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2500kVA Oil Immersed Transformer

2500kVA Oil Immersed Transformer

التصنيف:

Project Partners

Phone/WhatsApp: 8619131285373

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

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The 2500kVA oil-immersed transformer is a high-capacity, three-phase distribution transformer designed to convert medium-voltage electricity into a stable low-voltage supply. With a rated capacity of 2.5MVA, it is suitable for utility networks, industrial plants, mining facilities, renewable energy projects, commercial complexes and major infrastructure systems.

The transformer uses a low-loss silicon-steel core, mechanically reinforced copper or aluminum windings, transformer-grade insulating oil and a durable sealed tank. Voltage ratio, vector group, impedance, cooling method, efficiency, accessories and environmental protection can be customized for each project.

Main Technical Specifications

Parameter Standard Configuration / Options
Rated Capacity 2500kVA / 2.5MVA
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
Typical Tapping Range ±2 × 2.5%, ±5% or customized
Short-Circuit Impedance Typically 6%; customizable to approximately 5%–8%
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-specific standard
Expected Service Life Approximately 25–30 years under proper operating conditions

Typical Voltage Configurations

Available voltage ratios include:

  • 6kV/0.4kV
  • 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
  • 35kV/0.4kV
  • Other customized voltage combinations

Typical Rated Current

The rated current depends on the selected voltage ratio.

Voltage Side Example Voltage Approximate Rated Current
High Voltage 10kV 144.3A
High Voltage 11kV 131.2A
High Voltage 20kV 72.2A
High Voltage 33kV 43.7A
Low Voltage 400V 3,608A
Low Voltage 415V 3,478A
Low Voltage 480V 3,007A
Low Voltage 690V 2,092A

Values are calculated for a three-phase 2500kVA transformer and must be confirmed during engineering design.

Key Product Features

Low-Loss Magnetic Core

The transformer core is manufactured from high-permeability, cold-rolled grain-oriented silicon steel. Step-lap construction helps reduce no-load loss, excitation current, operating noise and vibration.

Reinforced Winding Structure

Copper or aluminum windings are mechanically reinforced to withstand thermal stress, voltage fluctuations and short-circuit forces. Internal oil ducts improve heat dissipation throughout the winding structure.

Efficient Cooling System

Transformer oil provides electrical insulation and transfers heat from the core and windings to the tank or radiators.

  • ONAN cooling is suitable for standard continuous operation.
  • ONAF cooling with fans is available for increased loading or high-temperature conditions.

Reliable Tank Construction

A hermetically sealed corrugated tank helps prevent moisture and oxygen from entering the insulation system, reducing oil oxidation and maintenance requirements.

A conservator-type tank with a Buchholz relay can also be provided.

Stable High-Load Operation

The electrical and mechanical design provides:

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

Adaptability to Harsh Environments

Special designs are available for:

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

Main Components

A typical 2500kVA oil-immersed transformer includes:

  • Magnetic core
  • High-voltage winding
  • Low-voltage winding
  • Transformer insulating oil
  • Main 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
  • Oil filling and drain valves
  • Earthing terminals
  • Lifting lugs
  • Jacking pads
  • Rollers or skid base
  • Stainless-steel rating plate

Optional Accessories

Available accessories include:

  • 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 transformer-monitoring interface
  • Anti-condensation heater

Customization Options

Item Available Options
Voltage Ratio Customized primary and secondary voltages
Frequency 50Hz or 60Hz
Winding Material Copper or aluminum
Vector Group According to the electrical system
Tap Regulation Off-circuit or on-load tap changer
Impedance Customized for fault-current and protection requirements
Cooling Method ONAN or ONAF
Insulating Fluid Mineral oil, natural ester or synthetic ester
Tank Design Sealed corrugated or conservator type
Efficiency Level According to local regulations or tender requirements
Temperature Rise Standard or reduced temperature-rise design
Noise Level Standard or low-noise configuration
Corrosion Protection C3, C4 or C5 paint system
Terminals Bushings, cable boxes or busbar connections
Environmental Design Tropical, desert, coastal, cold-climate or high-altitude
Monitoring Local instruments or remote digital monitoring
Standards IEC, IEEE/ANSI, GB or customer-specified standard

