High Quality 3 Phase 350 Kva 630kva 1000kva Oil Type Step up and Step Down Oil Immersed Transformer
1. Product Overview
This guide comprehensively introduces the high quality 3 phase 350kVA 630kVA 1000kVA oil type step up and step down oil immersed transformer, a heavy-duty, high-reliability power conversion device designed for medium and large-scale power transmission and distribution projects. As a dual-functional three-phase oil immersed step-up step-down transformer, this series integrates bidirectional voltage regulation capabilities, supporting both voltage boosting for long-distance power transmission and voltage stepping down for terminal power distribution. Covering three mainstream industrial capacities of 350kVA, 630kVA and 1000kVA, the equipment adopts mature oil-immersed cooling and insulation technology, perfectly adapting to complex industrial, utility and new energy power scenarios.
Manufactured with premium raw materials and strictly compliant with IEC international electrical standards, this oil type power transformer features excellent structural stability and ultra-low operational loss. Different from single-function transformers, the dual-purpose step up and step down design greatly improves equipment versatility, meeting the bidirectional voltage conversion demands of power grid interconnection, new energy grid connection and industrial power supply expansion. The high-quality core and winding configuration ensures continuous stable operation under full-load and overload conditions, making it a mainstream high-performance product in the current medium-capacity power transformer market.
2. Core Product Features
2.1 Dual Step-Up & Step-Down Bidirectional Voltage Conversion
The most prominent advantage of this 3 phase oil immersed transformer is its flexible bidirectional voltage regulation function. It can act as a step-up transformer to raise low generator voltage to high transmission voltage for long-distance power delivery, and also serve as a step-down transformer to reduce high grid voltage to standard low voltage for end-user power consumption. Equipped with multi-grade voltage tapping devices, the equipment can precisely adjust voltage according to actual grid operation conditions, effectively solving the problems of voltage drop in long-distance power transmission and voltage fluctuation in load-end power distribution. This dual-functional design eliminates the need for separate step-up and step-down equipment, greatly saving project investment and installation space.
2.2 Premium Oil-Immersed Cooling & Insulation System
Adopting a fully sealed oil immersed cooling system, the transformer uses high-purity insulating transformer oil as the medium for heat dissipation and electrical insulation. Through natural oil circulation inside the sealed corrugated tank, it quickly and evenly dissipates heat generated by the silicon steel core and copper windings, achieving efficient temperature control even during 24/7 continuous operation. The fully enclosed structural design prevents external moisture, dust and corrosive gases from invading the internal components, avoiding insulation aging and oil deterioration. Compared with air-cooled dry-type transformers, this oil-type transformer boasts better heat dissipation efficiency, stronger overload resistance and higher operational stability in high-temperature and high-load environments.
2.3 High-Efficiency Energy-Saving & Low-Loss Performance
This high quality industrial oil immersed transformer adopts high-grade cold-rolled oriented silicon steel sheets and high-purity copper windings, paired with an optimized core stacking process and winding structure. The precise manufacturing process effectively reduces no-load loss, load loss and magnetic leakage loss, with overall power transmission efficiency exceeding 98%. The 350kVA, 630kVA and 1000kVA capacity models all feature ultra-low power consumption, far exceeding industry energy-saving standards. Long-term operation can effectively reduce grid power waste and operational costs, delivering significant energy-saving and emission-reduction benefits for industrial parks, power stations and municipal power grid projects.
2.4 Strong Environmental Adaptability & Long Service Life
Designed for harsh outdoor and industrial operating environments, the medium capacity three-phase power transformer features a corrosion-resistant metal shell and reinforced sealing structure. It can operate stably in a wide temperature range from -25℃ to +45℃, adapting to high-temperature summer environments, cold northern regions, humid coastal areas and dusty industrial zones. The anti-aging winding insulation material and non-deteriorating insulating oil ensure long-term stable performance, with a service life of up to 30 years under normal operating conditions. The equipment supports pole-mounted, floor-mounted and substation indoor installation, with flexible deployment methods to meet diverse engineering construction needs.
2.5 Multi-Layer Safety Protection & Low-Noise Operation
The whole machine is equipped with complete safety protection mechanisms, including overvoltage protection, overcurrent protection, short-circuit resistance and lightning surge protection. It can quickly cut off faulty circuits in case of grid abnormalities or sudden load changes to protect equipment and line safety. The optimized vibration damping structure suppresses electromagnetic vibration and operating noise, achieving ultra-quiet operation without electromagnetic pollution. The fully sealed oil tank avoids oil leakage risks, meeting environmental protection requirements for industrial and urban public projects, with high safety and environmental friendliness.
3. Core Product Purposes
The core purpose of the 350kVA 630kVA 1000kVA step up and step down oil immersed transformer is to realize safe, efficient and flexible bidirectional voltage conversion and power balancing in medium and high voltage power systems. As a key hub device in power transmission and distribution links, it solves the voltage mismatch problem between power generation equipment, transmission lines and terminal power consumption equipment. When used for power generation and transmission, it steps up low-voltage electric energy generated by new energy units and generators to high voltage, reducing line transmission loss and realizing long-distance power transmission. When used for power distribution, it steps down high-voltage grid electric energy to standard low voltage that meets the usage requirements of industrial equipment and civilian electrical appliances.
