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1600kVA Oil Immersed Transformer
1600kVA Oil Immersed Transformer
1600kVA Oil Immersed Transformer
1600kVA Oil Immersed Transformer
1600kVA Oil Immersed Transformer
1600kVA Oil Immersed Transformer

1600kVA Oil Immersed Transformer

The 1600kVA oil-immersed transformer provides efficient and reliable voltage conversion for utility, industrial and renewable energy projects. It is available with customized voltage ratios, copper or aluminum windings, ONAN cooling and IEC/IEEE-compliant designs.

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Project Partners

Phone/WhatsApp: 8619131285373

Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.

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The 1600kVA oil-immersed transformer is a three-phase distribution transformer designed to convert medium-voltage electricity into a stable low-voltage supply. It is suitable for utility networks, industrial facilities, renewable energy projects, commercial buildings and infrastructure systems.

The transformer uses a high-permeability silicon-steel core, copper or aluminum windings and transformer-grade insulating oil. Voltage ratio, vector group, impedance, losses, cooling method, protection accessories and environmental design can be customized to meet specific project requirements.

Main Technical Specifications

Parameter Standard Configuration / Options
Rated Capacity 1600kVA / 1.6MVA
Transformer Type Three-phase oil-immersed distribution transformer
Primary Voltage 6kV–35kV, customized
Secondary Voltage 400V, 415V, 440V, 480V, 690V or customized
Rated Frequency 50Hz or 60Hz
Cooling Method ONAN; ONAF optional
Winding Material Copper or aluminum
Vector Group Dyn11, Dyn5, Yyn0, YNd1 or customized
Tap Changer Off-circuit tap changer or OLTC
Typical Tapping Range ±2 × 2.5%, ±5% or customized
Short-Circuit Impedance Typically 4.5%–6.5%
Core Material Cold-rolled grain-oriented silicon steel
Insulating Fluid Mineral oil, natural ester or synthetic ester
Tank Structure Hermetically sealed corrugated tank or conservator type
Installation Indoor or outdoor
Standard Altitude Up to 1,000m; high-altitude design available
Ambient Temperature Typically −25°C to +40°C; special design available
Corrosion Protection C3, C4 or C5 paint system
Applicable Standards IEC 60076, IEEE C57, ANSI, GB or project standard
Expected Service Life Approximately 25–30 years under proper operating conditions

Typical Voltage Configurations

The 1600kVA transformer can be supplied in configurations such as:

  • 10kV/0.4kV
  • 11kV/0.415kV
  • 11kV/0.433kV
  • 13.8kV/0.48kV
  • 20kV/0.4kV
  • 22kV/0.415kV
  • 33kV/0.415kV
  • 33kV/0.48kV
  • Other customized voltage ratios

Typical Rated Current

The rated current depends on the selected voltage ratio.

Voltage Side Example Voltage Approximate Rated Current
High Voltage 11kV 84A
Low Voltage 415V 2,226A
Low Voltage 400V 2,309A
High Voltage 33kV 28A
Low Voltage 480V 1,925A

Values are calculated for a three-phase 1600kVA transformer and should be confirmed during engineering design.

Key Product Features

High-Efficiency Core

The magnetic core is manufactured from high-permeability, cold-rolled grain-oriented silicon steel. A step-lap core structure can reduce no-load loss, excitation current, vibration and operating noise.

Reliable Winding System

Copper or aluminum conductors are selected according to the required electrical performance and project budget. The windings are mechanically reinforced to withstand short-circuit forces and load variations.

Efficient Oil Cooling

Transformer oil provides electrical insulation and transfers heat from the core and windings to the tank or radiators. ONAN cooling provides reliable operation without external fans, while ONAF cooling is available for special loading requirements.

Sealed Tank Construction

The hermetically sealed corrugated tank helps prevent moisture and oxygen from entering the insulation system. This reduces oil oxidation and routine maintenance requirements.

A conservator-type structure can also be supplied when required.

