Welcome to Control.com, the global online community of automation professionals.
Control.com - Nerds in Control
Member Login
Search
Jump to a Date
Sponsored Communities
Cool stuff
Twitter Feed
Neat Stuff
Visit our shop for nerds in control lifestyle products.
Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
"I am not sure what this is, but an `F' would only dignify it."
-- English Professor
-- English Professor
RSS Feed
Use this link to get an RSS feed of the Control.com article flow, for private, non-commercial use only:www.control.com/rss/
To get a personalized feed, become a member at no cost.
Mesh Loop Analysis problem
New Replies:
By Bruce Durdle on 8 October, 2009 - 2:54 pm -
It does not make any difference which direction each loop current is
assigned.
But if loops...
By Phil Corso on 8 October, 2009 - 8:26 am -
Rushi, the current direction is arbitrary. But, choosing one direction is less prone to error!
...
I have come across a specification that states 'motor rotation to be changed at motor end only...
Three phase motor's current is imbalance
New Replies:
By Phil Corso on 8 October, 2009 - 2:11 pm -
Adil, what is motor's rated current?
Phil Corso...
By curt wuollet on 8 October, 2009 - 1:46 pm -
If the center of the wye is not grounded, look at the voltages when running wye. An abnormally low...
Get the motor surge tested and also interchange the rotor with similar specification motor...
I've rotate the phases of the motor at the output of the magnetic starter. So, the winding, which...
> Is there a VFD controlling this motor? You could possibly have a bad IGBT not gating <
...
3 phase-to-phase voltages are 201V 202V 201V, and phase to neutral voltages are 400V 400V 400V....
By Roy Matson on 8 October, 2009 - 12:22 am -
Possibly a turn or two shorted in the winding with the high current. The resistance reading isn't...
By curt wuollet on 7 October, 2009 - 9:52 pm -
I don't follow your reasoning that if the currents move with a conductor change, it points to the...
By Phil Corso on 7 October, 2009 - 7:28 pm -
Adil... What are the 3 phase-to-phase, and the 3 phase-to-neutral voltages?
Regards,
Phil...
Is there a VFD controlling this motor?
You could possibly have a bad IGBT not gating. Might have...
What is direct and reverse control?
New Replies:
By Anonymous on 8 October, 2009 - 11:54 am -
The Other definition which is easier to remember is :
With increase in PV if MV increases:...
By Lou on 7 October, 2009 - 9:19 am -
Do you mean Direct and Indirect Acting Controllers (PID)?
If this is the case then this is the way...
Looking for a PC running XP or similar that contains RS-485 ports.
Need 2 sensors/flow meters for a diesel engine
New Replies:
By David on 8 October, 2009 - 7:32 am -
Turbine meters were originally developed as fuel flow meters. Ideal for the application...
By Roy Matson on 8 October, 2009 - 12:42 am -
Coreolis meters will do that but they are expensive. You might get away with gear type meters...
I wonder if someone knows some procedure to calibrate a transmitter...
New Replies:
By Glenn Powell on 8 October, 2009 - 4:22 am -
Michael,
You should have a SPEC SHEET made up by the engineer showing you all the calibration...
Where can I find instructions to rebuilt a car alternator to be used as a wind turbine alternator?
New Replies:
By Roy Matson on 8 October, 2009 - 12:33 am -
You will have to have some sort of speed increaser Gearbox or belts. I don't think the alternator...
By bijaya on 7 October, 2009 - 4:38 am -
Hi
I am planning to build a reaction turbine based alternator (220, 50 Hz) using a car...
How to put to master in the same Modbus bus RS485
New Replies:
We manufacture a Gateway that allows two Masters over the same Modbus Slave devices. It is our DX...
i have confusion regarding use of diaphragm seal,syphon, snubber for a pressure gauge...
New Replies:
By Roy Matson on 7 October, 2009 - 1:13 am -
If your pressure gauge is installed below the tapping point you don't really need a siphon because...
> What are you trying to measure? <
i am trying to measure pressure for a sulphuric acid...
By Sandy on 5 October, 2009 - 9:49 am -
> i have confusion in filling my datasheets regarding usage of diaphragm seal, syphon, snubber...
power management feature of 8051 in DS5000 board using basic functions like low power run mode, suspend mode, resume mode
I would like to know the best industry practice for type of transformer to be installed offshore....
New Replies:
By Phil Corso on 6 October, 2009 - 12:45 pm -
Kunal, typically standard transformers are allowed in Class I, Div 2 locations provided their...
Designing of Deaerator level control loop for super critical power plants.
New Replies:
By Ananda kannan on 6 October, 2009 - 12:32 pm -
Dear Ankur,
Deaerator level settings: -
HHL - Turbine Bleed steam motorised valve close
HL -...
Leading power factor for backup generators
New Replies:
By Phil Corso on 5 October, 2009 - 8:37 pm -
Bhagwan, I concur with Jojo's recommendation that you seek the manufacturer's SOAR... also known as...
By jojo on 4 October, 2009 - 9:27 am -
If you are running with a real power load of 1600kW, you can go up to 1200kVAr on your genset. For...
By Bhagwan H Prajapati on 2 October, 2009 - 6:36 am -
Dear Sir
Can we please tell how much reactive power can be loaded on a genset in my condition,...
Can anyone tell me what difference between EEx ia and EEx [ia] and [EEx ia]?
New Replies:
By Bruce Durdle on 5 October, 2009 - 2:51 pm -
What is the zone you will be working in?
If the equipment is to be installed in Zone 0, then you...
By SKS on 5 October, 2009 - 7:16 am -
Dear Mr.Bruce,
First of all i would like to thank you for your support to all engineers who...
Does drilling a hole for in cable gland nullify certification?
New Replies:
By Sandy on 5 October, 2009 - 9:29 am -
Hi There,
What certification does it have?
If it's Eex e or Eex n there is nothing to stop you...
By ger on 5 October, 2009 - 9:10 am -
I don't think it will matter with the atex certfication, however if it is an Ex or An IS JB then it...
Using IS instrument as non-incendive
GT Trip on IGV control trouble
New Replies:
The originator has a problem of IGV control trouble trip with CSGV moving down and under a prefixed...
What type of equipment is needed to duplicate commercially available motion platform designs using off the shelf equipment?
New Replies:
It has been several years since you posted this inquiry. I have the same interests and have spend...
two motor with the specification 'V 230/400 delta/star'
New Replies:
By Bhagwan H Prajapati on 2 October, 2009 - 7:00 am -
Dear nawaz
What u have mentioned is that .37kW means 370Watt means the motor will draw approx .64...
from the Forum department...
Screened VFD Cable in Hazardous Area with Ex e or d protection techniqueScreened VFD Cable in Hazardous Area with Ex e or d protection technique
Can a VFD be configured to have a delay? Its a robicon VFD.i.e you increase its frequency and the motor speeds up after a while.
New Replies:
By Ger on 2 October, 2009 - 3:26 am -
one way to find out is if u have an analogue input signal coming from the VSD, see if this...
By Allan Evans on 1 October, 2009 - 10:23 pm -
I've seen engineers spending hours trying to tune the level control in a big tank. Presume you are...
By curt wuollet on 1 October, 2009 - 9:58 pm -
Why don't you configure the VFD to show frequency and see if it is responding or if ramps are...
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2009 Nerds in Control, LLC. All rights reserved.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Patronize our advertisers!