3 PHASE DIESEL GENERATOR INSTALLATION

1.GENERATOR INSTALLATION :

In installation of generator first procedure is to calculate the load.
So now a day’s company ongoing project is to install the generator at Punjab College in different cities of Punjab.

Punjab College handed this project to Mechanics Engineering for installation the generator for their lab air conditioner.
So now it’s clear that our load is air-conditioned.
In different cities of Punjab, the labs in Punjab colleges vary from 5 to 10.So our load is different in different branches of Punjab colleges.
In a lab, there are 3 to 4 air-conditioned of 1, 1.5 and 2 ton.
So if we have 10 air-conditioned of 1.5 ton and 1 air-conditioned takes 10 ampere
then our load will be 10 *10=100A

GENERATOR RATING
As we have calculated our load and now our task is to select the generator of the desired rating.
100/3=33.33A
formula S=3*V*I
S=3*220*33.33
S=21.997kva=22kva
now as we operate our generator at 80% load so our generator rating will be
S=30kva…
We can also check the generator size by generator manufacturing company website they provide the facility to calculate the size of the generator online providing them the load information.

CABLE SIZE RATING 

For this we to look at the table of cable size versus current.
So for 33 ampere, we will use the cable 16 mm2
its max current rating is 70 ampere.

Its size also depends on length so u must consider it during installation

As
R =L/A…
R=resistance
L=length
A=area
from the above formula, it’s clear that resistance varies of a conductor according to length of the conductor.

CEMENTED BASE AND EARTHING.

We make the cemented base for generator installation so that it may placed at firm and balance level.  The base is also kept high from 1 to feet from the ground.
For grounding, we do a bore in the ground deep until water comes. We tie a 2 feet rod we grounding conductor and throw it in that bore and the other terminal of conductor wire is connected to the generator body. We make 2 bore 1 for the generator body and others for neutral connection.