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  1. Mefi01

    Simulated signals

    Hello Can someone recommend testing equipment one can use to simulate both digital and analogue singles that a commissioning technician can use ? What input generators can be used to feed 0/1 signals to PLC ? Thank
  2. Mefi01

    Input signals to MoVS

    xnuke , Thank for your response. Please provide a schematic if possible ? itsmoked, yes but these are not important, I just need to trigger the MOVs without caring too much about the monitoring signals
  3. Mefi01

    Input signals to MoVS

    Dear all, I would like to control motorised operated valves using PLC which is in turn is triggered by a manual switch . I’m now adding a scada system and want to be able to trigger both the PLC using the manual switch and the scada ( simply by triggering a digital input signal ‘1’). What are...
  4. Mefi01

    Determining the correct ASME class

    Hi everyone, I am looking at a system wich will be designed for an crude oil company which involves some pipelines,pumps, site instruments etc. I am now given the process information and was wondering if someone could help me work out weather ASME class 300 or 600 is required? Operating...
  5. Mefi01

    pumps design

    thank you for your responses
  6. Mefi01

    pressure rating

    thank you for your responses
  7. Mefi01

    pumps design

    I am working on a project where a company is bidding with a solution for a pump which he claim meets our requirements. He mentioned the pump vendor combined ISO standards ( ISO 2858 and Iso5199) to meet our requirements. I am just wondering if it's true that vendors can combine standards when...
  8. Mefi01

    pressure rating

    hello there, I am working on a project where I am asking a vendor to provide me with a system of a pressure rating of ANSi #300. The vendor has recommended both ISO15783 and ISO2858 pumps. Please let me know if the suggested pumps are compliant with my system?
  9. Mefi01

    pipeline terminologies

    Hello Friends, I am control engineer and currently working in the design of crude oil skids. I have just started the job and I find myself dealing with various terminologies that I do not understand including SS316/304, pressure rating , ANSI rating ( #150,300 etc), pipework standards ( ASMI...
  10. Mefi01

    installation and commissioning

    Hello, I am new to installation and commissioning and was wondering if anyone has a guide or a manual on the type of installing, testing and commissioning procedures for all site equipment that are generally connected with plc including, pressure, flow, temperature transmitters, flow control...
  11. Mefi01

    earthing for data centres

    thank you Keith! any responses from anyone please friends?
  12. Mefi01

    earthing for data centres

    Hello all, I am doing the earthing for date centre , as shown in the attached drawing, we have four racks each of which is fed from a different source ( different DBs and switchboards), can someone show how the earthing can be done? With this be affected by the fact that each rack is fed from...
  13. Mefi01

    power infrastructure

    Hello, I am designing the power infrastructure for a factory that has around 20 CNN, Welding , drilling machines etc ( with loads between 4A to 50A) and based on the loads I have, the max amperage demand is around 400A with a diversity of 50%. with this in mind, one can supply these through...
  14. Mefi01

    Sizing MCB for static inverters

    Hello, Do we normally need to take the charging current into consideration when we size the MCB for static inverters? says we have (3Phase in-1phase out) 11KVA static inverter , what would be a good size that we can use for the MCB when supply voltage is 415V?
  15. Mefi01

    sizing fire pumps generators

    Hello everyone, can someone give me a firm answer on the way in which generators feeding fire pumps can be sized ? is this carried out with respect to the inrush current or the nominal bearing in mind the first is 3times the latter ( start Delta starting)?
  16. Mefi01

    RMU and switchgear

    Hello friends, could someone please explain the main difference between a ring main unit and MV switchgear. in a substation do we have to have the two?
  17. Mefi01

    any suggested online courses?

    Thank you Alan Do you still have any of the teaching materials you have covered please?
  18. Mefi01

    any suggested online courses?

    Hello friends, I am just wondering if there are any useful online courses in electrical design, that I can be introduced to please, preferably British standards but open to other standards ? anything related to substation design, MV and LV distribution network design, cable sizing etc
  19. Mefi01

    Vacuum circuit breaker sizing

    Thank you
  20. Mefi01

    HV and LV distribution networks for healthcare facilities

    Thank you ScottyUK Do you have any other materials/guides ?

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