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  1. tapankatwala

    VRLA batteries and gas detection requirements

    Hello, I wanted to inquire if there are any known requirements for gas detection meters for VRLA (valve-regulated lead-acid) batteries which are used in to serve data centres? I understand that VRLA batteries usually re-combine hydrogen and oxygen and keep the moisture sealed within the...
  2. tapankatwala

    Rationale why switchable lumen LED fixtures are cheaper than fixed lumen type

    Hello, I inquired with a lighting supplier about budget pricing for fixed lumen type LED troffers (1x4, 2x2, 2x4) and 4' LED strip lighting as well as switchable lumen and tunable CCT LED fixtures for the same type. The fixed lumen type fixtures were quoted at 2 times the price of switchable...
  3. tapankatwala

    MCC vs panelboard feed for pumps

    Hello, I wanted to understand when to use panelboard to feed motor loads v/s MCC. There are about 10-12, fractional to 2 hp, 1-phase, 208V, pumps which needs power in a heating system design. These pumps have ECMs and hence wouldn't need starter, but would require control via BAS. The total...
  4. tapankatwala

    Estimating available capacity based on peak demand

    Hello, I wanted to inquire if it is possible to estimate available electrical capacity in an electrical distribution system based on only peak demand information available. For e.g. if an 800A, 347/600V, 3-phase electrical service has a peak demand of 175kW, would it be safe to assume the...
  5. tapankatwala

    slowing down frames in matlab movie file

    Hi, I have created a matlab movie file by getframe command. I can play the movie with the framespeed that i specify, but when i want to convert the movie in mpeg format using mpgwrite, it converts without slowing down the frames and that results in a faster playing file. How do i change that...

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