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  • Users: shlim
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  1. shlim

    Is damage to cable outer sheath/jacket detrimental to inner XLPE insulation?

    Hi, I have an installation of 132kV XLPE single core copper conductor, with copper armouring (attached photo). These cables were in trefoil formation, tied/fasten with polymer rope (likely nylon). At some of these ties, the rope had "eaten" into the outer sheath, where I could see the...
  2. shlim

    CO2 cylinder valve - function of the "push button/cap"

    Dear all, I hope this is the relevant site to post my question. Please re-direct me if there is a better channel in this forum. I came across a CO2 fire suppression system, which had been claimed to have been activated after a small fire inside an electrical room. 1. The pressure gauge for...
  3. shlim

    Can coal dust causes arc-flash?

    Hi, I hope this is the right place to post this question. I have an arc-flash incident, with known presence of coal dust accumulation and high humidity environment in the electrical room. From my current readings, I note that some coal type are conductive and some are not. I am looking for...
  4. shlim

    Transformer bushing power factor

    Hi all, is it possible to have bushing power factor test result to be more than 1 (one). Is this measurement different from the typical power factor for power system (unity = 1.0)?
  5. shlim

    Improvement of PVC materials for cable over the years

    Hi there, I am looking for any references comparing the quality of PVC-insulated cable made (say) 40-45 years ago vs today. Is there any improvement(s) in terms of materials composition, or the quality in general, for PVC-insulated cable, made 45 years ago versus the same type of cable made...
  6. shlim

    Wiring for Lighting

    Hi there, I have a case where a small fire had occurred at a wall switch for lightings in one office space. My electrician suspected too much loads routed to one single wall switch, up to 12 fluorescent lights (28Watt each), and that the norm is maximum 10 lights per switch. Please share some...
  7. shlim

    Recommended number of LV cables in cable truncking

    Hi there, I came across with a small fire incident within an old building (said to be 40-50 years old) at the incoming LV power supply cabinet. I noticed that there were signs of arcing on the cable trunking (at the bend section) housing the power cables into the cabinet. The cable trunking...
  8. shlim

    Is metal/alu-can type capacitor more rugged?

    How true is that a metal/aluminium type enclosure capacitor is more rugged as compared to a plastic can/enclosure, generally? I cannot find any reference on the Internet. Thanks in advance.
  9. shlim

    Unidirectional or Bidirectional

    Helo, I have a motor which drives a coal crusher. Is there a way to determine whether it is a uni-directional or bi-directional motor? I currently only have its rating, specification plate. I have been trying to look for the information online, but only managed to get the catalouge of the...
  10. shlim

    Generator Breaker

    Hi there, this is my first posting since I subscribed to Eng-Tips. I have attended a generator failure in a diesel driven power plant. According to the plant, there had been multiple tries to sync this particular Gen to the grid. After replacing a few electronics component, the Gen still...

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