Low Loss and Stable Output

The electrical and magnetic design can be optimized to provide:

  • Reduced no-load and load losses
  • Stable secondary voltage
  • Controlled operating temperature
  • Low noise and vibration
  • Strong short-circuit resistance
  • Reliable continuous operation
  • Lower lifetime energy costs

Adaptation to Harsh Environments

Special designs are available for:

  • High ambient temperatures
  • High-altitude installation
  • Coastal salt-fog environments
  • Desert and dusty locations
  • Tropical and high-humidity regions
  • Mining and heavy industrial sites
  • Solar and wind power projects

Main Components

A typical 1600kVA oil-immersed transformer includes:

  • Magnetic core
  • High-voltage winding
  • Low-voltage winding
  • Insulating oil
  • Transformer tank
  • Corrugated fins or external radiators
  • High-voltage bushings
  • Low-voltage bushings
  • Neutral bushing
  • Off-circuit tap changer
  • Pressure-relief device
  • Oil-level indicator, where applicable
  • Oil filling and drain valves
  • Earthing terminals
  • Lifting lugs
  • Jacking pads
  • Rollers or skid base
  • Stainless-steel rating plate

Optional Accessories

The transformer can be equipped with:

  • Buchholz relay
  • Oil temperature indicator
  • Winding temperature indicator
  • Magnetic oil-level gauge
  • Sudden-pressure relay
  • Pressure vacuum gauge
  • Cooling fans
  • Marshalling box
  • Current transformers
  • Neutral current transformer
  • Surge arresters
  • Cable boxes
  • Plug-in bushings
  • HV and LV terminal enclosures
  • Remote alarm and trip contacts
  • Online temperature-monitoring system
  • Digital operating-status monitoring
  • Anti-condensation heater

Customization Options

Item Available Options
Voltage Ratio Customized primary and secondary voltages
Frequency 50Hz or 60Hz
Winding Copper or aluminum
Vector Group According to system configuration
Voltage Regulation Off-circuit or on-load tap changer
Cooling ONAN or ONAF
Insulating Fluid Mineral oil, natural ester or synthetic ester
Tank Design Sealed corrugated or conservator type
Efficiency According to local regulations or tender requirements
Temperature Rise Standard or reduced temperature-rise design
Noise Standard or low-noise design
Paint System C3, C4 or C5 corrosion protection
Terminals Bushings, cable boxes or busbar connections
Monitoring Local instruments or remote digital monitoring
Standards IEC, IEEE/ANSI, GB or customer-specified standard

Manufacturing and Quality Control

The manufacturing process includes:

  1. Technical requirement review
  2. Electrical and mechanical design
  3. Drawing confirmation
  4. Core cutting and stacking
  5. High- and low-voltage winding production
  6. Active-part assembly
  7. Vacuum drying
  8. Tank manufacturing and surface treatment
  9. Vacuum oil filling
  10. Electrical testing
  11. Final inspection and packing

Routine Factory Tests

Every transformer is tested before shipment. Routine tests generally include:

  • Winding resistance measurement
  • Voltage-ratio measurement
  • Vector-group verification
  • No-load loss and current measurement
  • Load-loss measurement
  • Short-circuit impedance measurement
  • Insulation resistance measurement
  • Applied voltage withstand test
  • Induced overvoltage withstand test
  • Transformer oil testing
  • Tap-changer functional test
  • Tank leakage inspection
  • Accessory and alarm-contact testing
  • Visual and dimensional inspection

Optional Type and Special Tests

The following tests can be arranged when required:

  • Temperature-rise test
  • Lightning impulse test
  • Sound-level measurement
  • Partial-discharge test
  • Zero-sequence impedance measurement
  • Capacitance and dissipation-factor test
  • Frequency response analysis
  • Dissolved-gas analysis
  • Customer-witnessed FAT
  • Independent third-party inspection

Applications

The 1600kVA oil-immersed transformer is suitable for:

  • Utility distribution networks
  • Industrial factories
  • Manufacturing plants
  • Mining projects
  • Cement and steel plants
  • Oil and gas facilities
  • Solar PV power plants
  • Wind power projects
  • Battery energy-storage systems
  • Commercial complexes
  • Hospitals and airports
  • Water-treatment plants
  • Municipal infrastructure
  • Data centres
  • Industrial parks
  • EPC power-distribution projects

Packing and Shipping

The transformer is secured on a reinforced base and protected with moisture-resistant export packaging. Bushings, instruments and accessories are protected against impact and may be packed separately when required.

