500kva 630kva 10kv 12.47kv 0.11kv 0.4kv Oil Immersed Transformer

500kva 630kva 10kv 12.47kv 0.11kv 0.4kv Oil Immersed Transformer

1. Product Description

The 500kva and 630kva Oil Immersed Transformer is a versatile medium-capacity three-phase distribution transformer engineered for global industrial, municipal and utility power grid systems. Supporting dual high primary input voltages of 10kv and 12.47kv, this heavy-duty oil-filled power equipment delivers flexible low-voltage outputs at 0.11kv and 0.4kv, covering both special precision low-voltage power supply and standard industrial and civilian power distribution requirements. Fully compliant with IEC and ANSI industry standards, this 10kv/12.47kv oil immersed distribution transformer is widely used in 50Hz and 60Hz AC power systems, serving as a universal voltage conversion solution for medium-load power consumption scenarios.

Manufactured with high-grade low-loss grain-oriented silicon steel core and full oxygen-free copper windings, this 500kva to 630kva oil immersed transformer effectively minimizes no-load loss, load loss and magnetic flux leakage during long-term continuous operation. Adopting proven ONAN oil natural air natural cooling technology and fully sealed corrugated oil tank structure, the equipment uses high-purity insulating oil to achieve dual functions of internal electrical insulation and circulating heat dissipation. The dual-capacity design of 500kva and 630kva meets differentiated medium-load power demands, while the multi-voltage configuration of 10kv, 12.47kv input and 0.11kv, 0.4kv output solves the voltage matching difficulties of diversified terminal electrical equipment. Every unit undergoes strict factory dielectric testing and voltage ratio calibration to ensure stable and consistent operational performance in complex grid environments.

2. Core Uses

This multi-voltage medium-capacity oil immersed transformer focuses on precise bidirectional voltage transformation and hierarchical power distribution for medium-voltage power grids. Its core function is to step down mainstream 10kv and 12.47kv medium-voltage grid power to standard 0.4kv three-phase power for industrial production, commercial facilities and residential power supply, and convert partial power to 0.11kv ultra-low voltage to support precision instruments, monitoring systems and small intelligent electrical equipment. It effectively solves the problem of single voltage output and poor equipment compatibility of traditional distribution transformers, realizing one machine for multiple power supply purposes.

In daily power grid operation and industrial power consumption scenarios, the 500kva/630kva oil immersed power transformer undertakes key auxiliary power management tasks. It can balance three-phase load distribution, suppress grid voltage fluctuation and stabilize terminal power quality during peak power consumption periods. The low-energy structural design reduces long-term power transmission line loss, improving the overall operating efficiency of power distribution systems. Meanwhile, it has reliable overcurrent and overvoltage resistance, which can buffer instantaneous load impact and protect downstream electrical equipment from grid surge damage, ensuring safe and stable operation of medium-load power supply systems.

3. Application Scenarios

3.1 Industrial Park Medium-Load Power Distribution

This 10kv/12.47kv oil immersed transformer is widely deployed in medium-sized industrial parks, manufacturing workshops and light industrial production bases. The 630kva high-capacity model is suitable for comprehensive industrial zones with multiple production lines and continuous high power consumption, while the 500kva model perfectly matches conventional medium-load factory power demand. The standard 0.4kv output provides stable power for industrial motors, production equipment and workshop electrical systems, and the dedicated 0.11kv low-voltage output supplies power for factory precision detection instruments, automatic control systems and on-site monitoring devices, meeting the mixed power demand of industrial production and intelligent equipment operation.

3.2 Urban and Rural Municipal Power Grid Renovation

It serves as core power distribution equipment for urban community power supply, suburban grid upgrading and rural power network reconstruction projects. Many regional municipal power grids adopt 10kv medium-voltage lines, while North American and some overseas regional grids use 12.47kv voltage standards. This dual-voltage compatible transformer can seamlessly adapt to different grid specifications, converting medium voltage to 0.4kv civilian and commercial power for residential buildings, shopping malls, office buildings and public facilities. Its fully sealed outdoor structure adapts to open-air substation installation, resisting daily weather changes and ensuring long-term stable power supply for municipal living and public services.

3.3 New Energy Station Auxiliary Power Supply

In distributed photovoltaic power stations, small wind power plants and energy storage power station projects, this multi-voltage oil immersed transformer plays an important role in power conversion and auxiliary power distribution. It converts the medium-voltage grid power or generated electric energy into 0.4kv power for station equipment operation, and provides stable 0.11kv power for new energy station monitoring instruments, communication equipment and safety protection systems. The strong environmental adaptability and low-loss operation characteristics make it suitable for outdoor unattended new energy power station operation environments, optimizing on-site power utilization efficiency.

