Product Overview
Sealed Outdoor Pad-Mounted Transformer from a Professional Factory in China
A compact, sealed, outdoor transformer with copper windings and silicon-steel cores, the pad-mounted three-phase transformer is used to transform medium voltage to low voltage in urban grids, industrial zones, and commercial areas. It has IP54 protection and effective conversion of electric energy.
Applications & circuit protection
This transformer is suitable for low-voltage and medium-voltage power engineering according to the need for compact outdoor but tamper-proof equipment.
- Urban distribution: Supply for living communities.
- Industrial areas: Supply for factories and plants.
- Commercial areas: Shopping malls and service centers.
- Utility companies: Above-ground distribution.
Construction & operating reliability
Copper coils, a silicon-steel core and a sealed IP54 enclosure guarantee efficient conversion, safety and long lifespan in outdoor environment.
- Compact, sealed outdoor housing (IP54).
- Copper coils for negligible losses.
- Silicon-steel core for high effectiveness.
- High tolerance to short circuit situations.
- Ideal for urban, industrial and commercial electrical systems.
Technical Parameter
| Parameter | Value |
| Rated capacity range | 30-2500 kVA |
| Voltage combination (HV) | 6 / 6.3 / 10 / 10.5 / 11 kV |
| Tap range | ±5% / ±2×2.5% |
| Voltage (LV) | 0.4 / 0.69 kV |
| Connection group | Yyn0 / Dyn11 / Yzn11 |
| No-load loss (typical range) | 100-2400 W |
| Load loss (typical range) | 630-24000 W |
| No-load current (typical range) | 0.5-2.3% |
| Short-circuit impedance | 4% |
| Type | Pad-mounted, three-phase, oil-immersed |
| Power rating | 50 – 2500 kVA |
| Primary voltage | 11 / 22 / 33 kV |
| Secondary voltage | 400 / 230 V |
| Impedance voltage | 4% – 6% (IEC 60076) |
| Cooling method | ONAN |
| Protection level | IP54 |
| Standard | IEC 60076 / ANSI |
Box Substation Cost & Factory Quote
The cost of a Pad-Mounted Transformer is determined by kVA rating, HV/LV switchgear arrangement, transformer category and different casing options. Please send us the one-line diagram as well as the number of transformers required to receive a cost estimate from us.
- The quotation includes transformer, switchgear and LV panel.
- Customization with respect to colour and branding free of charge.
- Shipping options: FOB/CIF/DDP
Substation Wiring & Site Connection
The entire unit is delivered with prepped HV and LV cable entries and tested internal wiring. On site, connect the incoming MV cables, outgoing LV cables and earthing system together; factory pre-wiring means reduced installation time.
- At the factory, the internal wiring has been completed and tested
- HV/LV cable entries have been prepared in accordance with the drawings
- A point for earthing system connection has been provided
Compare Substation Options
Choose the configuration that matches your site:
| Feature | This Unit | Alternative |
| Capacity | As specified | Other kVA ratings available |
| HV/LV | Per single-line diagram | Custom configuration |
| Enclosure | IP43 / IP54 | Indoor or outdoor layout |
| Application | Distribution / renewables | Utility, industrial or solar/wind |
Export Markets & Country Compatibility
Whether it is about exporting complete substations to various projects in Asia, Africa, the Middle East, Latin America or the Pacific region, each unit is tailored to existing grid requirements, voltage class and installation standards of the country where it is to be installed.
Substation Dimensions, Weight & Delivery
Complete substation dimensions and weight depend on capacity and configuration. A typical 250-630 kVA unit is about 3000-5000 mm long, 1500-2500 mm wide and 1800-2600 mm high, shipped as one or several assembled sections. Overall dimensions, weight and lifting points are confirmed with the project drawings.
- Overall dimensions are confirmed with the project drawings.
- Sections designed for transport access.
- Lifting and site placement plan provided.
Standards & certifications
Following IEC 60076 and ANSI standards; this transformer equipment can be provided with testing results for project approval.
- Design standards followed: IEC 60076 / ANSI.
- Type and routine test results provided.
- IP54 water and dust protection certifications provided.
- Documentation and forms provided for certification process.
OEM & B2B supply support
Being a leading manufacturer of electric machinery, Subian Electric provides the electric utility companies with transformers and assistance by our services.
For exact capacity, voltage and type of transformer you wish to order, contact us by providing details of the necessary equipment with the quantity you want.
- Sample and technical drawings available.
- Flexible quantity for ordering.
- OEM/OEM services available.
- Custom marking and packaging.
Frequently Asked Questions
What is a pad-mounted transformer?
The pad-mounted transformer is mounted on the ground and is also an outdoor distribution transformer utilized in urban and commercial electricity transmission.
What ratings are available?
There are three ratings available ranging from 50kVA to 2500kVA with primary voltage rating of 11kV, 22kV, and 33kV.
What protection level does it offer?
Enclosure of the equipment offers IP54 class protection against dirt and water splash.
Do you provide test reports?
Yes, type test and routine test reports are provided for project approval and market certifications.
