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  • Users: veegrid
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  1. veegrid

    IPS vs EHIPS aluminum tubular bus

    I know IPS aluminum bus and current rating with Sch.40 and Sch.80 bus as per IEEE-605. However, recently I cam across acronym "EHIPS" and it was giving about 10% ampacity than IPS tubular bus. I am not sure what EHIPS stand for and what other specification I should tell fabricator when...
  2. veegrid

    Two independent battery system in same control room

    Hi everyone, Typically for the substation control room, where I need to install two separate battery systems, we used to put in a separate room. Recently, I have a few situations where both battery systems need to install the same room. Each battery system is about 1300Ah Lead-acid battery and...
  3. veegrid

    grounding for metal heandrail on concrete staircase

    Hi I have a substation where the control house is about 100ft from the switchyard but within the overall fence. The entrance for the control house is at 5ft elevation from the ground. we have installed a pre-cast concrete staircase. And has recently added a metal handrail. The question is, do I...
  4. veegrid

    What X/R ratio should I consider for Bus Design using IEEE Std 605?

    What X/R ratio should I consider for Bus Design using IEEE Std 605? for grounding study, I typically enter X/R=20 in CDEGS software. However, for bus calculation, can I consider X/R=10?
  5. veegrid

    Medium Voltage Cable installation into Concrete Trench

    Why cannot medium voltage power cable (5kV-35kV) run into concrete trench? I guess safety issue, de-rating of cable ampacity, .etc? What's thought , direction here?

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