Manufacturing Process

  1. Technical requirement review
  2. Electrical and mechanical design
  3. Customer drawing approval
  4. Core cutting and stacking
  5. High- and low-voltage winding production
  6. Active-part assembly
  7. Vacuum drying and insulation treatment
  8. Tank fabrication and surface coating
  9. Vacuum oil filling
  10. Electrical and mechanical testing
  11. Final inspection, packing and shipment

Routine Factory Tests

Every 2500kVA transformer undergoes routine testing before shipment, including:

  • 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 according to the project specification:

  • 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
  • Short-circuit withstand test
  • Customer-witnessed FAT
  • Independent third-party inspection

Applications

The 2500kVA oil-immersed transformer is suitable for:

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

Packing and Shipping

The transformer is secured on a reinforced steel or wooden base and protected with moisture-resistant export packaging. Bushings, radiators, conservators and vulnerable accessories may be removed and packed separately when necessary.

Available transportation methods include:

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

The documentation package can include approved drawings, routine test reports, operation manuals, packing lists, quality certificates and FAT records.

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
  • Maximum and minimum ambient temperature
  • Indoor or outdoor installation
  • Cable or busbar connection
  • Required accessories
  • Efficiency or loss requirements
  • Quantity
  • Destination country

Final losses, insulation levels, dimensions, oil quantity, total weight and accessory configuration are subject to the approved technical specification and manufacturing drawings.

Parameter Specification
Rated Capacity 2500kVA / 2.5MVA
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 6%; customizable from approximately 5%–8%
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
Terminal Arrangement Porcelain bushings, plug-in bushings, cable boxes or busbar connections
Protection Accessories Pressure-relief device, temperature indicators and oil-level indicator
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, dimensions, weight, oil quantity, insulation levels and accessory configuration are finalized according to the approved voltage ratio and project drawings.

Customizable Item Available Options
Rated Capacity 2500kVA 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 fault-current 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, data sheets, test reports and FAT records
Inspection Customer-witnessed FAT or independent third-party inspection
Packaging Open-top 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 2500kVA oil-immersed transformer is carefully inspected, protected and securely fixed before shipment to ensure safe delivery to the project site.

Export Packaging

  • Transformer body secured on a reinforced steel transportation base
  • Bushings protected with impact-resistant covers
  • Valves, terminals and monitoring instruments securely sealed
  • Moisture-resistant and dust-proof protective wrapping
  • Exposed metal parts treated against corrosion
  • Radiators, conservator and vulnerable accessories protected or removed when necessary
  • Accessories and spare parts packed in waterproof wooden cases
  • Steel straps and protective corner supports used for reinforcement
  • 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, radiators, valves, welds and gasket connections
  • Bushings and terminal arrangement
  • Protection and monitoring accessories
  • Nameplate and warning labels
  • Packing list and shipping marks
  • Overall dimensions, transportation weight and centre of gravity
  • Lifting points and securing positions

Packing and loading photographs can be provided before shipment.

Transportation Methods

Depending on the transformer’s dimensions, weight, destination and site-access conditions, available transportation methods include:

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

For oversized units, bushings, radiators, conservators and other vulnerable accessories may be removed and packed separately to reduce transportation height and prevent 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 2500kVA oil-immersed transformer undergoes comprehensive inspections and electrical tests throughout 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
  • Supplier certificate and material-document review

Manufacturing Process Inspection

  • Core cutting, stacking and clamping inspection
  • Core insulation and earthing verification
  • Winding dimensions and conductor-joint inspection
  • Winding insulation and mechanical-strength verification
  • Internal oil-duct inspection
  • 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
  • Accessory installation and control-wiring inspection

Final Electrical Tests

Test Item Inspection Purpose
Winding Resistance Measurement Verifies winding continuity, connection quality and phase balance
Voltage-Ratio Measurement Confirms the designed transformation ratio at every tap position
Vector-Group Verification Checks polarity, phase displacement 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 magnetic-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
Tap-Changer Test Verifies correct operation at every tap position
Accessory Functional Test Checks indicators, relays, contacts and cooling equipment
Tank Leakage Test Confirms sealing of the tank, radiators, 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. The final documentation package can include:

