Distribution Transformer Specs.

[EddyPach]

Does somebody know where I can find distribution transformer specs.? I imagine they woudl very widely from power transformer ones.
Greetings,

 

[SphincterBoy]

Just ask for these from Cooper Power Systems, or
go to their website at

http://www.cooperpower.com

Concerning distribrution transformers, has anyone
ever attended a transformer tear-down for either
pole or padmounted transformers? ABB used to sponser
these events.

Who makes the best distribution transformers? I have not really seen any difference between any of them (ABB slightly
better) but I would like to know how their cores compare.

 

[gmazumder]

Distribution Transformer: Conventional Distribution Transformer (500kVA - 2000kVA)
Product Specification Table For Distribution Transformer


Enquiry Form Type Copper wound distribution transformers are manufactured in accordance with IS 2026-1977, 3 phase, 50Hz. Oil Natural Air(ONAN)
Core Construction Cold rold grain oriented sheet steel(CRGO)
Vector group 11000 by 433 at no load HV or LV star connected to vector group Dyn11
Tappings on HV + or - 2.5% and + or - 5% by manually operated off circuit tapping switch
HV Termination 3 Pole, 1 Gland cable box for PILC cables or XLPL cable.
LV termination 3 Gland for 500 kVA-3 core cable
4 Gland for 750 kVA-3 core cable
6 Gland for 1000 kVA-3 core cable
18 Gland for 1000 kVA-single core cable
8 Gland for 1600 kVA-3 core cable
21 Gland for 2000 kVA-3 core cable
10 Gland for 2000 kVA-3 core cable
24 Gland for 2000 kVA-single core cable




Requirements


kVA Rating
no load voltages in volts
vector group reference
impedance voltage in %
frequency in Hz
tempreture rise 0C
altitude if above 1000 mt above M.S.L
tapping range in %
cable details viz.type, number, area, dia, etc.
standard to which the transformer is to be designed and manufactured.

 

[prc]

Distribution trf spec varies from country to country in finer details;
For example in American continent the following ANSI stds cover various types of Distribution trfs:
ANSI C57.12.20,21,22,23,24,25&26 Oil filled trfs
ANSI C57.12.50,51,52,55 Dry type trfs .
For Indian Sub continent ,CBIP stds cover detailed spec for distribution trfs.