Available transportation methods include:

  • Standard or open-top container
  • Flat-rack container
  • Breakbulk vessel
  • Road transportation
  • Railway transportation

Routine test reports, approved drawings, packing lists, operation manuals and agreed quality documents can be supplied with the transformer.

Information Required for a Quotation

Please provide:

  • Primary and secondary voltage
  • Frequency
  • Vector group
  • Winding material
  • Required impedance
  • Tap range and tap-changer type
  • Applicable standard
  • Installation altitude
  • Ambient temperature
  • Indoor or outdoor installation
  • Cable or busbar connection
  • Required accessories
  • Loss or efficiency requirements
  • Quantity
  • Destination country

Final technical parameters, losses, dimensions, weight and accessories are subject to the approved project specification and manufacturing drawings.

Parameter Specification
Rated Capacity 1600kVA / 1.6MVA
Transformer Type Three-phase oil-immersed distribution transformer
Primary Voltage 6kV–35kV or customized
Secondary Voltage 400V, 415V, 440V, 480V, 690V or customized
Rated Frequency 50Hz or 60Hz
Cooling Method ONAN; ONAF optional
Winding Material Copper or aluminum
Vector Group Dyn11, Dyn5, Yyn0, YNd1 or customized
Tap Changer Off-circuit tap changer or OLTC
Tapping Range ±2 × 2.5%, ±5% or customized
Short-Circuit Impedance Typically 4.5%–6.5%
Core Material Cold-rolled grain-oriented silicon steel
Insulating Fluid Mineral oil, natural ester or synthetic ester
Tank Design Hermetically sealed corrugated tank or conservator type
Temperature Rise According to IEC/IEEE requirements
Ambient Temperature Standard: −25°C to +40°C; special design available
Installation Altitude Up to 1,000m standard; high-altitude design available
Installation Location Indoor or outdoor
Insulation Level Designed according to the selected voltage class
Noise Level According to IEC 60076-10 or project requirements
Corrosion Protection C3, C4 or C5 paint system available
Protection Accessories Pressure-relief device, temperature indicator and oil-level indicator
Terminal Arrangement Porcelain bushings, cable boxes or busbar connections
Applicable Standards IEC 60076, IEEE C57, ANSI, GB or customer-specified standard
Expected Service Life Approximately 25–30 years under proper operating conditions

Transformer losses, insulation levels, dimensions, weight and accessory configuration are finalized according to the approved voltage ratio, efficiency requirements and project drawings.

Customizable Item Available Options
Rated Capacity 1600kVA or customized according to load requirements
Primary Voltage 6kV, 10kV, 11kV, 13.8kV, 20kV, 22kV, 33kV, 35kV or customized
Secondary Voltage 400V, 415V, 440V, 480V, 690V or customized
Frequency 50Hz or 60Hz
Winding Material Copper or aluminum
Vector Group Dyn11, Dyn5, Yyn0, YNd1 or project-specific configuration
Tap Changer Off-circuit tap changer or on-load tap changer
Tapping Range ±2 × 2.5%, ±5% or customized
Short-Circuit Impedance Designed according to system and protection requirements
Cooling Method ONAN or ONAF
Insulating Fluid Mineral oil, natural ester or synthetic ester
Tank Structure Hermetically sealed corrugated tank or conservator type
Efficiency Level Customized to local regulations and tender requirements
Temperature Rise Standard or reduced temperature-rise design
Noise Level Standard or low-noise configuration
Installation Indoor or outdoor
Altitude Design Standard below 1,000m or customized for high-altitude operation
Climate Adaptation Tropical, desert, coastal, high-humidity or cold-climate design
Corrosion Protection C3, C4 or C5 paint system
Terminal Arrangement Porcelain bushings, plug-in bushings, cable boxes or busbar connections
Enclosure Open terminals, protective covers or enclosed cable chambers
Protection Devices Buchholz relay, pressure-relief device and sudden-pressure relay
Monitoring Devices Oil temperature, winding temperature and oil-level indicators
Digital Monitoring Remote temperature, oil-level, alarm and operating-status monitoring
Additional Accessories Surge arresters, current transformers, marshalling box, rollers and cooling fans
Paint Colour RAL colour customized to project requirements
Applicable Standard IEC 60076, IEEE C57, ANSI, GB or customer-specified standard
Nameplate and Labels English, bilingual or customer-specified language
Documentation Drawings, manuals, test reports, data sheets and FAT records
Inspection Customer-witnessed FAT or independent third-party inspection
Packaging Container, flat-rack, breakbulk or seaworthy export packaging

All configurations are finalized according to the project’s electrical system, installation environment, operating conditions and approved technical specification.

