Substations- low-voltage - 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

Nomex-Kapton -Nomex (NKN) tubes are stator slot liner insulators produced with a low thickness of only 0,16 mm without overlaps. This means an improved thermal management inside the stator slot, less overheating inside, higher torque and motor efficiency, more space for copper hairpins & I-Pins, improved dielectric strength. Reducing the thickness of slot insulator and improving dielectric & thermal insulation is a key stone to improve motor efficiency and performance in terms of: 1. Improving thermal conductivity and reducing thermal resistance 2. Reducing the temperature of the copper hairpin hotspot 3. By reducing the insulator volume because of a reduced thickness and lack of overlaps; this means that the amount of copper inside the slot can be increased, improving motor performance 4. Reducing phase resistance Nomex and Kapton are DuPont registered trademarks

-Rated Voltage(VAC): 400 -Rated Current(A):50/75/100/150/200/250 -Rated Capacity(kvar):±35/±52/±70/±104/±138/±173 -Input Voltage Range (VAC):400±20% -Rated Electrical Network Frequency (Hz):50±5% -Overload Current Multiples:1.2 -Working Efficiency:98.5 -Cooling Method:Forced Air Cooling -IP:IP44

-Rated voltage:380V -Rated insulation voltage:690V -1min power-frequency withstand voltage:2500V -Rated current:100A，200A，250A，315A，400A，500A，630A -Rated short-circuit breaking current:16、31.5、40、50kA -Shell protection level: IP33

-Rated insulation voltage: AC 660（1000）V -The rated power-frequency voltage -Main circuit :AC 380（660）V -Auxiliary circuit:AC 380、220、24V -DC:220、110V -Rated frequency:50（60）HZ -Horizontal bus rated current:≤4000A -Vertical bus rated current :1000A -Rated peak with stand current（ls):50（80）KA