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Hi We want to start the PM of cables and cable trays at our plant. We will check the following items in the course 1. Physical inspection of cables and cable trays. 2. Look for sharp edges along the bents of cable tray. 3. Check the ground connection integrity. Can you please identify some...

rragunath The GT-A is actually picking the MVARs and it is not relay malfunction. The setting of all the AVRs is identical Always excitor we have checked the diodes and did not observe any abnormality

I work in a gas processing plant where electrical power is generated by three identical gas turbine driven turbo generators (A, B and C). Each generator is rated 11kV 20.38 MW at 0.8 PF 430C. During normal operation 2 out of 3 generators are run to feed the plant load (32 MW approx.) while the...

We are an oil plant. Our working voltage levels are 11kV, 3.3kV and 415 V 50 Hz. 20.38 kW x 3 Generating units.

Hi I m trying to select some technical magazines and manuals for our electric department. Can somebody help me in the selection. Thanks

Ok. Thanks for replying and I am contacting GE for this problem.

We are facing a problem regarding the firmware revisions of the SR 489 relays installed at the our site generators and the spare relay that we have ordered. Spare SR 489 relay Serial # : A3230577 F/W Rev: 32 I 15 2A 8.00 MFG date: July 23, 2003 Installed SR 489 relay Serial # : A3230577...

Hello I want to design a solar energy system for our wellhead. The system will cosist of Solar cells (energy source, Solar regulators, Batteries and Load consisting of a lamp, A base set radio and a fan. Please tell me 1. Where should I start from? 2. How can I perform the calculations and...

In the upcoming shutdown, we want to do the IR test and measure the winding resistance of generator winding. The generator is rated 11kV , 20.38 MW , 1337A, 0.8 pf. We dont have enough time in the shutdown open up things completed. 1. What can be the best way to measure winding resistance and IR...

Thanks guys for your valauble comments. these will definitely b e helpful in the decision making and fault troubleshooting

Thanks guys for your valuable support. Further to this please help me in selecting a good oil testing equipment if i decided to do it on site. busbar can you suggest the IEEE standards for the test you have mentioned. Thanks

Please tell me the necessary tests that must be performed in a tranformer oil on yearly basis Best Regards

Can anyone tell me where I can find comprehensive description of a motor's mechanical components, frame sizes, IP, IC classes etc Thanks Photocell

Can u tell me what is the supply voltage available. As far as I know Soft start is suitable for low power motors.

Thanks all of you. I think that the things are now well unsderstood. Specially the article refered by digitrex http://www.measurlogic.com/pdf/dpi/pq6.pdf was a great help. Thanks again and i conclude this discussion. I will come back with some other questions that are still in my mind...

jraef: I'll be waiting for ur mouse to move on. Couldnt understant the last line "Venditori de oleum-vipera non vigere excordis populi" electricpete: yes it can be a case of several time reclosure because voltage dips were detected on the feeding bus solid state voltage protection relay's event...

Digitrex: My problem is little bit different than yours. We have a 300 kW motor and had a loose connection in the control wiring of the motor starter that eventually led to the drop off of contactor. We beleive that the contactor had re applied to re accelerate the decelarating motor. The motor...

Hi Please tell me what will be the magnitude of current taken by a three phase induction motor when the motor is running at full speed and the voltage applied to it suddenly resduces to zero and then come back again (e.g when the contactor of the motor drops and makes again.) Will this be...