Each 1600kVA oil-immersed transformer is inspected, protected and securely fixed before shipment to ensure safe delivery to the project site.

Export Packaging

  • Transformer body secured on a reinforced steel or wooden base
  • Bushings protected with impact-resistant covers
  • Valves, terminals and instruments securely sealed
  • Moisture-resistant and dust-proof protective wrapping
  • Exposed metal components treated against corrosion
  • Accessories and spare parts packed in separate waterproof wooden cases
  • Shipping marks applied according to customer requirements
  • Seaworthy packaging suitable for long-distance transportation

Pre-Shipment Inspection

Before dispatch, the manufacturer checks:

  • Transformer appearance and paint finish
  • Oil level and oil-sealing condition
  • Tank, valves, welds and gasket connections
  • Bushings and terminal arrangement
  • Protection and monitoring accessories
  • Nameplate and warning labels
  • Packing list and shipping marks
  • Overall dimensions and transportation weight

Packing and loading photographs can be provided before shipment.

Transportation Methods

Depending on the dimensions, weight and destination, the transformer can be shipped by:

  • Standard container
  • Open-top container
  • Flat-rack container
  • Breakbulk vessel
  • Road transportation
  • Railway transportation
  • Multimodal international transport

Large or vulnerable accessories may be removed and packed separately to reduce the risk of transportation damage.

Shipping Documents

The documentation package can include:

  • Commercial invoice
  • Packing list
  • Bill of lading
  • Certificate of origin
  • Product quality certificate
  • Routine test report
  • Approved transformer drawings
  • Installation and operation manual
  • Warranty document
  • FAT records
  • Compliance certificates
  • Customs documents, when required

Unloading instructions, installation guidance, remote technical support and spare-parts services can also be provided after delivery.

Each 1600kVA oil-immersed transformer undergoes comprehensive inspections and electrical tests during manufacturing and before shipment. Testing is performed according to IEC 60076, IEEE C57 or the project’s approved technical specification.

Raw Material and Component Inspection

  • Silicon-steel core material verification
  • Copper or aluminum conductor inspection
  • Insulation material quality inspection
  • Transformer oil quality verification
  • Bushing and tap-changer inspection
  • Tank steel and welding-material inspection
  • Protection accessory and instrument verification

Manufacturing Process Inspection

  • Core cutting, stacking and clamping inspection
  • Winding dimensions and conductor-joint inspection
  • Winding insulation and mechanical-strength verification
  • Active-part assembly inspection
  • Lead connection and vector-group verification
  • Vacuum drying-process monitoring
  • Vacuum oil-filling inspection
  • Tank pressure and sealing inspection
  • Paint thickness and surface-finish inspection

Final Electrical Tests

Test Item Inspection Purpose
Winding Resistance Measurement Verifies winding continuity, conductor connections and phase balance
Voltage-Ratio Measurement Confirms the designed transformation ratio at every tap position
Vector-Group Verification Checks phase displacement, polarity and terminal connections
Insulation Resistance Test Evaluates insulation between HV, LV and earth
No-Load Loss Test Measures magnetic-core losses at rated voltage
No-Load Current Test Checks excitation current and core condition
Load-Loss Test Measures winding and stray losses
Short-Circuit Impedance Test Confirms impedance against the approved design value
Applied Voltage Test Verifies insulation strength between windings and earth
Induced Overvoltage Test Checks inter-turn and inter-layer insulation
Transformer Oil Test Confirms oil dielectric strength and condition
Accessory Functional Test Verifies indicators, relays, contacts and tap-changer operation
Tank Leakage Test Confirms the sealing performance of the tank, valves and gaskets

