The 150 kVA 13.8kV Three-Phase Oil-Immersed Distribution Transformer is a three-phase oil-immersed distribution transformer for step-down duty in utility networks, industrial plants and infrastructure projects. Capacity, voltage, vector group and impedance are confirmed against your network data, with the standard configuration shown in the technical parameters below.
Copper or aluminium windings, amorphous alloy cores and on-load tap changers are available where the project calls for them. Each unit is routine-tested in the factory and dispatched with test reports, and installation or commissioning support can be arranged for project deliveries.
Technical Parameters & Ratings
| Rated Capacity | 150 kVA |
|---|---|
| Primary Voltage (U1) | 13,800 V (13.8 kV) |
| Secondary Voltage (U2) | 415 V / 240 V (3-Phase 4-Wire) |
| Vector Group | Dyn11 |
| Rated Frequency | 50 Hz |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Primary Current (I1) | 0.87 A |
| Secondary Current (I2) | 69.6 A |
| Guaranteed No-Load Loss (P0) | 130 W |
| Guaranteed Load Loss (Pk at 75°C) | 850 W |
| Short-Circuit Impedance (Uk) | 4.0% |
| HV Insulation Level | LI 75 / AC 35 (11kV Class) |
| Temperature Rise Limits | Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient) |
| Creepage Distance | ≥ 31 mm/kV (Outdoor Tropicalized Porcelain) |
| Core & Coil Weight | 230 kg |
| Insulating Oil Weight | 160 kg |
| Total Assembled Weight | 450 kg |
| Overall Footprint (L×W×H) | 950 mm × 650 mm × 1200 mm |
| Governing Standards | IEC 60076, BS 171, SON NIS, NERC Code |
Technical Highlights
- This product combines dependable transformer platform design, flexible project configuration, and practical export-oriented construction. It is suitable for applications requiring stable electrical performance, configurable voltage ratios, outdoor durability, and documentation support for international project supply.
Application Scenarios
- Utility distribution networks
- Industrial plants and workshops
- Commercial buildings and mixed-use developments
- Public infrastructure projects
- Regional and municipal power distribution systems
Key Features
- 1150 kVA rated capacity for distribution network and industrial feeder applications
- class design suitable for utility and regional power distribution systems
- Oil-immersed structure for stable thermal performance and dependable outdoor operation
- Available with copper or aluminum windings according to project and budget requirements
- Supports IEC-based specifications and project-oriented voltage configuration
- Configured for long service life, practical maintenance, and export project supply
Optional Configurations
- Low-voltage side rating and voltage ratio
- Frequency: 50 Hz or 60 Hz
- Vector group and tapping range
- Copper or aluminum winding
- Cooling method, accessory package, and monitoring option
- Tank structure, coating system, and special environmental adaptation
- Color, nameplate language, and document package
- Ambient temperature, altitude, and installation condition adaptation
Frequently Asked Questions
What applications does the 150 kVA Oil-Immersed Distribution Transformer suit?
It is built for utility, industrial and commercial distribution networks. This unit is configured with 13.8 kV primary and 415 V secondary and ONAN cooling.
Is 150 kVA Oil-Immersed Distribution Transformer the only rating you can build?
Yes. Ratings are set from your project, not from a fixed catalogue. Send the single-line diagram and load list and we size the windings, tap range, cooling and protection to what the site actually needs. Vector group, frequency and terminal arrangement are confirmed on the drawing before anything is built.
How do you confirm the standard for a oil-immersed distribution transformer?
The applicable standard and the clause set are agreed against your project specification before production starts. Where a project names IEC 60076 for the transformer or IEC 62271-202 for a prefabricated substation, we work to those clauses and ship the routine test report with the unit.
Does it need a special room or foundation?
Cooling is ONAN. Protection and monitoring are selected to the single-line diagram: winding and oil temperature indication, Buchholz relay or pressure relief where the design calls for it, and surge arresters on the terminals. Indoor or outdoor placement, enclosure rating and foundation details are fixed with your site conditions.
How do we start an enquiry for a oil-immersed distribution transformer?
The single-line diagram, the load list, the system voltage and frequency, and the site conditions that affect the design – altitude, ambient temperature range, indoor or outdoor, enclosure rating. With that we come back with a drawing and a price. If you only have a rating in mind, send that and we will work the rest out with you.
Typical Applications
The 150 kVA 13.8kV Three-Phase Oil-Immersed Distribution Transformer is specified in projects such as:
- Utility and industrial distribution step-down duty
- Solar and wind plant auxiliary and collector transformers
- Infrastructure projects: rail, metro, airports, ports
- Commercial and residential distribution substations
- Outdoor pole, pad or kiosk mounted installations
Manufacturing & Factory Testing
Transformer manufacturing at our works, with quality control checkpoints through production and complete routine testing before dispatch:
- Core cutting and winding with controlled process parameters
- Vacuum drying and oil filling (oil types) or epoxy casting (dry types)
- Routine tests: winding resistance, ratio and polarity, no-load and load loss, applied and induced voltage
- Type test certificates from accredited laboratories available on request
Technical Drawing
Delivery, Warranty & OEM Support
- Typical lead time: 30 days from order confirmation for standard ratings; custom configurations are confirmed at order stage
- Warranty: 2 years, with technical support available throughout the service life
- OEM / ODM supported: private labelling, nameplate language and document packages
- Seaworthy export packing; documentation set includes routine test reports, installation manuals and general arrangement drawings
Need a quotation for the 150 kVA 13.8kV Three-Phase Oil-Immersed Distribution Transformer? Send your single line diagram and ratings to our sales team and our engineers will confirm the configuration, lead time and price.
Frequently Asked Questions
What applications does the 150 kVA Oil-Immersed Distribution Transformer suit?
It is built for utility, industrial and commercial distribution networks. This unit is configured with 13.8 kV primary and 415 V secondary and ONAN cooling.
Is 150 kVA Oil-Immersed Distribution Transformer the only rating you can build?
Yes. Ratings are set from your project, not from a fixed catalogue. Send the single-line diagram and load list and we size the windings, tap range, cooling and protection to what the site actually needs. Vector group, frequency and terminal arrangement are confirmed on the drawing before anything is built.
How do you confirm the standard for a oil-immersed distribution transformer?
The applicable standard and the clause set are agreed against your project specification before production starts. Where a project names IEC 60076 for the transformer or IEC 62271-202 for a prefabricated substation, we work to those clauses and ship the routine test report with the unit.
Does it need a special room or foundation?
Cooling is ONAN. Protection and monitoring are selected to the single-line diagram: winding and oil temperature indication, Buchholz relay or pressure relief where the design calls for it, and surge arresters on the terminals. Indoor or outdoor placement, enclosure rating and foundation details are fixed with your site conditions.
How do we start an enquiry for a oil-immersed distribution transformer?
The single-line diagram, the load list, the system voltage and frequency, and the site conditions that affect the design – altitude, ambient temperature range, indoor or outdoor, enclosure rating. With that we come back with a drawing and a price. If you only have a rating in mind, send that and we will work the rest out with you.
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