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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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Unable to access Prosafe-RS tags in CS3000 Control Drawing
Confusion in defining calibration range
New Replies:
By James Fountas on 14 October, 2009 - 8:48 am -
Hi Gopi,
The calibration range may not be the same as the span of an instrument. For example,...
By Roy Matson on 13 October, 2009 - 11:09 am -
It is confusing as you say.
The calibrated range is where you define your 4 & 20 mA points
...
I need user manual or any technical drawings regarding Yorkshire YSF6 circuit breaker 11KV,630A
New Replies:
By russell on 13 October, 2009 - 11:44 pm -
would you kindly send the yorkshire switchgear manual to: russell.mccarthy [at] bbsaa.com.au
...
By Alan Whitham on 13 October, 2009 - 3:25 am -
>I have a complete manual for the above, its a hefty document, is there a particular part of it...
Abb station does not get "enter" command
Three phase motor's current is imbalance
New Replies:
By Roy Matson on 13 October, 2009 - 11:26 am -
Adil,
If you just measure the winding resistance with an Ohmmeter because the windings are quite...
Dear,
Whether any load of the 1 /2 phase nature like Xerox machine, Lighting etc is connected?...
By curt wuollet on 10 October, 2009 - 1:34 am -
No, only that it might be grounded. They do some strange things around the world. If it were, it...
By Adil on 9 October, 2009 - 8:37 pm -
> Did you do the test I suggested, low voltage transformer with Ammeter? <
Please explain...
By Roy Matsoin on 9 October, 2009 - 6:37 pm -
Adil,
Did you do the test I suggested, low voltage transformer with Ammeter?
This will give you...
By Phil Corso on 9 October, 2009 - 9:17 am -
Adil... voltage data provided confirm supply is not the cause of the problem.
VUF is about 0.3...
By kumar on 9 October, 2009 - 8:36 am -
Which point did you measure the current at motor connection or terminal block at control panel. It...
I'm extremely sorry for posting wrong readings by mistake.
The correct readings are as...
By Phil Corso on 8 October, 2009 - 7:59 pm -
Curt, surely you didn't mean to imply in your 08-Oct-09 (13:46) post that the wye-point in the...
By Phil Corso on 8 October, 2009 - 4:22 pm -
Adil, the data you provided thus far, indicates that the supply voltage VUF...
Can anybody told me how to tune Baldor Linear motor .
How should NGRs be connected during paralleling of generators??
New Replies:
By Phil Corso on 13 October, 2009 - 12:12 am -
Blackstoneboy, of course the current increases, but that's not the point. A major problem is to...
Dear Phil,
Analyzing the circuit, if the two NGRs are connected when the generators are in...
By Phil Corso on 12 October, 2009 - 12:14 am -
Blackstoneboy: a) the NGR has no effect on synchronization of generators; b) it is used to reduce...
By Bruce Durdle on 11 October, 2009 - 2:53 pm -
If you have two generators n parallel you want only one of them to have a grounded neutral - this...
I have come across a specification that states 'motor rotation to be changed at motor end only...
New Replies:
I'd vote for changing it at the motor if any conductors are color coded or have Wire#. We have all...
By curt wuollet on 11 October, 2009 - 9:26 pm -
Yes, we all have done the bump and switch. The value of having everything consistent is that,...
By Roy Matson on 9 October, 2009 - 6:30 pm -
Bill,
Of course it's easier to change the rotation at the MCC but that's just being lazy. If...
By Bill Code on 9 October, 2009 - 2:58 pm -
Lets say at the time of construction, all motors are (correctly) connected the same way. Now when I...
By faizal on 9 October, 2009 - 2:23 pm -
Dear Bill,
Actually these are only some standards. In an MCC, there are more than one motor...
ccw has it correct.
A modification to that spec I have seen (and used) is to switch the...
By curt wuollet on 9 October, 2009 - 12:50 am -
The rational is that your phase markings on the wire remain correct and consistent. It can be a...
Is a large generator (150 mW) harmed by VARs lagging above the mfg's PF limits in the published D-curve? It should stay below -12 mVARs and often runs between -14 and -30 mVARs. As the load increases, VARs come into rated values.
New Replies:
Thanks for your comments, Phil. The I^2*T comment got me thinking about V-curves, relating...
By Phil Corso on 11 October, 2009 - 10:24 am -
Road Surfer... the data you provided indicates that max design kVAr (lagging) is about 136...
Curious about fuses protection when using power distribution blocks.
Any standard for where static jumpers should be installed...
difference between min governor and max. governor in the steam turbine
New Replies:
By mike on 11 October, 2009 - 1:58 am -
My "guess" would its just like a clamp in toolbox. if we go above set point 1 logic bit...
I wonder if someone knows some procedure to calibrate a transmitter...
New Replies:
By M Griffin on 10 October, 2009 - 2:39 pm -
In reply to Roy Matson: There are two sides to calibration. There is adjusting the calibration, and...
By Roy Matson on 9 October, 2009 - 6:49 pm -
Glenn,
I'm not sure about the 9 point calibration.
What's the point if you only have a Zero...
Cable schedule and interconnection drawing format.
New Replies:
By Shailesh on 10 October, 2009 - 2:18 am -
Hello Everyone!
I have similar requirement, Can anyone please send me a good format of cable...
What is direct and reverse control?
New Replies:
By tushar on 10 October, 2009 - 12:25 am -
Direct Control - Output of controller increases as the process variable increases.
Reverse...
design of power transformer commercial buildings
New Replies:
By Phil Corso on 9 October, 2009 - 5:45 pm -
Faisal... contact me off-forum for a list of reference texts that will help you!
Regards, Phil...
By faizal on 9 October, 2009 - 2:08 pm -
Thanks Phil Corso for responding. it is an existing hospital building. New transformer is the part...
By Phil Corso on 8 October, 2009 - 8:46 pm -
Faizal... do you mean what construction-types are permissible? Or how to size the transformer?
...
ExxonMobil/World Bank have willfully violated International Hydrocarbon regulations and standards on Chad/Cameroon Pipeline.
New Replies:
The World Bank Compliance Advisory Ombudsman(CAO) has recently acknowledged my complaint that the...
I want a formula to calculate capacitance and high frequency characteristics of the cable
INTERFACING SIEMENS S7 PLC WITH ABB AC800M + COMPACT HMI
New Replies:
By Rob on 8 October, 2009 - 11:02 pm -
Yes, you can if you wish. No, you don't require any other methods.
I assume your S7-313C PLC...
Looking for a PC running XP or similar that contains RS-485 ports.
New Replies:
By M Griffin on 8 October, 2009 - 8:58 pm -
It depends on what are you looking for besides RS-485. It's hard to make a specific recommendation,...
Need 2 sensors/flow meters for a diesel engine
New Replies:
By Allan Evans on 8 October, 2009 - 7:38 pm -
Go to any auto electrician or major car supplier and get a couple of their fuel flow transducers....
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