130kV High-Voltage Power Transformer
The 130kV Power Transformer is designed for advanced high-voltage transmission and distribution systems requiring superior electrical stability and long-term operational reliability. Built with an optimized magnetic circuit and precision-engineered windings, it delivers excellent voltage regulation, minimized energy losses, and strong resistance to thermal and mechanical stress. The transformer features a reinforced insulation structure and a sealed oil-immersed cooling system that ensures consistent performance under fluctuating load and environmental conditions. Its rugged construction supports outdoor installation and continuous operation in demanding climates. Designed to meet international grid requirements, this transformer is suitable for utility networks, industrial power hubs, and infrastructure projects where safety, efficiency, and service continuity are critical.
- Primary Voltage Ratings 110kV, 115kV, 130kV or others
- Secondary Voltage Ratings 11/10.5/6.6/6.3kV or customized
- H.V. Tap Range ± 8×2.5% HV taps or others
- Type Oil-immersed power transformer
- BIL up to 350kV
- Standards IEEE, ANSI, IEC
- Application Power transmission and transformation systems, large industrial parks, energy infrastructure projects etc
- Power Rating Up to 200 MVA
- Certificate UL , CESI , CE
- Cooling Method ONAN/ ONAF
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
130kV High-Voltage Power Transformer
Technical Specifications
Accessories
| Rated Power | Up to 200 MVA |
| Rating Primary Voltage | 110kV, 115kV, 130kV |
| Secondary Voltage |
6.3 kV 6.6 kV 10.5 kV 11 kV Customized |
| Frequency | 50/60Hz |
| Vector Group | Dyn11, YD11, YNd11 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE, CAS Std or Customized |
| Impedance Voltage | As IEC |
| Altitude | ≤1,000m or Customized |
| Enclosure material | Mid Steel |
| HV Bushing |
| LV Bushing |
| OLTC/NLTC |
| Lifting hook for complete transformer |
| Name plate |
| Oil temperature |
| Winding temperature |
| Radiators |
| Oil level |
| Pressure relief valve |
| CT |
Customization Optional
130kV High-Voltage Power Transformer
The 130kV Power Transformer can be fully customized to meet specific grid architectures, operational standards, and regional requirements. Electrical customization includes flexible rated capacities, voltage combinations, frequency options, impedance values, and vector group configurations to ensure seamless integration into existing transmission systems. Both copper and aluminum winding options are available, allowing customers to balance efficiency, durability, and cost. Tap-changing solutions may be configured as off-circuit or on-load designs with customized step ranges to maintain voltage stability during load variations. Special insulation systems can be engineered for high-altitude locations, extreme temperatures, or environments with elevated pollution levels.
From a mechanical and system perspective, the transformer can be adapted with various cooling methods, including natural and forced oil circulation, to match load profiles and ambient conditions. Tank structures may be reinforced for seismic regions or designed with compact footprints for space-restricted substations. Customers can specify advanced monitoring and protection devices such as gas relays, temperature sensors, pressure relief systems, and intelligent condition monitoring interfaces. Optional features include low-noise structural designs, fire-resistant insulating fluids, anti-corrosion coatings, and customized paint schemes. Each customized transformer undergoes dedicated engineering validation and testing to ensure full compliance with technical specifications and international standards.
Packing and Shipping
130kV High-Voltage Power Transformer
The packing process for the 130kV Power Transformer is carefully engineered to preserve structural integrity and electrical performance throughout transportation. Prior to packing, the transformer is thoroughly inspected, cleaned, and treated with protective coatings. All sealing surfaces, flanges, and openings are secured to prevent contamination. Sensitive components such as bushings, cooling assemblies, and control cabinets are removed when necessary and packaged separately using reinforced crates with internal cushioning and moisture barriers.
The transformer's main body is mounted on a robust transport base designed to withstand vibration and impact during transit. Shock-absorbing materials, steel restraints, and bracing systems are applied to stabilize the unit and protect critical load-bearing points. Moisture-resistant wrapping, vacuum sealing, or inert gas filling may be used to maintain internal dryness and insulation quality, especially for long-distance or overseas shipments.
Shipping methods are selected according to transformer size, weight, and destination logistics. Options include flat-rack containers, open-top containers, or break-bulk cargo for oversized units. All packaging complies with international export standards, including ISPM-15 requirements for wooden materials. Clear markings indicate lifting points, center of gravity, stacking limits, and handling precautions to ensure safe loading and unloading.
Comprehensive shipping documentation accompanies each delivery, including packing lists, quality certificates, test reports, drawings, and installation manuals. Upon arrival, detailed unpacking and storage instructions are provided. Optional on-site technical services, such as supervision, oil processing, reassembly, and commissioning support, are available to ensure a smooth installation and reliable startup.
The transformer's main body is mounted on a robust transport base designed to withstand vibration and impact during transit. Shock-absorbing materials, steel restraints, and bracing systems are applied to stabilize the unit and protect critical load-bearing points. Moisture-resistant wrapping, vacuum sealing, or inert gas filling may be used to maintain internal dryness and insulation quality, especially for long-distance or overseas shipments.
Shipping methods are selected according to transformer size, weight, and destination logistics. Options include flat-rack containers, open-top containers, or break-bulk cargo for oversized units. All packaging complies with international export standards, including ISPM-15 requirements for wooden materials. Clear markings indicate lifting points, center of gravity, stacking limits, and handling precautions to ensure safe loading and unloading.
Comprehensive shipping documentation accompanies each delivery, including packing lists, quality certificates, test reports, drawings, and installation manuals. Upon arrival, detailed unpacking and storage instructions are provided. Optional on-site technical services, such as supervision, oil processing, reassembly, and commissioning support, are available to ensure a smooth installation and reliable startup.
