Transformer
LV,
415V, Current Rating of Transformer = KVA x 1.3
Short
Circuit Current of T.C /Generator = Current Rating / % Impedance
No
Load Current of Transformer =< 2% of Transformer Rated current
Capacitor
Current (Ic) = KVAR / 1.732xVolt (Phase-Phase)
The
diversity they would apply to apartments is around 60%
Maximum
HT (11kV) connected load will be around 4.5MVA per circuit.
Earth
pits per transformer: 2Nos. for body and 2Nos. for neutral earthing.
Clearances,
approx.1000mm around TC allow for transformer movement for replacement.
Single Phase Transformer
5KVA,
10KVA, 15KVA, 25KVA, 37.5KVA, 50KVA, 75KVA, 100KVA, 167KVA, 250KVA, 333KVA,
500KVA, 833KVA, 1.25KVA, 1.66KVA, 2.5KVA, 3.33KVA, 5.0KVA, 6.6KVA, 8.3KVA,
10.0KVA, 12.5KVA, 16.6KVA, 20.8KVA, 25.0KVA, 33.33KVA.
Three Phase Transformer
3KVA,
5KVA, 9KVA, 15KVA, 30KVA, 45KVA, 75KVA, 112.5KVA, 150KVA, 225KVA, 300KVA,
500KVA, 750KVA, 1MVA, 1.5MVA, 2MVA, 2.5MVA, 3.7MVA, 5MVA, 7.5MVA, 10MVA, 12MVA,
15MVA, 20MVA, 25MVA, 30MVA, 37.5MVA, 50MVA, 60MVA, 75MVA, 100MVA
Note:
-
Transformer up to 25 KVA can be mounted direct on pole.
- Transformer from 25 KVA to 250KVA can be
mounted either on “H” frame of plinth.
- Transformer above 250 KVA can be mounted
plinth only.
Impedance of transformer – As per
IS 2026)
>MVA %
Impedance
<
1 MVA 5%
1
MVA to 2.5 MVA 6%
2.5
MVA to 5 MVA 7%
5
MVA to 7 MVA 8%
7
MVA to 12 MVA 9%
12
MVA to 30 MVA 10%
>
30 MVA 12.5%
further reading: a practical guide to cable installation and tool box talk
further reading: a practical guide to cable installation and tool box talk
Very Informative! This blog is great source of information which is very useful for me. Thank you very much for sharing this!
ReplyDeletePower transformers in India | Wire harness manufacturer in India
Creating experts,A leading career development organization provides Real time training in SAP Success Factors,SAP MM, SAP SD, SAP ABAP, SAP BASIS,SAP BASIS, SAP FICO,with live examples by corporate Experts.
ReplyDeletewww.thecreatingexperts.com (Best SAP training institute in chennai with placement assistance)
SAP Success Factor,SAP MM Training in chennai Vadapalani ECR velachery Tambaram chromepet guindy and t.nagar.