Hello Everyone,
Just a quick question regarding safety stopping function of a rotating machine control system. Say I have 2 solenoid locks on two different movable guards and 2 e-stop buttons. I want to design a CAT 3 system to bring the rotating machine to a controlled stop with removal of...
Hello People,
Sorry for another DCS vs PLC topic but I have a few questions that aren't really addressed in most of the thread questions I have found.
I have been looking to SCADA and DCS systems and there is a lot of information out there defining them but no real 'practical' information. It...
Greg, I do see your point but I do tend to agree with rotaryw about expressing strengths rather than how to get around caveats, up until the interview process anyway. I would rather answer this in person. I do agree that finding the core requirements are essential so I would not apply for a...
Hello There,
Can anyone recommend some good text books or online material relating to the design and management of process control systems? In particular, mineral beneficiation processes.
I want a good general text, or a couple, I can refer to help with the design process from control...
Ok, thank you all.
Good advice in there. I can see the benefits to both approaches, either being 100% honest but careful in pointing out the lack of experience and ways to overcome, or not saying anything and really concentrate on my strengths. I suppose I will have to pick an approach and be...
Hello, thanks for the responses.
Compositepro - What exactly disturbs you about what I have written? I do get that a full understanding of the process is key to determine proper operational and design constraints for equipment and personnel. I have helped with the design of 3 previous pilot...
Hello,
I am currently helping develop a control system for a simple mineral process plant and need some assistance with alarming, in particular, when to deiced if an alarm is necessary or not. I am not 100% familiar with the process just yet but I have an idea of the critical aspects. I have a...
Thank you for the responses. I figured that was the best approach. However I do think the aforementioned position is for a more mid to senior level where I would still sit in the graduate level of experience. The company is one I would be very interested in working for so I am wondering if it...
Hello Forum,
Hope this is appropriate to post here but I really need some advice. I am trying to figure out what I can do about my career situation and I have a question relating to job applications specifically cover letter and resume details.
Ill start with a bit of context. I am a...
Hello All,
I am developing an interface and data logging system for a Red Lion G306 HMI. I don't have the hardware yet so I am using the emulator which is working pretty well so far as I have it communicating with real hardware such as the PLC. For this job I am required to log sets of data...
Ok Thanks for all your help. Hope I havnt taken too much of your time, this has been a rather long thread.
I do not have the exact lengths of the cables between boards, I made an estimate based on the physical distances between them and the current carrying capacity of the cables from the...
Hello again,
Ok so I am still trying to decide if I can be reasonably confident now that the 6kA breakers to be installed will be protected through cascading with the fault level available. The MCCB in the distribution board feeding the smaller breaker is a Schneider NXS100B. I found the...
Ok I think I am finally starting to understand how everything fits together. I read through a technical document from Hager explaining all the concepts you are talking about with some nice examples. It also cleared up some other concepts I knew about but did not fully understand such as where...
Cheers,
My calculation came out at 19.48 kA. I also tried to calculate the total resistance between the LV terminals and the distribution board in question to ensure a maximum fault of 6kA and came out to 0.027 ohms. Does this seem correct? Also the drawings provisions are that a 25kA SPD be...