Optional Type and Special Tests

The following tests can be arranged when required:

  • Temperature-rise test
  • Lightning impulse test
  • Sound-level measurement
  • Partial-discharge test
  • Zero-sequence impedance measurement
  • Capacitance and dissipation-factor test
  • Harmonic measurement
  • Frequency response analysis
  • Dissolved-gas analysis
  • Short-circuit withstand test
  • Third-party laboratory testing

Factory Acceptance Test

Customer representatives or an independent inspection company may witness the Factory Acceptance Test before shipment. Approved drawings, nameplate details, test reports, calibration records and inspection results can be included in the final documentation package.

All testing procedures and acceptance criteria are confirmed according to the applicable standard and approved project specification.

Every 1600kVA oil-immersed transformer undergoes routine testing before shipment. Tests are conducted according to IEC 60076, IEEE C57 or the project’s approved technical specification.

Routine Test Purpose
Winding Resistance Measurement Confirms winding continuity, connection quality and resistance balance between phases
Voltage-Ratio Measurement Verifies the designed voltage ratio at every tap position
Vector-Group Verification Confirms polarity, phase sequence and phase displacement
Short-Circuit Impedance Measurement Checks that the transformer impedance meets the approved design value
Load-Loss Measurement Measures winding and stray losses at the specified reference temperature
No-Load Loss Measurement Determines magnetic-core losses at rated voltage
No-Load Current Measurement Evaluates the excitation current and magnetic-core condition
Insulation Resistance Test Checks insulation between HV, LV and earth
Applied Voltage Withstand Test Verifies main insulation strength between windings and earth
Induced Overvoltage Test Checks inter-turn and inter-layer winding insulation
Tap-Changer Functional Test Confirms correct operation and electrical connection at every tap
Transformer Oil Test Verifies the dielectric strength and condition of the insulating oil
Tank Leakage Test Checks the tank, valves, welds and gasket connections for oil leakage
Accessory Functional Test Verifies indicators, relays, cooling devices and alarm contacts
Earthing Continuity Test Confirms reliable grounding connections
Visual and Dimensional Inspection Checks dimensions, terminals, nameplate, paint finish and accessories

Additional Routine Checks

  • Phase-to-phase resistance balance
  • Terminal marking and connection verification
  • Bushing condition inspection
  • Oil-level inspection
  • Pressure-relief device inspection
  • Control-circuit and marshalling-box verification
  • Cooling fan operation, when supplied
  • Alarm and trip contact verification
  • Paint-thickness inspection
  • Final appearance and cleanliness inspection

A complete routine test report can be supplied before shipment. Type and special tests, including temperature-rise, lightning-impulse, sound-level and partial-discharge tests, are available when specified by the customer.

The 1600kVA oil-immersed transformer is designed for medium-voltage power distribution in utility, industrial, commercial and renewable energy systems. It provides reliable voltage conversion for medium-to-large electrical loads and continuous-duty applications.

Utility Distribution Networks

Suitable for:

  • Urban and rural distribution networks
  • Utility substations
  • Grid-extension projects
  • Residential developments
  • Regional power-distribution systems

Industrial Facilities

Provides stable power for:

  • Manufacturing plants
  • Industrial parks
  • Steel and cement factories
  • Chemical-processing facilities
  • Food-processing plants
  • Production lines and heavy machinery
  • Warehouses and logistics centres

Solar and Renewable Energy Projects

The transformer can be customized for:

  • Solar photovoltaic power plants
  • Wind farms
  • Battery energy-storage systems
  • Hydroelectric projects
  • Renewable-energy substations
  • Grid-connected generation systems

Special designs are available for harmonic loads, bidirectional power flow and fluctuating operating conditions.

Mining and Heavy Industry

Suitable for mines, crushing plants, conveyor systems, pumping stations and mineral-processing facilities. Reinforced windings, enhanced cooling and heavy-duty corrosion protection can be provided for harsh environments.

Oil and Gas Facilities

Applicable to:

  • Oilfields
  • Refineries
  • Petrochemical plants
  • Pumping stations
  • Compressor stations
  • Auxiliary power systems

C4 or C5 anti-corrosion protection is available for coastal and chemically aggressive locations.

