110kV 115kV Power Transformer
NPC ELECTRIC's 110kV and 115kV power transformers are designed with advanced low-loss silicon steel sheets and efficient cooling systems, complying with international standards such as IEC 60076 and GB 1094, ensuring stable and reliable operation in high-voltage transmission systems. They are widely used in large power plants, substations, and industrial parks, providing safe and efficient power conversion and transmission solutions for power grids.
- Primary Voltage Ratings 110kV, 115kV 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 5000-400000kVA
- 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
110kV 115kV Power Transformer
Technical Specifications
Accessories
| Rated Power | 5000-400000kVA |
| Rating Primary Voltage | 110kV, 115kV |
| 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
110kV 115kV Power Transformer
NPC ELECTRIC's 110kV 115kV power transformer has excellent performance and reliability, and is designed with high efficiency and long life in mind. Its core material is made of high-quality silicon steel sheets, which ensures efficient magnetic flux transmission and low energy loss. The transformer adopts advanced winding technology, which can withstand high short-circuit tolerance and ensure stable operation of the equipment under extreme working conditions. The shell is made of corrosion-resistant materials, adapting to various harsh environments, and has good waterproof and dustproof functions. In order to improve the stability of the power system, the transformer is equipped with multiple protection devices, including overload, overcurrent, and temperature protection. The overall design meets international standards, ensuring high reliability and a low failure rate. The cooling system of the transformer adopts efficient heat dissipation technology, maintains an excellent temperature control effect, and extends the service life of the equipment.
The equipment is easy to install, supports automatic monitoring and remote operation, and is easy to maintain and manage. The transformer has high seismic resistance and can maintain good working conditions during earthquakes or other natural disasters. Its noise control design minimizes noise during operation, which meets environmental protection requirements. Finally, NPC ELECTRIC's 110kV power transformer is widely used worldwide, deeply trusted by customers, and has significant economic benefits.
Packing and Shipping
110kV 115kV Power Transformer
When packing and shipping NPC ELECTRIC 110kV 115kV power transformers, first of all, we ensure that the transformers are strictly inspected before leaving the factory to ensure that their performance indicators meet the standards.
In order to prevent any damage during transportation, the transformer will be placed in a sturdy wooden box, and the outside of the wooden box will be reinforced to ensure resistance to external impact and pressure. The box will be equipped with cushioning materials such as foam and pads to effectively prevent possible collisions and friction during transportation. At the same time, the sensitive parts of the transformer will be specially marked and protected with special protective covers.
In terms of transportation methods, considering the weight and volume of the transformer, suitable heavy trucks or containers are used for transportation to ensure that the transformer can move stably and safely during transportation. During transportation, we will strictly abide by various traffic safety regulations to avoid damage caused by improper transportation.
In order to ensure safety during transportation and smooth delivery, we have purchased full insurance for this transportation process to ensure timely compensation in case of accidents. Every detail has been carefully designed to ensure that the transformer can arrive at the customer's designated location smoothly and without damage.
Upon arrival at the destination, customers can confirm the integrity and functionality of the transformer by unpacking and inspecting the goods. If there are any abnormalities during transportation, relevant personnel will immediately take emergency measures to ensure that the transformer can be quickly resumed. This transportation guarantee service also includes an adaptability assessment of the destination environment to ensure that the transportation process will not be affected by bad weather or other unforeseen factors.
We are committed to providing the most professional service to ensure that customers' equipment is safe and worry-free during transportation. Through such strict packaging and transportation management, we guarantee that customers can arrive on time and in the best condition.
In order to prevent any damage during transportation, the transformer will be placed in a sturdy wooden box, and the outside of the wooden box will be reinforced to ensure resistance to external impact and pressure. The box will be equipped with cushioning materials such as foam and pads to effectively prevent possible collisions and friction during transportation. At the same time, the sensitive parts of the transformer will be specially marked and protected with special protective covers.
In terms of transportation methods, considering the weight and volume of the transformer, suitable heavy trucks or containers are used for transportation to ensure that the transformer can move stably and safely during transportation. During transportation, we will strictly abide by various traffic safety regulations to avoid damage caused by improper transportation.
