Exterior transformer substations - Import export

The compact transformer substations provide connections between industrial or residential consumers and the medium voltage network. Electroalfa produces prefab transformation stations of the MT/JT type Alfa Power, in a varied range of types and sizes, in standard production, but also derived products, adapted to the required application.To meet the market’s demands we design compact transformer prefabricated substations with concrete or metal enclosures with standard ranges from 160kVA to 1600 kVA (upon request, up to 2500KVA) with indoor or outdoor access.

Substations are transformer or distribution centers made of sheet steel in desired dimensions. They are suitable for use of all types of MV switchgears and LV panels. They are manufactured in the requirement number of sections and doors according to the project design. Strong construction made of sheet steel and profiles is painted with electrostatic powder paint or liquid paint for high corrosion resistance. In order to prevent the strong solar radiation in hot summer, the shell can be equipped with heat insulation material with low thermal conductivity, the most used fillers are: rock wool board, polystyrene foam, etc. Modular design in requested depth, width and length, in average 4 times lighter than a concrete version along with easy transport and commissioning are just some of the advantages of this solution. Compact substations are suitable for residential quarters, urban public utilities, renewable power plants, power distribution etc

(1)high voltage room: Rated frequency:50HZ rated voltage:10 KV Max working voltage:12 KV Rated current:630 A Transfer current:1750 A Take over current:3150 A Rated short-time withstand current:20 KA Rated peak with stand current:50 KA power-frequency withstand voltage: -line-to-line and ine-to-ground:42KV -fracture:48KV lightning impulse: -line-to-line and ine-to-ground:75KV -fracture:85KV Rated short-circuit breaking current :31.5KA transformer capacity:2500KVA (2)voltage transformer: rated voltage:10 KV rated capacity:50-600 KVA tapping range:±2×2.5%、±5% connection symbol:Yyn0、Dyn11 impedance voltage:4.5V (3)low voltage room: rated voltage:220、380 KV rated current of main circuit :50～4000 A branch circuit:5～800 A rated short-time withstand current of main circuit :50 KA rated peak with stand current of main circuit:63 KA (4)Shell: IP :IP33 Noise:≤50 dB temperature rise:10K

(1)Configuration list: -Rated capacity of transformer（KVA）:50,80,100,125,160,200,250,315, 400,500,630,800,1000,1250,1600 -Rated current of low voltage(A）：72.2 /115.5/14.3/180.4/230.9/288.7 /360.8/454.7/577.4/721.7/909.3/1157.7/1443.4/1804.2/2309.4 -Rated current of high voltage(A)：2.89/4.62/5.77/7.22/9.24/11.55/14.43/ 18.19/23.09/28.87/36.37/46.19/57.74/72.17/92.38 -Plug-in fuse capacity(A)：4 or 6 /6/6 or10/10/15/15/20/25/25/40/40/63/ 63 or 80/80 or 100/125 -Backup fuse capacity(A):50 /50/50/50/63/63/80/100/100/125/125/ 150 or 175/175/175 or 100/ 150 -Main switch capacity of low voltage (A):100/160/200/250/315/400/500/630/ 800/1000/1250/1600/2000/2500/3000 (2)series oil immersed transformer performances of 10 kV Pre-installed transformer substation: -Rated capacity（KVA）:30/50/63/80/100/125/160/200/250/315400/500/ 630/8001000/1250/1600 -High Voltage（KV）:6/6.3/10/10.5 -Tapping range of high voltage（%):±5 or±2x2.5 -Low Voltage（KV）:0.4