High Voltage Cable Laying Method

Cable shall be tested both before removal from cable drums and on site with a 1 kv insulation tester 5kv for mv cables.

High voltage cable laying method.

All cables and ducts laid into cable trrench should be over protected by a cable protection cover or tape depending upon the highest voltage cable to be protected within the cable duct typically in the uk the following cable protection tapes and covers are used for lv mv and hv cables. Cable laying shall be started by rotating the drum in a direction recommended and marked side of the cable drum and cables are pulled accordingly. There are so many parameters to consider while the laying of these cables. This means that they have a full rated insulation system which will consist of insulation semi con layers and a metallic shield.

Installation of cable trench covers cable protection tiles. In a practical situation there are three main cable laying systems are used commonly for laying these under ground cables which are. Laying the cables must heed the following parameters. High voltage cables used by western power are normally un armouredsingle core xlpe insulated earthedscreen cables which may be bundled in twisted trefoil for three phase use.

Normally in the electrical system most of the high voltage cables are laid under the ground. Cables placement will take place mainly above ground in perforated ladder type cable trays. Low voltage cables are usually three core xlpe insulated with aconcentric wave wound. This method of laying underground cables is simple and cheap and is much favoured in modern practice in this method of laying underground cables a trench of about 1 5 metres deep and 45 cm wide is dug the trench is covered with a layer of fine sand of about 10 cm thickness and the cable is laid over this sand bed the sand prevents the entry of moisture from the ground and.

Insulation resistance of hv cable should be checked by using 5 kv megger after installation and before termination of cables and readings shall be submitted to the consultant. Temperature range of the cable bending radius of the cable maximum tension of the cable weight of the cable as well as storage and cutting. Method of installation laying of low voltage cable. No matter what method is used for lay ing cables must be segregate takin g into account the voltage level and function in order to avoid possible electro magnetic.

A high voltage cable hv cable is a cable used for electric power transmission at high voltage a cable includes a conductor and insulation cables are considered to be fully insulated.