In order to ensure safety during transportation and smooth delivery, we have purchased full insurance for this transportation process to ensure timely compensation in case of accidents. Every detail has been carefully designed to ensure that the transformer can arrive at the customer's designated location smoothly and without damage.
Upon arrival at the destination, customers can confirm the integrity and functionality of the transformer by unpacking and inspecting the goods. If there are any abnormalities during transportation, relevant personnel will immediately take emergency measures to ensure that the transformer can be quickly resumed. This transportation guarantee service also includes an adaptability assessment of the destination environment to ensure that the transportation process will not be affected by bad weather or other unforeseen factors.
We are committed to providing the most professional service to ensure that customers' equipment is safe and worry-free during transportation. Through such strict packaging and transportation management, we guarantee that customers can arrive on time and in the best condition.
32
32 years of industry experience
Manufacturer Test
110kV 115kV Power Transformer
Progress test
During the manufacturing process of NPC ELECTRIC's 110kV 115kV power transformer, a series of detailed progress tests were carried out. First, engineers checked the mechanical structure and electrical performance of the transformer to ensure that all indicators met the design requirements. Next, no-load tests and short-circuit tests were performed to verify the stability and safety of the transformer under different working conditions. Subsequently, temperature rise tests were carried out to evaluate the heat dissipation effect of the transformer in long-term operation. Finally, the withstand voltage test was completed to ensure that the transformer can withstand the predetermined voltage level and ensure the reliability and safety of the equipment. Through these tests, it was ensured that the various performances of the transformer met the standards and were ready for use.
Design Tests
All transformers will be tested after finishing the production test items as below:
♦ 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
NPC Electric conducts rigorous quality control testing on every transformer or representative samples, as well as on specific components and materials, to ensure compliance with design specifications throughout the production process.
The Factory Acceptance Test (FAT) for a power transformer is a critical step performed before shipment to verify that the unit meets all applicable standards and delivers optimal performance. The FAT includes the following key procedures:
Visual Inspection: Evaluates the transformer’s physical condition, including the enclosure, terminals, and labeling, to ensure conformance with design and safety requirements.
Electrical Testing: Involves measuring winding resistance, insulation resistance, and performing turns ratio tests to validate electrical integrity and functionality.
Dielectric Strength Test: Applies high voltage across the insulation system to ensure it can endure both normal and transient operating voltages without failure.
Load Testing: Simulates real-world operating conditions to assess the transformer’s voltage regulation, temperature rise, and overall efficiency under load.
Protection Device Testing: Verifies the proper operation of integrated protective components such as thermal sensors, temperature relays, and tap changers (if applicable).
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
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
Transformers Packaging (3)
Transformers Packaging (4)
Transformers Packaging (5)
Transformers Packaging (6)
Transformers Packaging (7)
Transformers Packaging (8)
Related Products
35kV 46kV Power Transformer
NPC ELECTRIC's 35kV and 46kV power transformer complies with international standards such as IEC and ANSI, and features high efficiency, low loss, and strong insulation. This product is widely used in power grid main transformers, power plants, industrial and mining enterprises, and large infrastructure projects. It has a compact structure and reliable operation, and is suitable for all types of outdoor and indoor installation environments.
66kV 69kV Power Transformer
66 69kV power transformer uses high-performance silicon steel sheets and a fully sealed structure design, with excellent insulation performance and thermal stability. The product complies with international and national standards, such as 1 . IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers 3.ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer;8. Local After-Sales Services In North America South
132kV 138kV Power Transformer
132kV 138kV power transformer complies with international standards as below standard: 1. IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers; 3. ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer; 6. Local After-Sales Services In North America South
220kV 230kV Power Transformer
NPC ELECTRIC's 220kV and 230kV power transformer complies with the International Electrotechnical Commission (IEC) standards as below: 1. IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers; 3. ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer; 6. Local After-Sales Services In North America SouthFAQ From Customers
-
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.
-
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.
-
Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
Welcome your inquiry
Honesty, Integrity, Frugality, Activeness and Passion