Secondly is the pre location of fault wherein this was used to determine the

Secondly is the pre location of fault wherein this

This preview shows page 52 - 55 out of 56 pages.

Secondly is the pre-location of fault wherein this was used to determine the fault distance which uses two methods: pulse reflection method and the transient method. A pulse reflection method uses a pulse induced at the starting end of the cable which reaches the cable fault with a speed of v/2 and then is reflected back toward the starting end of the cable. The elapsed time multiplied by the diffusion speed v/2 gives the distance to the source of the fault. On the other hand, transient method uses a breakdown that is triggered at the cable fault. This yielded a low resistance short circuit for a few milliseconds. This in turn produces two travelling waves diffusing in opposite directions. These waves are reflected at the cable ends so that they then travel toward each other again in the direction of the cable fault. The waves are unable to pass the fault because of the arc produced by the short circuit, so they are therefore reflected back again as with the pulse reflection method, which due to the burning short circuit results in a reversal of polarity. With that, there are various ways to decouple and analyze these transients. Route tracing and pinpointing will then be used to determine where the fault cable lies and determining its exact position. Thus, knowing its exact location precedes to then identifying the faulty cable in order to replace it at the site itself. PE4| Group 5_5EEB
Image of page 52
UNIVERSITY OF SANTO TOMAS FACULTY OF ENGINEERING España, Manila PE4| Group 5_5EEB
Image of page 53
UNIVERSITY OF SANTO TOMAS FACULTY OF ENGINEERING España, Manila References : BICCCables, Electric Cables HANDBOOK Third Edition Online Electrical, Paper- Insulated Cables With its Construction, Retrieved from: Online Electrical, MV Paper- Insulated and Polymetric Cables, Retrieved from: Online Electrical, Design and Construction of Polymeric Cables, Retrieved from: Circuit Globe, Oil Filled Cables, Retrieved from: Britannica, Polymer, Retrieved from: The Electrical Inspector, Introduction to Conductor Inspection, Retrieved from: Nktcables, High Voltage Cable Systems, Retrieved from: 0kV___Brochure.pdf Factors-Affecting-Current-Ratings-for-Underground-and-Air-Cables - Underground-and-Air-Cables-?fbclid=IwAR3m8JBkUFDlLPNFgr7- qtUgjyXSrd8P_h0AXtQpTm9EICS_aQHWnyUEeTY Paper Polypropylene Laminated Cables , retrieved from: Eland cables,What are the benefits of XLPE insulated cables? , Retrieved from: - insulated-cables Dielectric Loss in Cables, retrieved from: - loss-in-cables Water cooling high voltage cables | How it works, Retrieved from: Underground Power
Image of page 54
Image of page 55

You've reached the end of your free preview.

Want to read all 56 pages?

  • Spring '18
  • Kenneth Sinson
  • UNIVERSITY OF SANTO TOMAS, power cable

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture