Civicon Limited will do the roads at LTWP for Ksh.3.2 Billion

News just in confirm that Civicon Limited, a lading construction company has won the contract for the construction of access roads in the Lake Turkana Wind Farm and also a roads to the station.

The contract which is worth Ksh. 3.2 Billion will entail the construction of 109km on-site road network at another 204km access road. These roads will be built to gravel standards and should provide the much needed capacity to handle the excruciating weight of the mighty Vestas Wind Turbines that shall be brought to the site.


The project will last 15Months by which the turbines will be ready for mounting.

Extra High Voltage Systems - 400kV Lines

Nominal Voltage                      400kV
Cicuits per phase                     1
Sub-conductors per phase        2
Span                                      400m
Conductor Name and Size       Moose,54/3.53mm Alluminium  7/3.53mm Steel
Sub-conductor Diameter          3.177cm
Bundle Configuration                Horizontal
Bundle Spacing                       450mm
Interphase Spacing                   11m
Condutor Configuration            Horizontal
Resistance per phase per km at 20degrees 0.0274Ohm
Inductive Reactance per phase per km              0.3321Ohm
Shunt Admittance per phase per km                  3.2983*10-6
Surge Impedance                    282Ohm
Surge Impedance Loading        505MW
Current Carying capacity at 40degrees ambient temperature 900A
Ground Wire                           2Number,7/3.66mm Galvanised Steel
Ground wire height at tower                30.4m
Tower height                           30.4m
Conductor Height at tower           20.75m
Conductor sag at 0degrees           8.39m
Ground wire sag at 0degrees               6.654m
Shielding angle                           10degrees
Suspension string                   23dics,225*145mm
Impulse Flashover voltage                   1550kV

Examples:Sultanpur-Lucknow Line, Obra-kanput Line, Kanpur-Maradnagar Line.

50kVA PMTx Substation Transformer

Name : 50kVA Pole Mounted Substation Transformer
Rating: 50kVA
Cooling: Oil Cooled
Application: Commercial,Heavy Residential,Farmhold

This  type of transformer is mainly used for Step-Down purposes of voltages in the range of 11kV~415/240V.

Corona

Have you ever wondered why high voltage power lines buzz (zszszs sound)? Its because they are producing corona which is interacting with the surrounding air.
 Corona is the process by which current, perhaps sustained, develops from an electrode with a high potential in a neutral fluid, usually air, by ionizing that fluid so as to create plasma around the electrode. The ions generated eventually pass charge to nearby areas of lower potential, or recombine to form neutral gas molecules. Plasma is a fourth state of matter (after solid, liquid, and gas). It is like a gas or liquid, but molecules are separated into atoms, and the outer electrons are stripped off and are freed into the plasma. In comparison, the sun is essentially a big ball of very hot plasma.

Power System Network

A detailed explanation of the conversion and distribution of electric energy from the power station to consumer units.This post describes how electric energy moves from the power generating station through conductors of various sizes to consumers premises.To minimize losses and for economical reasons, electrical energy has to be converted into different magnitudes during transmission and distribution until the consumer load.