Direct connection with earth for lightning protective apparatus To provide an earth to stabilize  battery potential to t

Direct connection with earth for lightning protective apparatus To provide an earth to stabilize battery potential to t PowerPoint PPT Presentation


  • 85 Views
  • Uploaded on
  • Presentation posted in: General

Purpose of earthing . Service System Eartha. Switching equipment.B. Transmission equipmentC. Measuring equipmentD. AC power supplyE. Corrosion mitigation.Protective system earth a.Protection against high voltage b.Protection against high current.. Requirement of service system earth. It sh

Download Presentation

Direct connection with earth for lightning protective apparatus To provide an earth to stabilize battery potential to t

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


1. Direct connection with earth for lightning protective apparatus To provide an earth to stabilize battery potential to the line and equipment earth. Single wire switching to reduce fuses .Positive bus bars are need not have an insulate.

2. Purpose of earthing Service System Earth a. Switching equipment. B. Transmission equipment C. Measuring equipment D. AC power supply E. Corrosion mitigation. Protective system earth a.Protection against high voltage b.Protection against high current.

3. Requirement of service system earth It should have low resistance to DC It should carry high current with out heating and burning on it It should remain same resistance in all seasons It enable sufficient current flow to earth

4. Type of earth Individual earth Common earth

5. Design Low value of surge impedance Low resistance Lightning earth Close to the power plant No Sharp bend and coil etc Service earth Service earth carries the current to the earth ( it discharge the current to the earth)

6. DC 1 amp flows on a steel wire consumes 10 kg of steel per annum 25ma 20 year consumes 20kg of steel

7. Types Spike earth electrode System Lead stripe electrode system Earth plate electrode system

8. SPIKE earth 275,375 dia mm

9. Resistance of a single pipe log 4L R= r --- -- -1 2L a r= Soil resistively L= length of the pipe in cm a= radius of the pipe in cm

10. Earth plate electrode system

  • Login