In addition to basic voltage transformation functions, this high-efficiency oil type transformer also undertakes core functions such as grid load balancing, power quality optimization and power system fault isolation. It can stabilize grid voltage fluctuations, suppress harmonic interference, and improve the stability and quality of power supply. The three capacity models cover medium and large load power demands, realizing accurate load matching for different projects, avoiding equipment light-load or overload operation, and effectively reducing operational risks and energy consumption loss of the power distribution system. It is also widely used for grid interconnection and voltage matching between different voltage-level power networks, supporting flexible power dispatching of regional power grids.
4. Wide Application Scenarios
4.1 New Energy Power Generation Projects
This three-phase step-up step-down oil immersed transformer is widely used in distributed photovoltaic power stations, centralized solar farms, wind power plants and biomass power generation projects. It steps up the low-voltage electric energy generated by new energy equipment to meet grid-connected voltage standards, realizing smooth integration of new energy power into the municipal power grid. During peak power consumption periods, it can also step down grid power to supply on-site equipment, achieving bidirectional flexible power regulation for new energy power stations.
4.2 Industrial Park & Factory Power Supply
The 350kVA, 630kVA and 1000kVA high-capacity models are ideal power supply equipment for large processing factories, industrial parks, manufacturing bases and mining enterprises. It stably supplies power to production lines, mechanical equipment, electrical control systems and auxiliary facilities, adapting to long-term high-load continuous operation of industrial equipment. The strong overload resistance and stable voltage output effectively avoid production shutdowns and equipment damage caused by voltage instability, ensuring the normal operation of industrial production.
4.3 Municipal Power Grid & Substation Construction
As core distribution equipment for urban and rural power grid upgrading and substation construction, the oil immersed power distribution transformer is deployed in regional substations, community power distribution stations and rural centralized power supply points. It undertakes the task of stepping down high-voltage grid power for civilian and commercial power distribution, and can also support regional grid power transfer and voltage adjustment, improving the overall power supply capacity and stability of municipal power grids.
4.4 Commercial & Large Public Facilities
The equipment is suitable for large shopping malls, comprehensive office buildings, hotel clusters, hospital campuses, transportation hubs and other large public facilities with high power consumption. The 630kVA and 1000kVA large-capacity models can meet the centralized power demand of central air conditioning, elevator groups, lighting systems and professional electrical equipment, with low noise and high safety, fully adapting to high-standard power supply requirements of public buildings.
4.5 Remote Engineering & Temporary Power Projects
With strong environmental adaptability and flexible voltage regulation capabilities, this dual-functional transformer is also widely used in remote mountain power supply, road and bridge engineering, field exploration projects and large-scale temporary construction sites. It can adjust voltage according to on-site power generation and power consumption conditions, solving the problem of unstable power supply in remote areas and temporary engineering projects.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between a dual step-up/step-down oil immersed transformer and a single-function transformer?
Different from traditional single-function transformers that can only complete unidirectional voltage conversion, the 3 phase oil type step up and step down transformer supports bidirectional voltage regulation, which can realize both voltage boosting for power transmission and voltage reduction for power distribution in one unit. It features wider application coverage and higher equipment utilization. Single-function transformers require separate configuration for power generation and distribution scenarios, resulting in higher procurement costs and larger installation space. In contrast, the dual-functional integrated design of this product saves project investment, simplifies equipment management, and is more suitable for multi-scenario and variable-load power projects such as new energy grid connection and regional grid dispatching. Meanwhile, it retains all the advantages of traditional oil immersed transformers including low loss, high stability and long service life.
Q2: How to choose between 350kVA, 630kVA and 1000kVA capacity models for practical use?
Capacity selection of the high quality oil immersed transformer should be based on actual load power, peak power demand and future capacity expansion plans. The 350kVA model is suitable for small and medium-sized factories, small-scale photovoltaic power stations and community-level power distribution scenarios with moderate load power consumption. The 630kVA medium-large capacity model is the most versatile option, applicable to most industrial workshops, commercial complexes and conventional new energy projects, balancing cost and performance perfectly. The 1000kVA large-capacity model is designed for large industrial parks, large wind-solar power stations and central substation power distribution scenarios with high peak power consumption and intensive load. It is recommended to reserve 20%-30% spare capacity during selection to adapt to subsequent load growth and avoid long-term full-load operation.
Q3: What are the key maintenance points for long-term operation of oil immersed step-up and step-down transformers?
Although the sealed oil immersed power transformer has low maintenance requirements, standardized daily maintenance can effectively extend its service life and ensure stable operation. First, regularly inspect the oil tank for oil leakage, shell corrosion and structural deformation, and keep the installation environment dry and ventilated. Second, monitor the operating temperature and noise of the equipment; abnormal overheating or loud noise indicates potential load abnormality or internal failure, requiring timely inspection and troubleshooting. Third, conduct regular dielectric performance testing of insulating oil to ensure its cooling and insulation performance meets standards. Fourth, check the tightness of voltage tapping terminals and wiring parts to avoid poor contact. For outdoor installed equipment, regularly inspect lightning protection and waterproof sealing structures to resist harsh environmental interference. Professional comprehensive overhaul is recommended every 2-3 years to eliminate potential operational risks.
