The 5000 kVA 33kV Three-Phase Oil-Immersed Power Transformer is a three-phase power transformer for substation, heavy industrial and utility duty where capacity and network conditions are specified more closely than for standard distribution units. Ratings are configured per the technical parameters below and confirmed against your system data.
Cooling method, vector group, impedance and tap range are engineered against your load profile and network parameters. Each unit is routine-tested before dispatch, and engineering support is available from enquiry through to commissioning.
Technical Parameters & Ratings
| Rated Capacity | 5000 kVA |
|---|---|
| Primary Voltage (U1) | 33,000 V (33 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) | 87.48 A |
| Secondary Current (I2) | 6956.1 A |
| Guaranteed No-Load Loss (P0) | 4100 W |
| Guaranteed Load Loss (Pk at 75°C) | 31000 W |
| Short-Circuit Impedance (Uk) | 5.5% |
| HV Insulation Level | LI 170 / AC 70 (33kV Class) |
| Temperature Rise Limits | Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient) |
| Creepage Distance | ≥ 31 mm/kV (Outdoor Tropicalized Porcelain) |
| Core & Coil Weight | 6800 kg |
| Insulating Oil Weight | 3900 kg |
| Total Assembled Weight | 13800 kg |
| Overall Footprint (L×W×H) | 2750 mm × 1750 mm × 2800 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 substations
- Industrial plants and heavy-load facilities
- Infrastructure and public utility projects
- Regional transmission and distribution networks
- Commercial and industrial power systems
Key Features
- 5000 kVA rated capacity for medium- to large-scale transmission and distribution projects
- high-voltage design suitable for substations and industrial power systems
- Oil-immersed structure for stable cooling performance and dependable long-term operation
- Available with copper or aluminum windings according to project and budget requirements
- Suitable for IEC-based specifications and project-oriented customization
- Outdoor installation design with configurable accessories and protection devices
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
Typical Applications
The 5000 kVA 33kV Three-Phase Oil-Immersed Power Transformer is specified in projects such as:
- Substation step-up and step-down duty
- Heavy industrial process power supply
- Generator step-up for small plant and embedded generation
- Grid interconnection where impedances are specified
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 5000 kVA 33kV Three-Phase Oil-Immersed Power 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 duty is this power transformer built for?
It is intended for transmission, substation and heavy industrial duty where capacity and network conditions are specified more closely than for standard distribution units.
Which ratings are available?
Capacity, voltage, vector group and impedance are confirmed against your system data rather than a fixed list. Share your network parameters and we will return a configuration proposal.
How is cooling selected?
Cooling method (ONAN, ONAF, OFAF or OFWF) is chosen against rated capacity, load profile, ambient conditions and installation. We will recommend an option once we have your operating data.
Which standards does it comply with?
Power transformers are designed to IEC 60076 and the GB equivalent. Where your project specifies ANSI/IEEE or another standard, confirm the applicable clauses before production.
What do you need to provide a quotation?
Rated capacity, primary and secondary voltage, frequency, vector group, impedance, cooling requirement, altitude and ambient conditions, quantity.
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