3.4 Commercial and Public Facility Power Supply

The transformer is commonly used for centralized power distribution of schools, hospitals, logistics parks and large service facilities. These scenarios have stable medium-level power loads and diverse terminal power equipment, requiring both conventional 0.4kv power for lighting, air conditioning and office equipment and 0.11kv low-voltage power for medical precision instruments, teaching experimental equipment and intelligent monitoring systems. The 500kva and 630kva capacity grades perfectly match the power consumption scale of public facilities, with low operating noise and high operational stability, avoiding power supply fluctuation interference on public service equipment.

4. Product Features

4.1 Dual-Voltage Input & Dual-Voltage Output Compatibility

Different from ordinary single-specification transformers, this oil immersed power transformer supports dual 10kv and 12.47kv medium-voltage input adaptation, covering mainstream medium-voltage grid standards in Asia, America and other regions. It is equipped with dual 0.4kv standard industrial/civilian output and 0.11kv precision low-voltage output, realizing flexible switching of multiple voltage levels. The voltage conversion accuracy is extremely high with tiny output fluctuation, which can fully meet the power demand of conventional electrical equipment and precision intelligent equipment, with far wider application scope than traditional single-output transformers.

4.2 Reasonable 500kva & 630kva Capacity Gradient

Covering two most practical medium-capacity grades of 500kva and 630kva, the product forms a precise load matching system for medium-power scenarios. Users can select the 500kva model for stable conventional medium-load scenarios to achieve higher cost performance, and choose the 630kva model for projects with peak load fluctuations and future power expansion reserves. Both capacity specifications adopt unified production standards and structural design, with strong versatility and interchangeability, facilitating later equipment maintenance, replacement and capacity upgrade of power distribution projects.

4.3 Low-Loss Energy-Saving & High Operational Stability

Adopting high-purity oxygen-free copper winding and high-quality low-loss silicon steel core, the transformer optimizes internal magnetic circuit and circuit layout, effectively reducing no-load loss and operational heat generation. Compared with traditional old-fashioned transformers of the same capacity, the overall power transmission efficiency is significantly improved, and long-term operation can effectively reduce grid line loss and user power consumption costs. The equipment has strong anti-interference ability and load impact resistance, and can maintain stable voltage output even in fluctuating grid environments and frequent load switching scenarios.

4.4 Fully Sealed Maintenance-Free Oil Immersed Structure

The integral fully sealed corrugated oil tank design cancels the traditional oil conservator and breathing device, completely isolating internal insulating oil from external air, dust and moisture. It effectively prevents oil oxidation, emulsification and insulation aging, realizing long-term maintenance-free operation. Adopting professional vacuum drying and vacuum oil injection technology, the internal cleanliness and insulation performance are guaranteed. Daily operation only requires regular external inspection, without frequent oil detection and replacement, greatly reducing later operation and maintenance costs.

4.5 Strong Environmental Adaptability & Wide Scenario Applicability

The whole machine undergoes overall anti-corrosion, rust-proof and weather-resistant coating treatment, adapting to indoor substation and outdoor open-air installation environments. It can operate stably in high temperature, low temperature, humid and dusty harsh working conditions. The mature ONAN natural cooling system has efficient heat dissipation performance, with strong short-term overload capacity to cope with peak power consumption impact. It is compatible with 50Hz and 60Hz dual-frequency power systems worldwide, fully meeting the construction standards of global industrial and municipal power distribution projects.

5. FAQ (Frequently Asked Questions)

5.1 What are the differences and applicable scenarios between 0.11kv and 0.4kv output voltages?

The 0.4kv output is the standard universal low voltage, mainly used for conventional industrial motors, production equipment, residential lighting, commercial electrical appliances and most conventional power distribution scenarios. The 0.11kv ultra-low voltage is a special customized output, specially designed for precision instruments, intelligent monitoring equipment, medical experimental devices and low-power control systems that require low and stable voltage. This dual-output design allows one transformer to serve both conventional power loads and precision low-power equipment, avoiding the need for additional auxiliary transformers and saving project investment and installation space.

5.2 How to choose between 10kv and 12.47kv input voltage models?

Model selection is mainly based on local grid voltage standards. The 10kv input model is the mainstream specification for domestic, Asian and most European municipal and industrial power grids. The 12.47kv input version is specially adapted to North American regional power grid standards and some overseas industrial medium-voltage lines. This series of transformers is professionally calibrated for these two voltage grades, with no need for internal parameter modification. Users only need to match the model according to the actual on-site grid input voltage to ensure accurate and stable voltage conversion.

5.3 Which capacity is better, 500kva or 630kva for conventional industrial use?

For conventional medium-sized factories and industrial parks with stable daily power load, the 500kva oil immersed transformer is more cost-effective, with low idle loss and energy-saving operation. For production workshops with multiple equipment, frequent load fluctuations, obvious peak power consumption, or projects with planned capacity expansion in the next 3-5 years, the 630kva model is more suitable. It has larger overload margin and higher load-bearing capacity, which can effectively avoid equipment overload operation, voltage drop and frequent tripping during power consumption peaks, ensuring long-term safe and stable power supply.