Commercial and Public Buildings

Provides power distribution for:

  • Shopping centres
  • Office complexes
  • Hotels
  • Hospitals
  • Airports
  • Universities
  • Data centres
  • Large residential developments

Infrastructure Projects

Suitable for municipal facilities, water-treatment plants, ports, railway systems, transportation hubs and construction projects.

EPC and Customized Projects

The transformer can be engineered according to project-specific voltage ratios, vector groups, impedance, efficiency targets, installation conditions and protection requirements.

Typical configurations include:

  • 10kV/0.4kV
  • 11kV/0.415kV
  • 13.8kV/0.48kV
  • 20kV/0.4kV
  • 22kV/0.415kV
  • 33kV/0.415kV

Other voltage combinations are available according to the local grid and project design.

1. What is a 1600kVA oil-immersed transformer used for?

It converts medium-voltage electricity into a lower distribution voltage for utility networks, factories, renewable energy projects, commercial buildings and infrastructure facilities.

2. Can the voltage ratio be customized?

Yes. Common configurations include 10kV/0.4kV, 11kV/0.415kV, 13.8kV/0.48kV, 20kV/0.4kV and 33kV/0.415kV. Other voltage ratios are available.

3. What is the approximate output current?

For a three-phase 1600kVA transformer, the approximate rated secondary current is:

  • 2,309A at 400V
  • 2,226A at 415V
  • 1,925A at 480V

The final current depends on the approved secondary voltage.

4. Are copper and aluminum windings available?

Yes. Copper and aluminum winding designs are available. The selection depends on performance requirements, transformer dimensions, operating conditions and project budget.

5. What cooling method is used?

The standard cooling method is ONAN—Oil Natural Air Natural. ONAF cooling with external fans can be supplied for special loading or temperature requirements.

6. Can the transformer be installed outdoors?

Yes. It can be supplied with a sealed tank, weather-resistant accessories and a C3, C4 or C5 corrosion-protection system for outdoor installation.

7. Can it operate in hot or coastal environments?

Yes. High-temperature insulation, enhanced cooling, sealed terminal boxes, stainless-steel hardware and C5 anti-corrosion coating are available.

8. Is the transformer suitable for high-altitude installation?

Yes. For sites above 1,000 metres, the insulation clearances, cooling performance and temperature-rise limits are adjusted to the actual altitude.

9. Can it be used for solar or wind projects?

Yes. It can be designed for solar PV, wind power and battery energy-storage projects, including bidirectional power flow, harmonic loads and customized voltage ratios.

10. What standards are available?

The transformer can be manufactured according to IEC 60076, IEEE C57, ANSI, GB or other customer-specified standards.

11. What routine tests are performed?

Routine tests include winding resistance, voltage ratio, vector group, no-load loss, load loss, impedance, insulation resistance and dielectric withstand tests. The tank and accessories are also inspected.

12. Can customers witness the factory testing?

Yes. Customer-witnessed Factory Acceptance Testing or independent third-party inspection can be arranged before shipment.

13. What protection accessories are available?

Available accessories include:

  • Buchholz relay
  • Pressure-relief device
  • Oil-level indicator
  • Oil and winding temperature indicators
  • Sudden-pressure relay
  • Current transformers
  • Remote alarm and trip contacts
  • Online monitoring system

14. What maintenance is required?

Routine maintenance generally includes inspecting the oil level, oil condition, bushings, gaskets, cable connections, grounding system and protection devices.

15. How is the transformer packed for export?

The transformer is secured on a reinforced base with protected bushings, sealed openings and moisture-resistant wrapping. Accessories are packed separately when necessary.

16. What information is required for a quotation?

Please provide:

  • Primary and secondary voltage
  • Frequency
  • Vector group
  • Winding material
  • Required impedance
  • Tap range
  • Applicable standard
  • Installation altitude
  • Ambient temperature
  • Required accessories
  • Quantity and destination country

17. What is the expected service life?

With correct installation, appropriate loading and regular maintenance, the transformer is generally designed for approximately 25–30 years of operation.

1600kVA Oil Immersed Transformer1600kVA Oil Immersed Transformer

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