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  • Users: mparenteau
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  1. mparenteau

    Rotary UPS Grounding question

    All, I am the owner's rep for a project in design, which is to install two 2.1MW, 15kV class rotary UPSs (coupled with diesel engines for extended outages). Upon loss of utility, we obviously lose our ground reference. Two options: 1) Zig-zag w/ resistor (LRG). We would have to upgrade our...
  2. mparenteau

    Spot Network AICs

    Folks, Question: We have a number of spot networks on our campus. Most configurations are as follows: 13.2kV to a 480V or 208V system where we have two matched step down transformers, each feeding a NP to a common bus. Here's my question: From an interrupting perspective, I understand that...

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