Recent content by udshred

Hi there, Turbines generally would have trip multiplication when passing through the critical speeds, where the trip values are multiplied by some factors as it is expected that there would be vibrations more than the normal trip levels. I am not sure about how it is with the GE Mark series as...

Compressor have cooling time to save energy and to stop frequent motor start/stop. You can disable that setting. Apart from that check the discharge pressure switch/transmitter which is used for pressure sensing if it is actually sensing the low pressure or not.

Incorporate a fault capture routine with a GSV instruction in the controller program code...that would help you to diagnose the problem...you can even reset the fault when it happens by incorporating a rest rung for the particular fault. Now, implementing this would require a download and best...

Did you check the governor actuator and fuel rack mechanism are working fine or not??? I would seriously consider checking it. Stuck fuel racks are not uncommon problem. As you have found that your governor controller is working fine, I would now want to check out in the field.

Preventive Maintenance means routine checks. Cleaning, air leakage checking, gland leakage checking etc. are some normal stuffs which are generally done for a control valve. Apart from that depending on your plant's risk taking for a particular process you may devise other stuffs too like...

Did you investigate the CT?? Are current on all the three phase showing less value?

Yes you should be able to do it. If your incremental scale factor, frequency response range, linear range, calibrated to target material and temperature specs matches then you should have no problem doing it.

Sensor model? This generally happens due to the integration from acceleration to velocity and corresponding amplification in the internal electronics of the transducer. In time waveform, acceleration and velocity are always 90 degree phase shifted. The problem is called ski-slope problem. Try...

Go online with your rack configuration software and extract the event log data. See for any error over there. If there are any faults within the BN3500 system it should get logged there.

Yes it is possible, but the technique to be used is different not the conventional FFT. Enveloping demodulation technique type is to be used to detect very early stage of bearing failure where the sensors resonant frequency is utilized to pick-up the bearing fault frequency, usually greater than...

Absolutely.. Hi Jagadeesh, Overhung imbalance would generally have high 1X axial..generally recommended range is from 0.8X to 1.2X and misalignment can have 1X,2X,3X and so on because of rocking movement of the overhung confguration. Also looseness would have the same but with a higher floor...

Hi David_2 Actually it is the same for other smart positioners like Sipart ps2, Ebro Ep200 etc.When I was working in core instrumentation maintenance & projects, I always kept this value as a rule of thumb during troubleshooting & commissioning. Infact it is actually for almost all smart...

Hi Jagadeesh, Check whether the 2x is not a part of the line frequency component. If it is not then it might be a overhung imbalance or misalignment or bent shaft or looseness but requires additional analysis to pinpoint the problem. Phase readings/ Orbit plot would have given a much clear...

It is a Power Supply unit problem. Replace it.

6.3Vdc is too low for DVC to work...Your voltage drop is too much...minimum voltage required would be around 10Vdc at 20mA if I may remember it correctly.