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Generator Selection

The document summarizes the electrical load details and sizing calculations for a generator. It includes 5 loads with details like wattage, power factor, and starting power factor. It calculates the total full load and starting load in KW and KVA. It then determines the minimum generator size as 333.92 KVA to meet the starting load requirements with 20% future expansion capacity. It lists standard generator ratings that could be selected.

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nidhin mohan
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48 views2 pages

Generator Selection

The document summarizes the electrical load details and sizing calculations for a generator. It includes 5 loads with details like wattage, power factor, and starting power factor. It calculates the total full load and starting load in KW and KVA. It then determines the minimum generator size as 333.92 KVA to meet the starting load requirements with 20% future expansion capacity. It lists standard generator ratings that could be selected.

Uploaded by

nidhin mohan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Full Load

Watts per Strating Running


Load Details No Load DF PF SCM PF PF
Load 1 CFL 4 80 0.8 0.8 1 0.8 0.8
Load 2 AC 2 3000 1 0.8 1.6 0.8 0.8
Load 3 Halogen bulb 2 500 0.8 0.7 1.6 0.8 0.8
Load 4 Motor with Y-Δ starter 1 10000 0.8 0.7 4 0.7 0.8
Load 5 Motor with Soft starter 1 120000 0.8 0.7 2 0.7 0.8
Total

Size of Generator in KVA = Starting KVA * Future Expansion*


333.92 1.1

293.8496

Types of Loads SCM


Linear Load 1
Non Linear Load (UPS, Inverter, 1.6
Computer, Ballast)
DOL Starter 6
Y-Δ Starter 4
Auto Tr Starter 3
Soft Starter 2
VFD Starter 1.5
Full Load Condition Starting Condition

Starting
KW
Full Load Full Load KW(total
KW(total current in no*Full Starting
no*Full Full Load A= (Full load KVA= Starting
load KVA= Full load watts per Starting Current =
watts per Load KW/ KVA/ load* KW/ Full Load
load*DF/ Running Viltage)* DF*SCM/ Starting Current *
1000 PF 1000 1000 PF SCM
0.256 0.32 1.391304 0.256 0.32 1.391304
6 7.5 32.6087 9.6 12 52.17391
0.8 1 4.347826 1.28 1.6 6.956522
8 10 43.47826 32 45.71429 173.913
96 120 161.312 192 274.2857 322.624
Total 138.82 243.1381 333.92 557.0588

Future Expansion* Average Use


1.1 0.8

Standered Generator Ratings


1 2 4 6 8
10 25 3 50 63
75 100 132 160 200
225 320 400 500 630
750 1000 1250 1450 1500
1600 1800 2000 2500 3000
3500 4000 4500 5000

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