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Recent content by Marvie

  1. Marvie

    Price for Neutral Earthing Resistor

    We are seeking to procure a 100kVA 30kV 19 ohms Neutral Earthing Resistor. Anyone know how much it would cost and contact or websites to Neutral Earthing Resistor Manufacturers?
  2. Marvie

    Neutral Grounding Resistor Dimensioning

    How do I calculate the neutral grounding resistor value for a 3.2 MW 690V synchronous generator? What is the best way and what applicable International Standards are there?
  3. Marvie

    SURGE SHAFT IN POWER GENERATING STATION

    I am trying to understand the main functions of the surge shaft (or surge chamber) in electrical power generating stations. Any reference information will suffice.
  4. Marvie

    UTILITY PROTECTION PHILOSOPHY

    Thank you jpalmer for your contribution. I am actually looking at the whole spectrum of Power System Protection.
  5. Marvie

    UTILITY PROTECTION PHILOSOPHY

    I am trying to peruse and compare different power system protection philosophies in use in different Utilities. I would appreciate sharing with any who could have them available.
  6. Marvie

    Standards for Shunt Capacitor current limiting reactor

    What are the applicable standards for specifying for shunt Capacitor current limiting reactors?
  7. Marvie

    Maintenance of Capacitive Voltage Transformers

    Can any one out there kindly avail sites or literature on the maintenance of Capacitive Voltage Transformers, their common problems and how to resolve them?
  8. Marvie

    OVER HEATING CVT

    We are experiencing a situation of an over heating CVT on the sub transmission network even without secondary load. Any similar experiences or suggestions to what could be the cause?
  9. Marvie

    SUBSTATION BATTERIES

    Concerns have been raised in the past by Environmentalists on the choice of substation batteries. What are the pros and cons of using either Nickel Cadmium or Lead Acid batteries?
  10. Marvie

    DIELECTRIC DISSIPATION FACTOR

    Anyone out there who knows of a site that intensively covers the area of oil dielectric dissipation factor (tan delta)?
  11. Marvie

    EFFECT OF CHARGING CURRENT ON TX. DIFF PROTECTION

    What effect does the line charging current have on a transformer differential protection?
  12. Marvie

    Engineering training & experience

    Simboti, I see that you have just graduated from school where I presume you should have read a lot of material. Now that you are in Industry, this is your best time to translate all those theories into practice by being personally involved in as much as there is practically. I agree with TMD...
  13. Marvie

    CT Parameter Calculations

    Ohms, I believe that once you have the value for the knee point voltage and you know your burden then from your ohm's law you should get your required minimum current before saturation.
  14. Marvie

    Protection Relays Testers

    The Omicron CMC 256 is the ultimate test equipment but the freja from Programma is also still equally good and I find the Freja more durable.

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