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  1. Yme48

    Isolated Ground

    What is an isolated ground? How can a ground be isolated? Is this a derived or floating ground? Would appreciate any comments or derivations. Some of my colleagues suggest they are no longer required for today's loads and I am not able to support a position either way.
  2. Yme48

    UPS Battery Types

    Thanks to all for some very informative comments. My application is for a large data center. Environmental issues are certainly a concern as well as maintenance costs and overall footprint. We have had Gel Cells in place for 5 years that require replacement. Battery vendors are trying to...
  3. Yme48

    UPS Battery Types

    Hello all, I need help identifying the different types of large scale UPS (750kVA, 480V) batteries. Sealed lead acid, gell cell, wet cell, etc... Can anyone explain the differences between them, advantages/disadvantages of each type. Perhaps a good baseline reference? Thanks Yme

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