3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer

3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva  Oil Immersed Transformer

1. Product Description

3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer is a professional series of medium-capacity three-phase oil immersed step-up power transformers developed for low-to-medium voltage conversion in modern power distribution and new energy grid integration projects. Covering three mainstream industrial capacities of 250kVA, 315kVA and 400kVA, this 10kV class step-up transformer is designed to convert standard 400V three-phase low-voltage electricity into stable 10kV medium-voltage power, solving long-standing issues such as excessive line loss, serious voltage drop and unqualified grid-connected voltage in low-voltage long-distance power transmission scenarios. Manufactured in strict accordance with IEC 60076 international power transformer standards and national low-loss transformer specifications, this oil filled step-up transformer adopts upgraded S13 low-loss manufacturing technology, which is far more energy-efficient and stable than traditional old-generation power transformation equipment.

Different from conventional step-down distribution transformers used for terminal power consumption, this 400V to 10kV oil immersed step-up transformer focuses on front-end power boosting and power quality optimization. It adopts high-purity oxygen-free copper three-phase windings and high-permeability grain-oriented silicon steel core materials, effectively reducing no-load magnetic loss and full-load operating heat generation during voltage conversion. The optimized Yd11 vector group structure ensures balanced three-phase voltage and current output, which can effectively filter grid harmonics, restrain current imbalance and improve the overall stability of power systems. Equipped with a fully sealed corrugated oil tank and mature ONAN oil natural air natural cooling system, the equipment completely isolates internal insulating components from external dust, moisture and corrosive pollutants, avoiding insulating oil aging, damp insulation and common oil leakage failures. With flexible multi-capacity matching and reliable outdoor adaptability, this 3-phase 10kV step-up oil immersed transformer has become the preferred power conversion equipment for distributed photovoltaic power stations, rural grid upgrading and industrial temporary power boosting projects.

2. Main Technical Parameters

The following table shows complete standardized technical parameters of 3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer. All electrical performance indicators, cooling modes, insulation levels and safety specifications meet first-class energy efficiency standards and grid access acceptance requirements, supporting accurate model selection, professional on-site installation and long-term stable operational management:

3. Core Purpose

The core purpose of 3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer is to solve the practical problems of low-voltage power transmission limitations and unqualified grid-connected voltage in medium-capacity power engineering. In distributed power generation, remote power supply and industrial self-power scenarios, most on-site power sources output 400V three-phase low voltage, which cannot support long-distance stable power transmission and fails to meet 10kV medium-voltage grid access standards. This professional oil immersed step-up transformer realizes precise voltage elevation, stably boosting 400V low-voltage electricity to standard 10kV medium-voltage electricity to adapt to regional medium-voltage power grid operation specifications.

In actual power system operation, this three-phase step-up transformer undertakes multiple key core functions including power transmission loss reduction, grid power quality optimization, load balancing and circuit safety isolation. The 250kVA model is suitable for conventional medium-light load power boosting, the 315kVA model is the most widely used universal capacity for standard engineering projects, and the 400kVA high-capacity version meets concentrated medium-load power conversion demands. By upgrading voltage level, the equipment effectively reduces line current and long-distance transmission loss, improves remote power supply stability, filters new energy power generation harmonics, and ensures safe, compliant and efficient grid connection for medium-capacity distributed power stations, providing reliable voltage conversion support for rural power grid upgrading and outdoor temporary power projects.

4. Application Scenarios

With multi-capacity flexible matching, low-loss operation, stable step-up performance and excellent outdoor environmental adaptability, 3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer covers mainstream medium-capacity 400V to 10kV power boosting scenarios. It is the most cost-effective and stable power transformation equipment for new energy grid integration, rural grid renovation and industrial engineering power supply:

• Medium-capacity Distributed Photovoltaic Grid Connection: Widely applied for industrial rooftop photovoltaic power stations and village-level centralized solar power projects. It boosts 400V low-voltage power generated by photovoltaic modules to 10kV medium voltage, realizing standardized grid-connected transmission and solving the problem of low-voltage power inability for long-distance grid access.

• Rural & Remote Power Grid Upgrading: Ideal for mountainous areas, remote villages and suburban grid renovation. Long-distance 400V low-voltage transmission easily causes severe voltage drop and unstable power supply; 10kV step-up power transmission effectively reduces line loss and improves terminal power supply quality for remote users.

• Outdoor Engineering Temporary Power Supply: Suitable for road construction, water conservancy projects, mining operations and field engineering sites. It boosts 400V generator temporary power to 10kV medium voltage for long-distance power supply to remote construction sections, eliminating on-site power supply dead zones.

• Small & Medium Wind Power Generation Systems: Matched with decentralized wind turbine equipment, converting fluctuating 400V wind power into stable 10kV medium voltage. It optimizes grid-connected power quality, suppresses power fluctuation and improves new energy power utilization efficiency.

• Industrial Self-provided Power Generation Projects: Used for factory waste heat power generation and emergency power generation systems. It elevates self-generated 400V low-voltage electricity to 10kV medium voltage for internal factory power distribution or surplus power grid-connected transmission, realizing efficient energy reuse.

