Transformer Substations

Customized 1250 kVA 20/0.4 kV European Box-type Substation

A customizable three-phase European-style box substation rated 1250 kVA with a 20 kV / 0.4 kV voltage ratio for medium-to-low-voltage distribution.

A customizable three-phase European-style box substation rated 1250 kVA with a 20 kV / 0.4 kV voltage ratio for medium-to-low-voltage distribution. The integrated steel enclosure combines the high-voltage room, transformer room and low-voltage room into a single ventilated cabinet, and can be tailored to project-specific layout and capacity requirements.

  • Customized design to suit project layout, capacity and voltage requirements
  • 1250 kVA rating, 20 kV to 0.4 kV transformation
  • Integrated three-compartment layout (HV / Transformer / LV)
  • Perforated and louvred doors for efficient natural ventilation
  • Copper or aluminium windings; IEC / GB compliant; ISO9001 certified
Rated Capacity1250 kVA
Frequency50 / 60 Hz
PhaseThree Phase
Winding MaterialCopper / Aluminium
StandardIEC / GB
CertificationISO9001
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Lead time typically 25–45 days after drawing approval · FAT welcome · Ships worldwide (EXW / FOB / CIF / DAP)

Technical specifications

Specifications of Customized 1250 kVA 20/0.4 kV European Box-type Substation
ParameterValue
TypeCompact Box Substation
Rated Capacity1250 kVA
Voltage Ratio20 kV / 0.4 kV
PhaseThree Phase
Frequency50 / 60 Hz
Winding MaterialCopper / Aluminium
Coil StructureRound Coil
Vector GroupDyn11 / Yyn0
StandardIEC / GB
CertificationISO9001
Warranty2 Years
PackagingWooden Case
Customized 1250 kVA 20/0.4 kV European Box-type Substation — specification and nameplate detail
Specification and nameplate detail

Specifications are based on the standard configuration. Final ratings, dimensions, materials and packaging are confirmed on the approved drawing and order confirmation.

Features and construction

  • Compartmentalised HV, transformer and LV rooms for safe, organised operation
  • Mix of perforated vents and louvre panels for balanced airflow and cooling
  • Sheet-steel enclosure with overhanging flat roof for weather protection
  • Mounted on a rigid base frame for stable outdoor installation
Customized 1250 kVA 20/0.4 kV European Box-type Substation — construction and materials detail
Construction and materials detail
Customized 1250 kVA 20/0.4 kV European Box-type Substation — internal structure
Internal structure
Customized 1250 kVA 20/0.4 kV European Box-type Substation — workmanship detail
Workmanship detail
Customized 1250 kVA 20/0.4 kV European Box-type Substation — safety and protection features
Safety and protection features

Typical applications

Industrial parks, commercial and residential developments, municipal distribution, and utility medium-voltage networks.

Customized 1250 kVA 20/0.4 kV European Box-type Substation — typical application
Typical application

Customisation options

Enclosure colour, capacity, voltage ratio, winding material (copper / aluminium), compartment layout and dimensions available on request.

Customized 1250 kVA 20/0.4 kV European Box-type Substation — dimensions and layout
Dimensions and layout
Customized 1250 kVA 20/0.4 kV European Box-type Substation — customisation options
Customisation options

Ordering information

Built to order per confirmed specifications. Please provide capacity, voltage ratio and site requirements when enquiring.

Product images are illustrative renders for marketing reference; final delivered product is built to order per confirmed specifications.

Standards and quality

Manufactured under an ISO 9001, ISO 14001 and ISO 45001 certified management system. Designs follow the IEC 60076 / IEC 62271 series as applicable, with ANSI/IEEE, GB and GOST variants available. Every unit passes routine testing before dispatch; type tests and customer or third-party witnessed factory acceptance tests can be arranged.

Frequently asked questions

What is the rated capacity of the Customized 1250 kVA 20/0.4 kV European Box-type Substation?

The standard configuration is rated 1250 kVA at 50 / 60 Hz. Other ratings in the same family can be built to order — tell us the load and we will confirm the nearest standard rating.

Which standards and certifications apply?

The product is designed to IEC / GB. MARS operates an ISO 9001 / 14001 / 45001 certified factory and holds CE (ECM), UDEM, EAC and CQC approvals; every unit is routine-tested before dispatch and type or witnessed tests can be arranged.

Can this product be customised?

Enclosure colour, capacity, voltage ratio, winding material (copper / aluminium), compartment layout and dimensions available on request.

What is the lead time and how is it shipped?

Typical lead time is 25–45 days after drawing approval for distribution equipment and 60–90 days for power transformers and containerised systems. Shipment is by sea from Shanghai on EXW, FOB, CIF or DAP terms with a full document pack.

Enquire about this product

Tell us the rating, voltage ratio, frequency, quantity and destination. A MARS engineer replies with a technical proposal and quotation within one working day.

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