large power transformer
1. Three-turn structure and multi-voltage output, which can simultaneously adapt to 110kV/35kV/10kV multi-level power supply, reducing equipment costs and occupied space.
2. Regulate the voltage under load on the high-voltage side without power outage, with good voltage stabilization effect, stable power quality and adaptability to voltage fluctuations in the power grid.
3. Low-loss and energy-saving design, the no-load loss is reduced by ≥30% compared with S9, which brings significant long-term operating economic benefits.
4. High short-circuit resistance, robust coil and housing structure, and high operational reliability.
5. Completely sealed and maintenance-free, stable oil quality, low labor intensity and maintenance cost.
6. Low noise and environmental protection, suitable for sensitive areas such as residential and commercial areas, with strong adaptability to the environment.
1. Product overview and model description
Three-phase, three-turn, oil-immersedSSZ series voltage transformer with voltage regulation under load
Its key features include an independent three-winding power supply and under-load voltage stabilization without interrupting the power supply. It can simultaneously output three voltage levels (high, medium, and low), making it well-suited for multi-voltage grids and multi-load scenarios. It is key equipment in 110 kV transmission and distribution systems, featuring multi-voltage output, energy conservation, and voltage stabilization.
It is widely used in 110kV key substations, regional power supply centers, large industrial parks, urban power distribution network upgrades, new energy collection stations and other places where high power supply reliability, voltage stability and multi-range output signal are required.
2. Basic technical parameters (customizable)
2.1 Basic parameters
Rated power: 6300 kVA – 125000 kVA
Connection group: YNyn0d11 (standard), YNyn0yn0 (optional)
2.2 Losses and energy efficiency
Energy Efficiency: Highly efficient energy saving
2.3 Online voltage regulation
Regulation Type: Real-time voltage regulation under load (no power-off required)
Transformer: oil cooled
2.4 Other key parameters
Thermal insulation class:
Cooling method: ONAN / ONAF (OFAF is used for high-power equipment)
Ambient temperature: from -30℃ to +45℃
Altitude: ≤1000 meters (up to 4000 meters, adjustable)
Transformer oil: industrial oil 25#
3. Design and technical characteristics
3.1 Main components
Multi-stage step connectors, three-prong design.
No mounting holes, low vibration, low noise level.
Phosphating and painting to prevent moisture and corrosion.
Cable cores that can be wound help reduce noise and losses.
3.2 Cooling system
ONAN: Natural cooling, low noise level.
ONAF: Ventilator Assisted, High Overload Capacity
Intelligent temperature control, automatic fan control.
4. Main advantages of the product
Three-phase winding with multiple output voltages
Equipped with high, medium and low voltage outputs; reduces equipment and space requirements.
Load regulation without power off
Voltage stability, high adaptability to network fluctuations, high quality of electricity.
Ultra-low losses and high efficiency
Significant energy saving effect; short payback period of investment.
Low noise level and eco-friendliness
5. Application Scenarios
Power grid: key 110 kV substations, regional power supply, modernization of the city power grid.
Large industrial enterprises: metallurgy, chemical industry, mining industry, cement industry, large industrial parks.
Urban development: commercial zones, residential areas, metro, airports, railway stations.
New energy: photovoltaic and wind power, 110 kV collection and booster stations.
Special environmental conditions: high mountain plateaus, low temperatures, coastal salt spray, corrosion zones.