• Township Substation Supporting Facilities: Serves as core voltage conversion equipment for township small distribution substations, providing stable 10kV medium-voltage power sources for regional power distribution networks and realizing refined grid power management.

5. Product Features

3 Phase 10kv 400v Step Up Transformer Electricity 250kva 315kva 400kva Oil Immersed Transformer adopts upgraded S13 ultra-low-loss oil immersed manufacturing technology and professional step-up winding optimization design. Compared with dry-type step-up transformers and traditional high-loss oil immersed products, this series has outstanding practical advantages in operational stability, energy-saving performance and environmental adaptability, fully adapting to long-term unattended outdoor heavy-duty operation:

• Three-capacity Flexible Project Matching: Covering 250kVA, 315kVA and 400kVA three mainstream medium capacities, it can accurately match different load demands of various engineering projects. Users can select targeted models according to actual power generation capacity and transmission load, effectively avoiding equipment capacity waste or insufficient load margin, with extremely high project compatibility.

• Stable 400V to 10kV Step-up Performance: Optimized Yd11 three-phase balanced winding structure ensures accurate and consistent voltage elevation, effectively inhibits three-phase current imbalance and power grid harmonics. Even facing fluctuating input voltage from new energy power generation equipment, it can maintain stable 10kV output voltage, ensuring reliable power quality for subsequent transmission and grid connection.

• Ultra-low Loss & High Energy-saving Efficiency: Adopting high-conductivity oxygen-free copper windings and high-permeability low-loss silicon steel core, the transformer greatly reduces no-load excitation loss and full-load operating loss during voltage conversion. Long-term operational power consumption is significantly lower than traditional transformers, bringing continuous energy-saving and cost-reducing benefits for power grid and project operation.

• Strong Overload & Short-circuit Resistance: Internal windings adopt integral reinforcement and anti-shock structural design, with strong tolerance to instantaneous overload and short-circuit impact. It can cope with frequent load fluctuation of new energy power generation and sudden current surge of temporary engineering power supply, effectively reducing equipment failure rate and improving operational safety.

• Fully Sealed Maintenance-free Oil Immersed Structure: Integral welded corrugated oil tank forms a fully sealed closed structure, completely isolating internal insulating oil and core windings from external humid air, dust and corrosive substances. It prevents insulating oil aging and insulation damp, eliminates traditional oil leakage faults, and realizes long-term maintenance-free outdoor operation.

• Superior All-weather Outdoor Adaptability: Adopting heavy-duty anti-corrosion electrostatic spraying process and 10kV high-grade insulation configuration, the equipment resists high temperature, low temperature, rain erosion and wind sand aging. The mature ONAN natural cooling system ensures uniform and stable heat dissipation, supporting 24-hour uninterrupted operation in rural, field and other harsh outdoor environments.

6. FAQ (Frequently Asked Questions)

Q1: How to choose between 250kVA, 315kVA and 400kVA 400V to 10kV oil immersed step-up transformers?

Capacity selection depends on actual continuous operating load and future load expansion plans. The 250kVA model is suitable for small-scale distributed photovoltaic projects and light-load rural grid upgrading, featuring lower no-load loss and better energy-saving performance under light-load operation. The 315kVA capacity is the most versatile standard model, perfectly matching most conventional medium-capacity new energy grid connection and township power renovation projects with balanced cost performance and load capacity. The 400kVA high-capacity version is recommended for medium-large centralized power generation projects and engineering scenarios with potential load growth, reserving sufficient peak load margin to avoid equipment overload and later equipment replacement.

Q2: What are the practical advantages of oil immersed step-up transformers over dry-type step-up transformers?

For outdoor long-term unattended operation and engineering temporary power scenarios, oil immersed step-up transformers have more prominent practical advantages. First, the ONAN oil natural circulation cooling system provides more uniform and stable heat dissipation, with stronger continuous full-load operation capability and better transient overload resistance than dry-type equipment. Second, the fully sealed oil tank structure has excellent moisture-proof, dust-proof and anti-aging performance, adapting to complex outdoor harsh environments where dry-type transformers are prone to damp failure and aging damage. In addition, this series of 10kV oil immersed transformers has lower manufacturing cost, longer service life and simpler daily maintenance, which is more suitable for large-scale popularization in power grid renovation and new energy projects.

Q3: Can this 3-phase 10kV step-up transformer adapt to unstable new energy power input?

Yes, this medium-capacity 400V to 10kV oil immersed step-up transformer is specially optimized for new energy power generation characteristics. The Yd11 three-phase balance structure can effectively buffer input voltage fluctuation caused by sunlight and wind speed changes, automatically adjust three-phase current balance, and stabilize 10kV medium-voltage output. Meanwhile, the built-in harmonic suppression capability can filter most power clutter generated by new energy inverter equipment, effectively improving grid-connected power quality. The excellent short-circuit withstand and transient overload resistance can cope with instantaneous power surge during equipment startup and operation, ensuring long-term safe and stable grid-connected operation of distributed power systems.