32
32 years of industry experience
Manufacturer Test
130kV High-Voltage Power Transformer
Progress test
Progress testing for the 130kV Power Transformer is conducted at defined production milestones to ensure strict quality control throughout manufacturing. Raw materials, including core steel, conductors, insulation components, and insulating oil, are inspected upon receipt to verify conformity with approved specifications. During core assembly and winding fabrication, dimensional accuracy, mechanical alignment, and insulation application are continuously monitored. The active part undergoes controlled drying and vacuum treatment, with detailed records of temperature, pressure, and moisture levels.
Intermediate inspections include electrical continuity checks, winding resistance measurements, and turns ratio verification prior to final assembly. Tank fabrication is examined for weld integrity, dimensional precision, and surface protection quality. Pressure and leak tests are performed to confirm oil tightness before oil filling. All progress test results are documented, reviewed, and approved to ensure any deviations are corrected early, maintaining product consistency and reliability.
Design Tests
All transformers will be tested after finishing the production test items as follows:
♦ Leak testing with pressure for liquid-immersed transformers
♦ Test of transformer oil
♦ Measurement of voltage ratio and check of phase displacement
♦ Measurement of winding DC resistance
♦ Measurement of d. c. Insulation resistance between each winding to earth, and check of the core and frame insulation
♦ Capacitive bushing test
♦ Measurement of dissipation factor (tan δ) of the insulation system capacitances, and determination of capacitances windings-to-earth
♦ Measurement of no-load loss and current at 90%,100%,110% of rated voltage
♦ Operation test on on-load tap-changer
♦ Measurement of short-circuit impedance and load loss
♦ Lightning impulse test
♦ Induced-voltage test with partial discharge measurement
♦ Auxiliary wiring check
♦ Current transformer test
♦ Frequency response analysis test
Transformer Factory Acceptance Test
The Factory Acceptance Test (FAT) for the 130kV Power Transformer is conducted after complete assembly to validate compliance with technical specifications and applicable international standards. Routine electrical tests include measurement of winding resistance, voltage ratio accuracy, vector group confirmation, polarity checks, and insulation resistance evaluation. Dielectric verification is performed through applied voltage and induced overvoltage tests to confirm insulation robustness.
Performance testing assesses no-load losses, load losses, impedance voltage, and thermal behavior under rated conditions. Partial discharge testing evaluates insulation integrity, while impulse testing verifies resistance to transient overvoltage events. Mechanical inspections include tank pressure testing, oil leakage examination, cooling system operation checks, and tap changer functionality verification. Oil samples are analyzed to confirm dielectric strength and purity. All FAT results are compiled into a comprehensive report and approved prior to shipment authorization.
Routine Test - Measurement Of Voltage Ratio And Check Of Phase Displacement
Purpose of Testing
The purpose of measuring the voltage ratio and checking the phase displacement is to verify that the transformer’s windings are correctly connected and functioning according to design specifications. The voltage ratio test ensures that the transformer delivers the correct output voltage relative to its input, while the phase displacement check confirms that the phase relationship between primary and secondary windings is accurate.
Testing Equipment
Voltage Ratio Tester (also known as a Transformer Turns Ratio Tester, TTR Tester)
Phase Displacement Tester (also called Phase Angle Meter or Phase Sequence Meter)
Digital Multimeter (for basic checks)
Oscilloscope (for phase displacement)
Phase Displacement Tester (also called Phase Angle Meter or Phase Sequence Meter)
Digital Multimeter (for basic checks)
Oscilloscope (for phase displacement)
Pre-Test Preparation
The transformer must be completely disconnected from any live electrical circuits to prevent electrical hazards. Ensure that the transformer is de-energized and isolated from the system before beginning any testing.
Visually inspect the primary and secondary winding connections of the transformer to ensure that they are properly configured and accessible for testing. Ensure that the transformer tap settings are clearly labeled and can be adjusted if necessary.
Ensure all personnel are equipped with appropriate safety gear (e.g., gloves, safety glasses) and that proper grounding and earthing procedures are in place to prevent electrical accidents.
Visually inspect the primary and secondary winding connections of the transformer to ensure that they are properly configured and accessible for testing. Ensure that the transformer tap settings are clearly labeled and can be adjusted if necessary.
Ensure all personnel are equipped with appropriate safety gear (e.g., gloves, safety glasses) and that proper grounding and earthing procedures are in place to prevent electrical accidents.
Test Progress
Ensure Safety and Equipment Setup:
Begin by confirming that the transformer is de-energized and isolated from any live circuits. Set up the necessary testing equipment, including the voltage ratio tester, phase displacement tester, and any other required tools. Verify that all equipment is properly calibrated and ready for use. Voltage Ratio Measurement:
Apply a known voltage to the primary winding of the transformer using the voltage ratio tester. Measure the corresponding voltage at the secondary winding. Calculate the voltage ratio by comparing the primary and secondary voltages. Ensure that the measured ratio aligns with the transformer's rated specification. If the ratio deviates significantly, it may indicate an issue with the windings or tap settings.
Begin by confirming that the transformer is de-energized and isolated from any live circuits. Set up the necessary testing equipment, including the voltage ratio tester, phase displacement tester, and any other required tools. Verify that all equipment is properly calibrated and ready for use. Voltage Ratio Measurement:
Apply a known voltage to the primary winding of the transformer using the voltage ratio tester. Measure the corresponding voltage at the secondary winding. Calculate the voltage ratio by comparing the primary and secondary voltages. Ensure that the measured ratio aligns with the transformer's rated specification. If the ratio deviates significantly, it may indicate an issue with the windings or tap settings.
Test Standard
IEC 60076 Oil-immersed power transformers
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Power transmission and transformation systems, large industrial parks, energy infrastructure projects etc
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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