Control Panel Design for a Water Production System

Published on by in Technology

My colleagues and I are rehabilitating some water production systems in Nigeria, both ground and surface water, and I am currently looking into rehabilitating a (very old) control panel.

This is the first time for me and electro-technical matters are not necessarily my forte, so I was wondering if I could get some assistance in how to work out the required protections.

I have worked out that for over-current protection I need a thermal overload relay set to the maximum operating amperage of the motors, however I am stuck on some other protection equipment and would love some guidance. Specifically for voltage drop, phase failure and phase sequencing protections, what do I need and more importantly, how do you size them?

Are there any other protections required that I am missing (apart from lightning protection)?

Thanks in advance for your help!

Taxonomy

9 Answers

  1. I can help you with this. System protection and control is done having full knowledge of the characteristic of load in question. The ones you mention are basic.

    Overload setting is more than the RLA you mentioned.

  3. A biotechnology to revalorize wastewater producing a fertilizing liquid from organic farming land.

    The problem of drinking water in the world is intimately linked to the problem of wastewater treatment, its main source of pollution. 

    Land earth, soil and the sub-soils, the environment, natural hydraulic environment, the aquifers serve as a –trash- disposal for wastewater treatment. 

    Waste water with a biological characteristic contains gold-ganie, a natural enrichment of the topsoil.
    This liquid, which comes out of the "Fosse Biologique" process, contains water, fine particles of suspended organic matter, active bacterial flora, biochemical components (nitrogen, nitrate, potassium phosphate, ammonia, urea) a natural fertilizer.
    This biotechnology is implemented in the form of a biological purification concept that is of interest to every place that consumes water daily for domestic purposes.
    This biotechnology is established in all areas of the globe, anywhere, in any configuration, adapted to the production of wastewater: hotel, catering, industry, school, community, individual.
    Regardless of the location of the biotechnology installation, the discharge of the liquid at the outlet from the device is dispersed on a vegetated outlet in addition to purification of the process. This biodiversity can serve as a food support for the habitat but also for the community of the disadvantaged.
    The biotechnological concept of excreta treatment preserves the healthiness of areas with high habitat densities.
    Biotechnology, which immediately recycles liquid from the process, provides a reduction in the abstraction of drinking water from underground reserves while preserving groundwater from pollution.
    I would like to thank you for your interest in our Bio-technology for the biological purification of wastewater effluents.


    Good reception
    Cordially
    Jean Marius D’Alexandris

    Phones.
    mobile: + 33 (0) 603.658.726
    Fix phone: + 33 (0) 494.423.190

    Internet
    Enamel:     lyseconcept@gmail.com
    Website: www.lyseconcept.fr

    http://www.viadeo.com/p/0021laon6uiq7qp3
    https://www.linkedin.com/profile/view?id=76857248&trk=nav_responsive_tab_profile,
    http://www.interet-general.info/spip.php?article19572
    https://www.facebook.com/jeanmarius.dalexandris,
    https://thewaternetwork.com/member-8CG/lyseconcept-jean-marius-gu5XXIHyLbxtfabvCyhK-g/home,

    https://youtu.be/Kx3AI6t2lmk

    https://twitter.com/lyseconcept

    Scientific Communication 

    International Journal of Science and Research www.ijsr.net
    - Organic matter by Lyseconcept
    - Anaerobic does not exist on earth, anaerobic can not exist on our planet
    - Scientific certification in general condition of habitual functioning of a habitat

    - A Biotechnology for the final purification of excrements

    - School Biology Conference


    Inventor
    - The "Fosse Biologique" process lyseconcept
    - Biological Wastewater Treatment
    - Biotechnology unique in the world of excreta treatment

    Member of the Ordre des Experts International

    "Protect today what we were told yesterday to better restore it tomorrow".

     

  4. To secure phase, voltage and Ampere you can install these equipment at your panel:

    RCP = Relay Control Phase, which has a purpose to secure electrical installation from phase loss, phase sequencing protection and in-balancies between phase

    RCU = Relay Control Voltage, to secure any equipment at unstable Voltage

    RCI = Relay Control Current, to secure equipment from any current variation

    The common Relay which installed on the panel for Motor is only RCP.

    Those all above relay protection will cut off power at control station.  No Sizing is neccesarry, because it is measure indirectly from the main power cable.

     

    1 Comment

  5. 1. Do you have any access to an Electrical Engineering friend or University Professor? Try them for free professional help

    2. Or search for Electrical Engineering Certified contractors. They can study your system and give you an offer for upgrading the control system.

    3. From your post it seems that you need to revamp the old Motor Control Centre. With a booming oil Industry I am sure that there should be available good MCC manufacturers specially in the Port Harcourt area. Lagos also. Maybe Kaduna too. Talk to these manufacturers who can use components of any reputed make such as ABB / Siemens / Toshiba / Mitsubishi etc.

    4. Post a list of drives with Motor HP. Maybe I could ask some friend to help you out.

    1 Comment

    1. Thanks a lot for your help, in terms of electrical engineering I don't have any contacts unfortunately, I'm on the hydraulic side of things. The pumps involved are the following.

      1 x SQ5-70 – P2: 1.85kW - 1 x 200-240 V 50 Hz - Operating at 1.6kW

      3 x SP11-15 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415V 50 Hz – Operating at 2.8kW

      1 x SP14-11 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415 V 50 Hz – Operating at 2.6kW

      6 x SP60-10 – P2: 18.5 kW Three-phase, 3 x 230 V / 3 x 400 V – Operating at 16.6kW

      Ideally I'd like to understand rather than having the answer, so if you have a recommended link which explains the different protections and how to size them it would be great. My internet research has for the most part been confusing...

  6. I would suggest that you rework the entire process requirements and then work out the capacity requirements of the electro-mechanicals system afresh. It is wiser to provide electrical system with Earthing , MCBs and also check if there is any additional protection from provision of a transformer to stabilise Voltage if there is too high fluctuation in supply voltage.. May also study if Solar penal based generation with battery storage could curb any drop in Voltage.

    1 Comment

    1. Thanks for your comments. Regarding the solar I have found that "complicated" electronics tend to become problematic in more remote areas without expertise and maintenance, so I probably wouldn't go for that.

      When you say process requirements, I assume that you mean operating/start-up powers of the various pumps. This is known, so the electrical supply shouldn't be a problem, the main issue is protection, which remains a bit black magic to me ;-) Thanks for your input

  7. Usually MCCB's which would probably be part of your panel, can have both overload relays and undervoltage relays built in. Some circuit breakers allow you to choose between instantaneous overload or with a delay. You may need this if you have equipment that has a high starting current. A separate phase failure (no setting required) is a separate item or could also be built in. I am not sure about phase sequencing.

    1 Comment

  9. Hi Jonathan,

    We can most probably assist you with this.  You can contact me on email kobus@erasmian.com

    Regards

    2 Comments

    1. Dewater. Need not do more. Goal is 99.9% at 100,000 gpm. Filtration. New technology.

      PDF if you wish

      jimquigley5@gmail.com

    2. It always amazes me that expert opinion is expected to come free of charge.  

      1 Comment reply

      1. I apologise if this post is inappropriate. I thought the forum was meant for support between professionals, and not just selling products. I am trying to improve my skill-set through this process, not outsource without understanding. Once I understand better what it is I need, I will be able to employ a contractor for procurement and installation