50/60Hz 11kV to 400V 500kVA/630kVA 3 Phase Oil Immersed Distribution Transformer Product Specificati
50/60Hz 11kV to 400V 500kVA/630kVA 3 Phase Oil Immersed Distribution Transformer Product Specification
1. Product Overview
This document introduces the 50/60hz 11kv to 400v 500kva 630 Kva Oil Immersed Distribution Transformer 3 Phase Transformer, a high-performance three-phase step-down power distribution device compliant with IEC 60076 international standards. Designed for global dual-frequency power grid operation, the transformer supports both 50Hz and 60Hz working frequencies, covering two mainstream rated capacities of 500kVA and 630kVA. It features a standard voltage conversion ratio of 11kV high voltage input to 400V low voltage output, perfectly matching the low-voltage power supply requirements of industrial and civil power distribution systems.
Adopting mature oil-immersed cooling and insulation technology, this 3 phase oil immersed distribution transformer utilizes ONAN (Oil Natural Air Natural) self-cooling mode, with high-purity insulating oil as the heat dissipation and insulation medium. The whole machine is optimized with low-loss core and winding structure, realizing stable voltage conversion, low energy consumption and strong operational reliability. It is a core key equipment for medium and low voltage power grid voltage reduction and power distribution, and can adapt to long-term continuous operation in complex grid environments.
2. Core Product Parameters & Specifications
The 11kv to 400v 500kva 630kva oil immersed transformer adopts standardized industrial design with unified core parameters and differentiated capacity configurations, meeting diverse power load demands:
• Rated Frequency: 50Hz/60Hz dual-frequency universal, compatible with power grid standards in Asia, Europe, Africa and other regions
• Voltage Ratio: 11kV (High Voltage) / 400V (Low Voltage), supporting ±2×2.5% adjustable tapping range to adapt to grid voltage fluctuation
• Rated Capacity: Two optional specifications of 500kVA and 630kVA, covering medium-scale power distribution load scenarios
• Phase Structure: 3 Phase symmetrical design, stable three-phase power output, effectively avoiding unbalanced load power consumption
• Cooling Method: ONAN natural oil circulation and air cooling, no auxiliary cooling equipment required, low operation noise
• Connection Mode: Standard Dyn11 or Yyn0 connection, small zero-sequence current, strong ability to resist grid harmonic interference
• Insulation Level: Comply with international insulation standards, with strong lightning impulse resistance and electrical breakdown resistance
• Operational Efficiency: The full-load operation efficiency is higher than 98%, with extremely low no-load loss and load loss
3. Core Application Purposes
As a professional 3 phase oil immersed distribution transformer, its core function is to complete safe, stable and efficient step-down conversion of 11kV medium-voltage grid electric energy to 400V low-voltage usable electric energy, realizing safe power distribution and load power supply for terminal electrical equipment. It mainly undertakes three core tasks in the power system:
First, medium and low voltage power conversion. It converts high-voltage electric energy transmitted by 11kV overhead lines or cables into 400V industrial and civil standard voltage, solving the voltage matching problem between high-voltage transmission grid and terminal low-voltage electrical equipment, and ensuring the safe and normal operation of electrical devices.
Second, stable power distribution and load regulation. The 500kVA and 630kVA capacity configurations can bear medium-scale centralized power load, evenly distribute three-phase power, balance grid load pressure, and avoid power supply instability, voltage drop and other problems caused by excessive local load.
Third, long-term reliable power guarantee. Relying on oil-immersed insulation and heat dissipation structure, the transformer realizes 24-hour continuous uninterrupted operation, provides stable and continuous power support for various production and living scenarios, and reduces power failure and equipment damage risks caused by voltage conversion failure.
4. Typical Application Scenarios
The 50/60hz 11kv 400v 500kva 630kva oil immersed transformer has strong environmental adaptability and load compatibility, and is widely used in various medium-scale power distribution scenarios with 11kV grid access conditions:
4.1 Industrial Production Scenarios
It is suitable for small and medium-sized factories, processing plants, manufacturing workshops and industrial parks. Industrial production equipment such as motors, production lines and mechanical equipment mostly adopt 400V three-phase power supply. This 3 phase transformer can stably convert 11kV grid power to meet the continuous power demand of industrial production, and its low-loss and anti-fluctuation characteristics can effectively protect precision industrial equipment from grid voltage impact.
4.2 Commercial & Civil Building Scenarios
Applicable to shopping malls, office buildings, residential communities, schools, hospitals and other public and civil buildings. It undertakes the overall power distribution work of building lighting, air conditioning, elevator, domestic electricity and auxiliary electrical equipment. The dual-frequency design adapts to different regional power grid standards, ensuring stable power supply for daily life and commercial operation.
4.3 Municipal & Infrastructure Scenarios
Widely used in urban and rural municipal power grid reconstruction, road traffic facilities, scenic area supporting facilities, water supply and drainage pump stations and other infrastructure projects. The oil-immersed structure is suitable for outdoor pole-mounted and box-type substation installation, adapting to outdoor wind, rain and high-temperature environments, and providing reliable power guarantee for municipal infrastructure operation.
4.4 Remote & Regional Power Supply Scenarios
It is applicable for regional power supply in remote towns, rural centralized power supply areas, mining areas and temporary engineering projects. The 500kVA and 630kVA moderate capacity can meet the centralized power demand of regional users, and the simple and durable structure reduces the maintenance cost of remote power supply equipment.
5. Core Product Features
5.1 Dual-Frequency Universal & Strong Compatibility
Supporting 50Hz and 60Hz dual-frequency operation, this11kv to 400v distribution transformer is not limited by regional grid frequency standards, and can be widely used in domestic and overseas power projects. The adjustable voltage tapping design can adapt to slight fluctuations of grid voltage, ensuring stable output of 400V rated voltage, with strong grid adaptability.
5.2 Low Loss & High Energy Efficiency
Adopting high-quality silicon steel sheet core and high-conductivity copper/aluminum winding, the transformer effectively reduces no-load loss, load loss and magnetic leakage loss. The overall operation efficiency is up to 98% or above, which greatly reduces long-term operation energy consumption and operation cost for users, meeting energy-saving and emission-reduction industry standards.
5.3 Stable Operation & High Safety
The oil-immersed fully sealed structure isolates internal electrical components from external air, avoiding oxidation, dust and moisture erosion. The insulating oil has excellent heat dissipation and arc extinction performance, which can quickly take away the heat generated by operation and avoid overheating and short-circuit faults. It has good lightning resistance, overload resistance and short-circuit resistance, ensuring long-term safe and stable operation.
5.4 Durable & Low Maintenance
The whole machine adopts industrial-grade thickened shell and anti-corrosion coating, which can adapt to high temperature, low temperature, humidity and other harsh outdoor environments. The ONAN natural cooling structure has no vulnerable rotating parts, with low failure rate and long service life. The sealed oil tank design avoids insulating oil leakage and deterioration, reducing daily maintenance frequency and maintenance cost.
5.5 Reasonable Structure & Easy Installation
Integrated compact structural design, reasonable internal layout, small floor space, supporting pole-mounted and ground-mounted installation. The 500kVA and 630kVA models have moderate volume and weight, convenient transportation, hoisting and on-site installation and commissioning, which can quickly complete grid access and put into operation, improving project construction efficiency.
