The 6.6kV Custom Voltage Three-Phase Oil Distribution Transformer (1000kVA) 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 | 1000 kVA |
|---|---|
| Primary Voltage (U1) | 6,600 V (6.6 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) | 17.49 A |
| Secondary Current (I2) | 1391.2 A |
| Guaranteed No-Load Loss (P0) | 1150 W |
| Guaranteed Load Loss (Pk at 75°C) | 8100 W |
| Short-Circuit Impedance (Uk) | 4.5% |
| 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 | 1650 kg |
| Insulating Oil Weight | 920 kg |
| Total Assembled Weight | 3200 kg |
| Overall Footprint (L×W×H) | 1650 mm × 1050 mm × 1750 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
- Designed for electrical control, automation, and load-side switching functions
- Configurable internal component arrangement according to process and feeder requirements
- Supports communication, metering, and interface options for smart plant integration
- Cabinet construction suitable for industrial and infrastructure environments
- Project-oriented documentation, labeling, and wiring scheme support available
- Suitable for export supply and customized control-package delivery
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 is this transformer used for?
It is intended for outdoor and utility distribution duty: voltage step-down for industrial plants, infrastructure projects and distribution networks. Share your network data and we will confirm the configuration.
Copper or aluminium windings – which should I choose?
Copper gives lower losses and a smaller footprint at higher cost; aluminium reduces initial cost and weight. The right choice depends on your loss capitalisation method and budget, and we supply both.
Are amorphous alloy or OLTC designs available?
Yes. Amorphous alloy core designs reduce no-load loss where the transformer runs lightly loaded for long periods. On-load tap changing suits networks with wide voltage variation. Both are built to order.
Which standards does it comply with?
Oil-immersed transformers are designed to IEC 60076 and the GB equivalent. Where your project specifies ANSI/IEEE or a local efficiency tier, confirm the applicable clauses before production.
What do you need to provide a quotation?
Rated capacity, primary and secondary voltage, frequency, vector group, winding material, tap changer requirement, altitude and quantity.
Typical Applications
The 6.6kV Custom Voltage Three-Phase Oil Distribution Transformer (1000kVA) 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 6.6kV Custom Voltage Three-Phase Oil Distribution Transformer (1000kVA)? Send your single line diagram and ratings to our sales team and our engineers will confirm the configuration, lead time and price.
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