Generator is a composite unit, which generates electricity. In case of electricity failure, generator provides backup electricity.
Important Components Of Diesel operated Generating Sets are : –
Load Calculations for deciding the capacity of a Generating set: –
Consider three buildings, of seven storeys each and every building having 2 bedroom apartments on each floor. The generator backup is given to the following appliances.
Calculations for the required load for each building are as follows: –
Electrical Points at
Lift & machine room
Pumps for Fire fighting
Load for Common lighting: –
. : Total load = 3 buildings x load/building + load for common lighting
= 3 x 13.7 KW + 4.56 KW
= 45.66 KW
Applying diversity factor = as 0.70, designed capacity load
= 0.7 x 45.60 KW
= 31.962 KW
The capacity of the Generator required for the above load is = 35 KVA.
Civil works involved in the installation of D.G. set : –
Commissioning of generator: –
Commissioning of D.G. set should be done in the presence of the representative of the manufacturer and the electrical contractor. Commissioning should be done as per the check list provided by the manufacturer.
Each and every instruction from this checklist should be followed.
The system should be run for a period specified by the consultant before the final inspection. After the final inspection, all the necessary rectifications should be done and recorded.
Periodic checks of D.G. set: –
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