Time Domain Reflectometry (TDR): Technology Review and Applications

แชร์
ฝัง
  • เผยแพร่เมื่อ 7 พ.ย. 2024

ความคิดเห็น • 7

  • @sinethembalusawana
    @sinethembalusawana 14 วันที่ผ่านมา

    I thought I was just gonna have a look and close the video not knowing that I will end up watching the entire video😁. Thank You I really appreciate how you explained the topic.

  • @jluke6861
    @jluke6861 9 หลายเดือนก่อน

    Thank you for the Great Video.

  • @protossid
    @protossid 9 หลายเดือนก่อน

    Thank you Sir, very informative video

  • @MarkSeager-dp2kg
    @MarkSeager-dp2kg 7 หลายเดือนก่อน

    Can TDR be effective for underground non shielded power cables? For example, could a TDR measurement be performed on a PV source circuit, containing 2 500kcmil conductors run underground in conduit?

    • @ProtecEquipmentResources
      @ProtecEquipmentResources  7 หลายเดือนก่อน

      Hi Mark, thanks for your question. From Bret Hammonds: The technology behind TDRs is ideally suited for two conductors separated by a homogeneous (equivalent) insulation such as what you would find in either a shielded cable or one with a concentric neutral. The case that you have presented is less than ideal for use of a TDR since it is only able to detect very significant changes in impedance such as an open circuit or a short circuit.
      Having said that, it might be possible under some very unique circumstances for a TDR to be helpful in finding a fault in such a situation as what you have described. Those circumstances would include:
      - Using either a grounded conductive conduit for your return or the two separate cables that are running through the conduit. In either case you would NOT have a homogeneous (equivalent) impedance throughout the distance of the cable run.
      AND
      - A significant fault that is either completely open circuited ( ~ ∞ ohms) or a very low impedance (for all practical purposes considered to be a short circuit between the conductors.)
      If the fault is a high impedance fault, which is often the case, then the TDR will NOT be able to see the fault without being integrated into a more elaborately featured cable fault locating system.