What are the relevant standards for grounding and bonding of Rail Road tracks ?I know Article 250 per NFPA talks about grounding and bonding but i am looking for very specific information on the applicable standards in this case?
I have an existing Radar Level transmitter on a Tank with a HART protocol. I want to hook up a pressure transmitter to same tank but on the already existing loop. what is the best way to run thisn connection as i think thisnis possible since they have same HART protocol.I need very clear ways...
For a pressure switch that is connected to a rupture disk which also has a PSV. Is it advisable to have the same set point with that of the PSV or a little lower?
What are some of the options or solutions to consider if its possible to restric airflow to a few valves that are thawing out to to avoid twisting the stems. Any ideas will be very welcome. Most of these valves have actuators with Air/Air Actuators with a speed of 1''/sec and have a size range...
Due to PDC-2 not having an emergency Generator and its consequence when there is loss of power from the main grid. The need to implement a Tie feeder breaker between PDC-1 and PDC 2 and run cables. This is to enable power supply to the UPS fed from PDC-2 without having to depend or use...
I have a Specialty Chemical boiler DA tank whose pressure/temperature control valve is not functioning correctly and subsequently the DA tank is feeding water to the boiler that hasn’t been preheated properly. After troubleshooting it was recommended changing the valve.A new one was installed...
What would be the place place to install a float switch(SPDT) and a pressure switch to shut down a pump on low oil level and low pressure which would be LSL and PSL respectively considering the schematics below. I think this will be a series connection but I am thinking of installing them...
Check out these results for megging a motor after an over amping issues was noticed. phase 2 GND
A- 168.5
B - 186.2
C- 131.7
And wire only phase to GND results are
A-B - 12.03
A-C - 9.49
B-C - 14.83
Every other tests like phase to phase and motor leads looks goodWhat are your thoughts. And...
have a very small metering pump that runs on 120VAC and Current of 1.4A with a max output of 250 PSI. Due to the size, what is a good relay and starter size that it will need irrespective of the distance between power source and point of installation which h gives a negligible VD.Asking cos this...
Aside Manufacturer procedure for motor re-start. Is there any general rule as to the time interval that should be allowed for re-starting a motor that has tripped? is there are such rule on IEC or NEMA etc?
There has been a flame scanner failure in our sulphur recovery unit where it was found that the flame scanner port assembly was red hot with the scanner face plate compromised and a coupling had melted resulting in the flame scanner suspended by a conduit. what could have led to this type of...
I keep having frequent trips of the scanner in the SRU unit. What are some of the reasons why a flame scanner would trip many times with respect to the mentioned unit and also in general? I do have some ideas but the more ideas and solutions I have would be very useful.
Aside electrical issues with STOP Switch and other electrical related issues, What could make a Pump run without stopping even after trying to stop it remotely and locally?
A 75 Hp centrifugal pump in operation suddenly lost its coupling plus the coupling guard. The bolts were dislodged and the motor kept spinning but did not trip. All motor control set points appeared normal. Can anyone explain why there was no trip when this occurred as the motor had to be turned...
I have a three phase Motor that keeps tripping sporadically every time it is turned on. Would not even run for more than 5 mins without tripping.I think this is more of an electrical trip as it is not over amping which has been confirmed
Kindly assist with a troubleshooting plan to use.my...
I have a Low Level Switch/transmitter that controls a solenoid operated valve. It is supposed to trip when level gets too low and have the valve close. Unfortunately it tripped and the valve closed when the Level was still good. To bring it back on, the solenoid had to be re-latched to bring it...
What are some of the online/on-Load tests/PMs that can be done on a transformer? i.e when the transformer is running. i know there isn't much that can be done but a comprehensive list of some of these tests will be very helpful to better improve on what i already marked down
Thanks
Brief History:
First Trip: investigation showed we had a fuse blow when starting up the compressor on the stop button circuit,We had it changed out the stop push button and its contacts and also swapped the DAP 218 PLC cards for the fact that output 11 on that card also went to the stop button...
Taking a look at the redlined drawing. A STOP push button is to be installed in series there. Would it be proper to take off the thermal switch there before installation or how else can it be installed without removing the thermal switch...
