Product Overview
The oil-immersed on-load tap-changing transformer is a core specialized device for power transmission and distribution systems. It is suitable for three-phase AC 50Hz systems. It can adjust the output voltage under load conditions using a dedicated on-load tap-changer, compensating for grid fluctuations and line losses, ensuring stable power supply to electrical equipment. Widely used in power feeder endpoints, industrial plants, new energy support, rural power grids in mountainous areas, and other fields, it is key equipment for solving voltage drops, load fluctuations, and voltage regulation for new energy grid connection. Suitable for medium to large-scale continuous power supply scenarios, it balances precision, stability, and intelligence.
The product adopts a fully sealed oil-immersed structure (non-sealed optional). The core uses 30q130 high-permeability silicon steel sheets. The windings use oxygen-free copper conductors, paired with PCB-free environmentally friendly insulating oil and vacuum oil filling process. It is equipped with a high-precision embedded vacuum on-load tap-changer and an intelligent controller. Features include precise voltage regulation, smooth switching, low loss, and strong short-circuit withstand capability. It complies with multiple national standards and has passed CCC and ISO certifications. The voltage regulation efficiency exceeds 99.5%, meeting the needs of sensitive loads and new energy grid connection.
Operating Environment
1. Ambient temperature: -25℃～+45℃, 24h average ≤ +35℃; anti-freeze insulating oil and heating devices can be customized for low temperatures to ensure startup in severely cold regions.
2. Altitude: ≤1000m; customizable up to 3000m under special conditions. Optimized insulation structure for high-altitude adaptation ensures stable on-load switching.
3. Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%; anti-condensation devices can be provided for humid environments to avoid insulation aging.
4. Installation site: No violent vibration, corrosive gases, or flammable/explosive dust; keep away from strong electromagnetic interference. Adaptable to C3-C5 corrosive environments, suitable for scenarios such as power equipment rooms and outdoor feeder stations.
5. Outdoor units have rain, dust, and corrosion protection performance, and can be pole-mounted. Indoor units require good ventilation and can be equipped with railed bases, suitable for confined spaces.
6. Installation inclination ≤3°. The core and tank are firmly secured to avoid displacement during transport and operation. Suitable for lifting ring and pole-mounting installation.
Technical Parameters
Item | Unit | Parameters |
|---|---|---|
Rated Voltage | kV | 10/0.4, 35/0.4 (customizable). On-load tap-changing range ±2×2.5%/±3×2.5%/±4×2.5%, supports wide-range stepless adjustment, complies with GB/T 12325-2008 standard |
Rated Capacity | kVA | 100～12500 (full series, customizable). Suitable for SVR, TSJA, S13 on-load series, covering common models |
Cooling Method | --- | ONAN (Oil Natural Air Natural), ONAF (Oil Natural Air Forced), OFAF (Forced Oil Forced Air - customizable). Enhances overload capacity, suitable for long-term outdoor operation |
Insulation Level | kV | Power frequency withstand voltage 65～100kV/1min; induced withstand voltage 130～195kV (10s), complies with GB/T 1094.3-2017 standard, ensuring insulation safety |
Insulating Oil | --- | 25# environmentally friendly transformer oil (low-temperature, anti-aging types customizable). PCB-free, flash point ≥140℃ |
Voltage Regulation Accuracy | % | ≤ ±1.0% (±0.5% customizable). Fine-tuning resolution 0.3V/step, response delay <20ms |
Intelligent Control Function | --- | Supports RS-485/Modbus and 4G communication. Equipped with "Four Remote" functions (remote measurement, remote signaling, remote control, remote adjustment), suitable for unattended scenarios |
Product Features
1. Live-Line Voltage Regulation, Ensuring Continuous Power Supply: Equipped with an embedded vacuum on-load tap-changer, allowing voltage regulation under load without power interruption. Smooth, arc-free switching avoids power outages, solving the pain points of traditional regulation requiring power cuts.
2. Precise and Efficient Voltage Regulation with Fast Response: Intelligent controller monitors voltage in real-time. Accuracy ≤ ±1.0% (high-precision customizable). Response delay <20ms. Completes regulation within 3 seconds, stabilizing endpoint voltage.
3. High Efficiency, Low Loss, Significant Energy Savings: Uses high-permeability silicon steel sheets and oxygen-free copper conductors. Some models equipped with amorphous alloy cores, meeting Tier 1/Tier 2 energy efficiency. Regulation efficiency >99.5%, reducing electricity costs.
4. Stable Electrical Performance, Strong Impact Resistance: Optimized insulation and impedance design. Stable short-circuit impedance, outstanding resistance to short circuits and surges. End windings have reinforced insulation, suitable for load fluctuation scenarios.
5. Intelligent and Convenient, Low Operational Costs: Supports three regulation modes. Equipped with "Four Remote" functions, enabling remote monitoring and fault early warning. Long tap-changer service life, low maintenance frequency.
6. Robust Structure, Wide Adaptability: Fully sealed, leak-proof tank. Outdoor units suitable for harsh environments. Indoor units compact, can be pole-mounted or installed in equipment rooms. Convenient installation.
7.Good Compatibility, Suitable for New Energy: Bidirectional voltage regulation, stabilizes voltage fluctuations from new energy grid connection, solves "day-night voltage deviation". Compatible with sensitive loads, meeting smart grid requirements.
Our Advantages
1. Strong Customization Capability: Capacity, regulation parameters, and protection grade can be customized according to needs. Suitable for special conditions, meeting on-load regulation requirements in various fields.
2. Standardized Production & Strict Quality Control: Standardized production with quality control throughout the entire process and multiple inspections. Each unit comes with a factory test report, ensuring consistent performance and stable operation.
3. Complete Qualifications: Possesses CCC, ISO certifications, etc. Uses high-quality tap-changers. Meets project acceptance requirements, facilitating rapid project implementation.
4. Stable Delivery & Comprehensive Support: Stable delivery times, supporting expedited orders. Provides integrated services including transportation, installation guidance, and commissioning. Short construction cycle, ensuring power supply continuity.
5. Complete After-Sales Service: Provides full lifecycle support. Localized teams respond quickly, reducing equipment downtime risk, suitable for maintenance needs in outdoor scenarios.
Ordering Guide
Please provide the following information when ordering to ensure precise product matching:
1. Specify rated capacity, voltage, connection symbol, and determine the voltage regulation range and accuracy. Specify whether it is suitable for new energy or feeder endpoint regulation.
2. Describe the operating environment and any special requirements. Specify whether it is for outdoor pole-mounting installation to match the corresponding operating conditions.
3. Determine the cooling method, insulating oil type, impedance voltage, and energy efficiency level. Specify whether special performance customization is required.
4. Inform the installation method, incoming/outgoing line arrangements, and layout requirements, and specify whether matching installation accessories are needed."
