Monday, January 04, 2010

Overhead(O/H) Power Distribution

Power Distribution is the last part of the delivery of electrical energy to consumers. It is normally done in low voltage, for example 400V/230V denoting 3phase/1phase. In some cases this can be, medium voltages like 11kV/ 33kV.

This can be done by conductors, either drawn OverHead (O/H conductors) or buried underground (Insulated cables). Each have their own advantages and drawbacks. for e.g.: In densely populated areas - undergroung cables are preferred. At the same time, cables are costly than O/H conductors. In addition, faultfinding is a cumbersome process in underground cables. On the other hand, O/H cables are mostly vulnerable to lightning surges, bad weather conditions etc.


Here we will mostly consider about O/H power distribution and its main components:

It mainly consists of Line supports (poles), O/H conductors, Insulators, Earth wire, small distribution transformers etc.


Insulators:
Used to protect the phase conductors reaching the grounded terminals, and as supporting elements. those are classified as:

1. Strain

Image from: www.made-in-china.com
2. Pin

Image from: www.made-in-china.com
3. Post

Image from: www.made-in-china.com
4. Suspension

Image from: www.made-in-china.com

5. Shackle


Image from: www.made-in-china.com

Poles:
1. Steel poles



2. Wooden poles


3. Reinforced concrete (RC) poles



O/H Conductors:


1. All aluminium conductors (AAC)


2. All aluminum alloy conductors (AAAC)


3. Aluminum conductor, Steel reinforced (ACSR)


4. Arial bundled cables (ABC)



3 comments:

Unknown said...

Nice pics of Electric Power Engineering and Acsr conductors and accessories.

Ninie Rawi said...

hey there,

your picture for ACSR is not ACSR. it is carbon core conductor

ppanday2282@gmail.com said...

Nice article
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