1000Kva 35Kv Three Phase Oil Immersed Transformers

1000Kva 35Kv  Three Phase Oil Immersed Transformers

1. Product Description

1000Kva 35Kv Three Phase Oil Immersed Transformers are industrial-grade medium-large capacity power distribution transformers widely deployed in 35kV medium-voltage power grid systems, industrial substations and municipal power supply projects. Belonging to the mainstream S11 and S13 low-loss transformer series, these 35kV oil filled distribution transformers comply fully with IEC 60076 and GB/T 1094 international industry standards, serving as core step-down power conversion equipment for medium and heavy-load power consumption scenarios. Designed to bridge the voltage gap between 35kV high-voltage transmission lines and low-voltage terminal equipment, this three-phase oil immersed transformer steadily converts 35kV medium voltage into standard 0.4kV low-voltage three-phase power, meeting continuous and stable power demand for industrial production, urban infrastructure and large-scale residential clusters.

Built with high-quality low-loss grain-oriented silicon steel core and 100% oxygen-free copper three-phase windings, the 1000Kva 35Kv Three Phase Oil Immersed Transformers effectively reduce no-load excitation loss and full-load operating loss, achieving excellent energy-saving performance in long-term grid operation. Adopting a standard Dyn11 connection group, the equipment optimizes three-phase voltage and current balance, suppresses grid harmonics and zero-sequence current, and solves common power quality problems such as unbalanced three-phase load and terminal voltage fluctuation in practical power distribution work. Featuring a fully sealed corrugated steel oil tank and conventional ONAN oil natural air natural cooling system, the transformer isolates internal core, windings and insulating oil from external dust, moisture and corrosive air. This mature oil-immersed structural design avoids insulating oil aging, moisture penetration and oil leakage faults, ensuring stable and reliable all-weather outdoor operation. With 1000kVA rated capacity, this 35kV three-phase oil immersed transformer fills the load gap between small-capacity 800kVA and large-capacity 1250kVA models, delivering balanced cost performance and load-bearing capacity for various medium-heavy power distribution projects.

2.Technical Parameters

3. Core Purpose

The core purpose of 1000Kva 35Kv Three Phase Oil Immersed Transformers is to provide stable, high-efficiency and safe medium-to-low voltage conversion for 35kV urban and rural power distribution networks and industrial power supply systems. As a key medium-large capacity terminal power transformation device, this low-loss oil immersed power transformer solves the voltage mismatch between 35kV overhead transmission lines and low-voltage industrial and civil electrical equipment, converting fluctuating medium voltage into standardized 400V three-phase stable power that meets global electrical safety codes.

In daily grid and industrial operational scenarios, this 35kV three-phase oil filled transformer undertakes multiple critical core functions including terminal grid voltage stabilization, three-phase load balancing, power harmonic suppression and circuit safety isolation. With 1000kVA moderate large capacity, it effectively makes up for the insufficient load margin of 800kVA small-capacity transformers and avoids the excessive idle energy loss of 1250kVA and above large-capacity models. It can steadily cope with long-term medium-heavy load operation and seasonal peak power surges, reduce terminal voltage drop and power grid transmission loss, optimize overall power supply quality of 35kV distribution networks, and ensure continuous and reliable power guarantee for industrial production, municipal infrastructure and large residential community power consumption.

4. Application Scenarios

Benefiting from moderate large load capacity, ultra-low operational loss, strong short-circuit resistance and excellent outdoor environmental adaptability, 1000Kva 35Kv Three Phase Oil Immersed Transformers cover mainstream medium-heavy load power distribution scenarios of 35kV medium-voltage grids. They are the most widely used power transformation equipment for grid renovation, industrial supporting, municipal engineering and new energy grid connection projects:

• Medium and Large Industrial Factory Power Supply: Ideal for machinery manufacturing plants, building materials processing factories, light chemical enterprises and food processing industrial parks. The 1000kVA stable load capacity fully meets long-term continuous production power demand and short-term equipment start-up peak load, ensuring stable operation of industrial production lines and mechanical equipment.

• 35kV Urban & Rural Power Grid Upgrading: Widely applied in capacity expansion and loss reduction transformation of aging urban and rural medium-voltage power grids. Replacing outdated high-loss old transformers, this modern low-energy-consumption oil immersed transformer effectively improves regional power supply capacity, stabilizes terminal voltage quality and reduces long-term grid operation costs.

• Municipal Public Infrastructure Projects: Suitable for urban sewage treatment plants, water supply pump stations, highway service areas, railway supporting facilities and county-level comprehensive substations, providing 24-hour uninterrupted stable three-phase power support for municipal public facilities.

• Large Residential & Commercial Cluster Power Distribution: Perfect for high-density urban residential communities, community commercial zones and comprehensive service facilities. It balances three-phase load distribution, avoids voltage fluctuation and power supply instability caused by concentrated peak power consumption of residents and merchants.

• Distributed New Energy Grid Connection: Matched with medium-sized centralized photovoltaic power stations, small wind power generation systems and energy storage supporting projects. It completes stable voltage conversion and grid-connected power quality regulation, suppresses new energy grid-connected harmonics, and ensures safe and efficient grid access of decentralized new energy power.

