Product Introduction
As an important member of the 110kV-class oil-immersed transformer series, this product incorporates mature and reliable design solutions in materials, processes, and structure. It features compact size, light weight, high efficiency, low losses, low noise, and reliable operation, effectively reducing grid losses and operating costs while delivering significant economic benefits.
Key Features and Specifications
| Parameter | Technical Indicators |
| Rated voltage | 110kV/10.5kV (or according to user specified voltage combination) |
| Rated capacity range | 6300kVA -120000kVA |
| Rated frequency | 50Hz |
| Phase number | Three phase |
| Voltage regulation method | without excitation voltage regulation (no-load voltage regulation) |
| Voltage regulation range | ± 5% or ± 2 × 2.5% |
| Cooling method | ONAN or ONAF |
| Connect group | YNd11 (or other specified by the user) |
| Short circuit impedance | 10.5% -12.5% (according to user requirements and standard configuration) |
| Energy efficiency level | meets the GB 20052 Level 2 energy efficiency standard, with the option of Level 1 energy efficiency |
| Noise level | ≤ 60dB (self cooling state) |
| Partial discharge level | ≤ 100pC |
| Using altitude | ≤ 1000m (special design required for exceeding 1000m) |
Product Characteristics
This series of products complies with the latest version of the national standard GB/T 6451 Technical Parameters and Requirements for Oil-Immersed Power Transformers, as well as the GB 1094 series of standards (covering general requirements, temperature rise, insulation levels, and short-circuit withstand capability), and the energy efficiency requirements of GB 20052 Minimum Allowable Values of Energy
Efficiency and Energy Efficiency Grades for Power Transformers. They have the following characteristics:
- Efficient and energy-saving, with lower life cycle costs;
- High reliability, adaptable to harsh working conditions;
- Strong short-circuit resistance capability, safer operation;
- Low noise design, environmentally friendly;
- Maintenance free design reduces operation and maintenance costs.
Technical Parameter
◆110kV Oil-immersed Three-phase Double-winding Unexcited Voltage Regulating Power Transformer Performance Parameter Table
Rated capacity (kVA) | Voltage combination(kV) | connection-group code | No-load current % | No-load loss kW | Load loss kW | Impedance % | ||
(H.V.) kV | High voltage tapping range % | (L.V.) kV | ||||||
6300 | 110 151 121 | ±2x2.5 | 6.3 6.6 10.5 | YNd11
| 0.5 | 4.1 | 32 | 10.5 |
8000 | 0.5 | 4.9 | 38 | 10.5 | ||||
10000 | 0.46 | 5.8 | 45 | 10.5 | ||||
12500 | 0.46 | 6.8 | 53 | 10.5 | ||||
16000 | 0.43 | 8.3 | 65.7 | 10.5 | ||||
20000 | 0.43 | 9.7 | 79 | 10.5 | ||||
25000 | 0.4 | 11.4 | 94 | 10.5 | ||||
31500 | 0.38 | 13.5 | 111 | 10.5 | ||||
40000 | 0.36 | 16.2 | 133 | 10.5 | ||||
50000 | 0.34 | 19.4 | 158 | 10.5 | ||||
63000 | 0.3 | 22.9 | 187 | 10.5 | ||||
75000 | 13.8 15.75 18 21 | 0.26 | 26.0 | 212 | 12-14 | |||
90000 | 0.24 | 29.9 | 245 | 12-14 | ||||
120000 | 0.22 | 37.3 | 303 | 12-14 | ||||
150000 | 0.19 | 44.1 | 359 | 12-14 | ||||
180000 | 0.16 | 49.5 | 411 | 12-14 | ||||
FAQs
Q1: What is a power transformer?
A: A power transformer is a device that utilizes the principle of electromagnetic induction to alter the magnitude of alternating current voltage. It is primarily used in power transmission and distribution systems to convert high-voltage electrical energy into low-voltage energy suitable for end-users, or vice versa to step up the voltage.
Q2: How does a power transformer work?
A: The working principle of power transformers is not complicated, the core is the law of electromagnetic induction. Simply put, it converts alternating current energy of one voltage level into alternating current energy of another voltage level at the same frequency through a process of "electricity generating magnetism and magnetism generating electricity".
Q3: What are the main types of power transformers?
A: By insulation medium, transformers are mainly divided into oil-immersed and dry types; by voltage regulation method, they are categorized into no-excitation voltage regulation (requires power-off adjustment) and on-load voltage regulation (can adjust under load); by winding configuration, they include dual-winding, three-winding, and auto-transformers.
Q4: Where are oil-immersed power transformers used?
A: It is widely used in outdoor or high-capacity settings such as substations, power plants, large industrial enterprises, regional power grids, and renewable energy step-up substations, particularly suitable for areas with high heat dissipation requirements and open environments.
Q5: What are the environmental considerations for power transformers?
A: Environmental considerations include managing the disposal of old transformers and minimizing the leakage of hazardous substances like transformer oil.
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