  • Approved technical drawings
  • Transformer nameplate information
  • Routine and optional test reports
  • Measuring-equipment calibration records
  • Material and component certificates
  • Inspection photographs
  • Packing and shipping records

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

Every 2500kVA 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 Verifies 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 excitation current and magnetic-core condition
Insulation Resistance Test Checks insulation between HV, LV and earth
Applied Voltage Withstand Test Verifies the 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 connections at every tap
Transformer Oil Test Verifies the dielectric strength and condition of the insulating oil
Tank Leakage Test Checks the tank, radiators, valves, welds and gaskets for leakage
Accessory Functional Test Verifies indicators, relays, cooling equipment and alarm contacts
Earthing Continuity Test Confirms reliable transformer 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
  • Transformer 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 2500kVA oil-immersed transformer is designed for medium-voltage power distribution in utility, industrial, commercial and renewable energy systems. Its 2.5MVA capacity makes it suitable for large facilities with continuous, concentrated or fluctuating electrical loads.

Utility Distribution Networks

Suitable for:

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

Industrial Facilities

Provides stable power for:

  • Manufacturing plants
  • Industrial parks
  • Steel and cement factories
  • Chemical-processing facilities
  • Food-processing plants
  • Heavy production lines
  • 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, voltage fluctuations and high ambient temperatures.

Mining and Heavy Industry

Suitable for:

  • Mining sites
  • Crushing and screening plants
  • Conveyor systems
  • Pumping stations
  • Mineral-processing facilities
  • Heavy machinery and motor loads

Reinforced windings, enhanced cooling and heavy-duty corrosion protection can be provided for harsh operating environments.

Oil and Gas Facilities

Applicable to:

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

C4 or C5 anti-corrosion systems are available for coastal and chemically aggressive environments.

Commercial and Public Facilities

Provides reliable power distribution for:

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

Infrastructure Projects

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

EPC and Customized Projects

The transformer can be engineered according to project-specific voltage ratios, vector groups, impedance, efficiency targets, installation environments 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
  • 35kV/0.4kV

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

1. What is a 2500kVA oil-immersed transformer used for?

It converts medium-voltage electricity into a lower distribution voltage for utility networks, industrial plants, renewable energy projects, commercial complexes 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 2500kVA transformer, the approximate rated secondary current is:

  • 3,608A at 400V
  • 3,478A at 415V
  • 3,007A at 480V
  • 2,092A at 690V

The final rated current depends on the approved secondary voltage.

4. Are copper and aluminum windings available?

Yes. Both copper and aluminum windings are available. Selection depends on efficiency requirements, transformer dimensions, loading 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 provided for increased loading or high-temperature operation.

6. What short-circuit impedance is available?

A typical impedance value is approximately 6%. It can usually be customized between approximately 5% and 8% according to fault-current calculations and protection coordination.

7. Can the transformer use an OLTC?

Yes. An on-load tap changer can be supplied when automatic voltage regulation during operation is required. An off-circuit tap changer is available for standard applications.

8. Can the transformer be installed outdoors?

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

9. Can it operate in hot or coastal environments?

Yes. Available options include enhanced cooling, reduced temperature rise, sealed terminal chambers, stainless-steel hardware and C5 anti-corrosion coating.

10. Is it suitable for high-altitude installation?

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

11. Can it be used for solar, wind or energy-storage projects?

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

12. What standards are available?

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

13. 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 insulating oil, tank and accessories are also inspected.

14. Can customers witness the factory testing?

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

15. 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
  • Cooling fans
  • Remote alarm and trip contacts
  • Online monitoring system

16. What maintenance is required?

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

17. How is the transformer packed for export?

The transformer is secured on a reinforced transportation base with protected bushings, sealed openings and moisture-resistant wrapping. Radiators, conservators and vulnerable accessories may be removed and packed separately.

18. What information is 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
  • Required accessories
  • Quantity
  • Destination country

19. 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.

2500kVA Oil Immersed Transformer2500kVA Oil Immersed Transformer

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