works when we are opening the 1/2" Filter drain valve.
Ashutosh, You also have a P&ID of the lube oil system, which you can use to understand how...
from the Forum department...24VDC power supply fuse protection
24VDC Floating power supply fuse protection.
By roy Matson on 12 April, 2013 - 7:21 am -
I have seen power supplies ungrounded with a pair of lamps Positive - lamp - ground - lamp -...
By sakram on 10 April, 2013 - 6:02 am -
Dear Russ, Thanks for your reply. We are extending (+) to field limit switches and connecting...
By Sakram on 10 April, 2013 - 5:36 am -
Dear Bob, Thanks for your reply. We are extending 24VDC(+) from the PSU to the limit switches...
By Russ Kinner on 8 April, 2013 - 6:13 pm -
I use branch CBs to isolate the 24 VDC from its load but that is not "protecting" much of...
By Steve Myres on 6 April, 2013 - 8:13 pm -
It's bad practice to run your 24VDC ungrounded. I've seen it cause not only inexplicable bizarre...
By Bob Peterson on 6 April, 2013 - 5:35 pm -
To your first question - required can mean a lot of things. It might be a local government enforced...
from the Tank Gauging department...Honeywell Enraf Data Disappearnce
Enraf data display suddenly disappears.
from the INSTRUMENT department...LEVEL TRANSMITTER 3300 SERIES ROSEMOUNT
When temperature fluctuates the level goes beyond correct level giving some peaks. How to control the level even if the temperature changes?
from the Automation List department...Standard for Encoder Gray-Code
I'm looking for a standard gray-code table, if one exists.
By Nebojsa Mrmak on 10 April, 2013 - 1:14 pm -
> Might as well use a 256-byte lookup table for an 8-bit code. I'm not sure how far back the...
from the Forum department...Converting XBT-L1000 to Vigeo Designer file
Can a XBT-L1000 file be converted to a Vigeo Designer file?
from the Automation department...OPC Server for Honeywell Total Plant Alcont - TDC3000
I want to communicate with Honeywell Total Plant Alcont - TDC3000
from the can a dream become true? department...Advice on how to reach Oil & Gas industry
I'm trying to find a way to go to work on an Oil plant.
Thank you for your feedback Dan it helps for sure, especially the connection between assembler with...
By Dan Ingold on 6 April, 2013 - 11:25 am -
Hi Rafluska, Your background in AI and high-level languages (HLL) doesn't handicap you. If...
from the Electrical Engineering department...Electronic Energy meter
Does an electronic blinks (though the pulse rate is too low, about one pulse in 8-10 min, in a rated 3200pulse/kwh meter) even when i am not consuming any power at all?
from the Forum department...Cable Voltage Rating
Internal Panel Wiring Cable Voltage Rating
from the Doubts department...AVR prismic a30
Standby card leds 1 and 2 has been switching on AVR Prismic
By Sebastian Rebord on 5 April, 2013 - 1:27 pm -
When the AVR is operating in main and the balance with the standby is OK, LED1 and LED2 have to...
from the Forum department...Transfer Function of a Solenoid Valve
Looking for a transfer function for a solenoid valve which regulates the quantity of steam that is provided to a heat exchange coil
Sebastian is right... i should have double checked my logic and math before i submitted that one......
By Sebastian Rebord on 5 April, 2013 - 11:32 am -
Declan, As NIC said the easiest way is consider the transfer function as a first order delay...
Declan, The easiest way is to assume that the model just involves a simple time constant....
The Valve I am looking at is a proportional valve (control valve) where the output flow is...
from the Forum department...temperature and velocity control of sandy air in duct
I need some help with selection of air velocity and temperature sensors & actuators that will work on hard environmental conditions inside the air-duct.
By Bhavesh on 5 April, 2013 - 9:09 am -
Hi, For temperature sensor, it should be kept in mind that high air speed and that too with sand...
from the Forum department...Difference between DCS and SCADA
What's the difference between DCS and SCADA systems?
from the Forum department...DC Soft Start
DC Soft Start Ideas
By Curt Wuollet on 3 April, 2013 - 8:25 pm -
That idea may work and you could play with the curve as needed but with low frequency pwm, the...
from the ELECTRICAL department...LOW RPM BLDC MOTOR
Up to how much low rpm can a BLDC motor be designed?
from the Completely lost m8 department...DeltaV Newbie Needs HELP
Desire to speed up Drawing
from the Electrical department...Need Technical Detail of Energized Cable Sensing Device
we are having 15 number of Ring main units with Schneider 11kv,RE2c type.we need a detector which will detect from outside of cable, we are using trefoil 630 sqmm xmpl cable.Any sensor's available,just we need to know which RMU's powe
Down with categorical imperative!