• Mining & Field Engineering Power Supply: Adaptable for open-pit mining bases, water conservancy engineering sites and remote large-scale field construction projects. With strong anti-interference and overload resistance, it adapts to complex outdoor power consumption environments and provides reliable heavy-load power guarantee for engineering operations.

5. Product Features

1000Kva 35Kv Three Phase Oil Immersed Transformers adopt upgraded S13 ultra-low-loss manufacturing technology and mature industrial oil-immersed cooling structure. Compared with traditional old-generation 35kV transformers and adjacent capacity models, this medium-large capacity three-phase transformer has comprehensive advantages in energy-saving efficiency, operational stability, safety durability and economic performance, fully adapting to long-term unattended heavy-duty operation of 35kV medium-voltage power grids:

• Optimal Capacity Matching & Strong Load Adaptability: The 1000kVA rated capacity fills the market gap between small and large-capacity transformers, perfectly matching medium-heavy load power demand of industrial parks and municipal substations. It reserves sufficient peak load margin to cope with seasonal power surges and equipment startup impact load, avoiding overload tripping and idle energy waste.

• Ultra-low Energy Loss & High Operational Efficiency: Adopting high-permeability low-loss silicon steel core and high-purity oxygen-free copper winding, the transformer minimizes no-load magnetic loss and full-load operating loss. All energy efficiency indicators meet national first-class energy efficiency standards, effectively reducing long-term power consumption and grid operation costs with remarkable energy-saving benefits.

• Dyn11 Balanced Three-phase Output & High Power Quality: Standard Dyn11 vector group design realizes precise balance of three-phase voltage and current, effectively inhibiting zero-sequence current and power grid harmonics. It maintains stable voltage output under unbalanced load conditions, significantly improves terminal power quality and reduces electrical equipment failure rate caused by power imbalance.

• Enhanced Insulation & Lightning Protection Performance: Adopting enhanced 35kV medium-voltage insulation structure and 150kV BIL lightning impulse resistance design, the transformer has excellent over-voltage resistance and lightning surge protection capability. It effectively resists external lightning strike and grid sudden overvoltage interference, improving overall grid operation safety.

• Fully Sealed Anti-aging & Leak-proof Structure: Integral welded corrugated oil tank adopts fully sealed maintenance-free design, completely isolating internal core, windings and insulating oil from external humid air, dust and corrosive substances. It prevents oil deterioration and insulation aging, eliminates common oil leakage faults of traditional transformers, and extends equipment service life.

• Efficient ONAN Self-cooling & Low Maintenance: Natural oil circulation and air natural heat dissipation mode ensure uniform and efficient heat dissipation, quickly discharging internal heat generated by long-term full-load operation. The whole machine adopts heavy-duty anti-corrosion spraying process, adapting to all-weather outdoor harsh environments. The modular structure simplifies daily maintenance work with low failure rate and long-term operational stability.

6. FAQ (Frequently Asked Questions)

Q1: Why choose 1000kVA 35kV three-phase oil immersed transformer instead of 800kVA or 1250kVA models?

In actual engineering and grid renovation projects, the 1000Kva 35Kv Three Phase Oil Immersed Transformer has the best comprehensive cost performance among adjacent capacity models. Compared with 800kVA transformers, it has larger load margin and stronger peak load tolerance, which can fully meet the power demand of subsequent load growth and avoid equipment overload operation. Compared with 1250kVA large-capacity transformers, it has lower no-load loss and idle power consumption under conventional medium-heavy load operation, effectively reducing long-term operational energy costs. This model is specially tailored for standard industrial parks and municipal substations with stable medium-heavy load, balancing power supply stability and energy-saving economy perfectly.

Q2: What are the environmental adaptability advantages of 35kV 1000kVA oil immersed transformers?

This industrial-grade 1000kVA 35kV oil immersed distribution transformer is fully optimized for outdoor unattended operation. The fully sealed corrugated oil tank structure completely blocks external moisture, dust and corrosive gas, preventing internal insulation damp and insulating oil aging. The heavy-duty anti-corrosion and ultraviolet-resistant shell can resist extreme high and low temperatures, heavy rain erosion, wind sand and frost damage. Equipped with standard ONAN natural cooling system, it maintains stable heat dissipation efficiency in high-temperature summer environments and normal startup operation in low-temperature winter environments. With professional 35kV high-grade insulation and lightning protection design, it can operate stably in complex outdoor field, suburban and rural grid environments all year round.

Q3: What daily maintenance work is required for a 1000Kva 35Kv Three Phase Oil Immersed Transformer?

This medium-large capacity 35kV oil immersed transformer features low daily maintenance threshold and stable long-term performance. Daily routine inspection mainly includes checking oil tank welding seams, sealing points and radiator surfaces for oil leakage, deformation and corrosion, and confirming insulating oil level and oil clarity are within standard ranges. Operators need to clean radiator dust regularly to ensure unobstructed heat dissipation and prevent overheating during peak loads. It is necessary to periodically test winding insulation resistance, three-phase voltage balance and fasten high and low voltage wiring terminals. Long-term overload operation and frequent voltage surge impact should be avoided. With standardized simple daily maintenance, the transformer can maintain stable working performance for more than 25 years of service life.