167kva 34.5kv to 240v/480v single phase Oil Immersed Transformer

167kva 34.5kv to 240v/480v single phase Oil Immersed Transformer

1. Product Description

The 167kVA 34.5kV to 240V/480V single phase oil immersed transformer is a high-capacity ANSI/CSA standard single-phase distribution transformer tailored for North American 34.5kV medium-voltage utility power grids. As a heavy-duty oil-filled step-down power transformer widely deployed in suburban, rural and industrial single-phase power distribution networks, this 34.5kV 240/480V single phase oil immersed transformer efficiently converts 34.5kV high medium voltage into stable dual 240V and 480V low-voltage output, perfectly matching high-power residential, light industrial and commercial single-phase electrical load requirements. Manufactured in strict accordance with IEEE C57.12, DOE 2016 energy efficiency standards and UL certification specifications, this oil immersed single-phase power transformer undergoes full factory testing for insulation strength, loss performance and short-circuit resistance to ensure reliable long-term field operation.

Built with premium low-loss grain-oriented silicon steel core and high-purity copper windings, the 167kVA single phase 34.5kV to 240V/480V oil immersed power transformer effectively minimizes no-load excitation loss and temperature rise under continuous heavy load. Adopting fully sealed welded steel tank structure and ONAN mineral oil immersion cooling system, this robust oil filled distribution transformer prevents insulating oil oxidation, moisture ingress and internal dust accumulation during outdoor service. Compared with small and medium-capacity single-phase transformers, this 167kVA high-capacity model delivers stronger overload tolerance, more stable voltage regulation and longer service life. It supports both pole-mounted and pad-mounted installation, making it a versatile and durable power transformation solution for high-demand single-phase power supply projects in 34.5kV grid systems.

2. Technical Parameters

3. Core Purpose

The core purpose of the 167kVA 34.5kV to 240V/480V single phase oil immersed transformer is to deliver high-capacity, stable and safe voltage step-down conversion for 34.5kV medium-voltage single-phase power distribution systems. This heavy-duty oil-filled single-phase step-down transformer resolves the voltage mismatch between high-voltage overhead transmission lines and high-power single-phase end loads, converting 34.5kV medium-high grid voltage into standard 240V and 480V dual low-voltage power that complies with North American industrial and commercial power supply norms.

In daily utility grid operation, this high-capacity single phase oil immersed distribution transformer undertakes critical functions including grid voltage stabilization, load harmonic suppression and circuit safety isolation. It maintains balanced dual 240V/480V output under heavy continuous loads, effectively mitigating voltage drop and current surge caused by frequent peak load switching. Designed specifically for high-demand decentralized single-phase power loads, it eliminates power instability and equipment burnout risks common with low-capacity transformers, ensuring consistent power quality and reliable power supply for high-power residential communities, small industrial facilities and commercial service zones connected to 34.5kV power grids.

4. Application Scenarios

Thanks to its 167kVA large single-phase capacity, excellent overload resistance and all-weather outdoor stability, the 167kVA 34.5kV/240V/480V single phase oil immersed power transformer is widely adopted in high-load single-phase power supply scenarios across North American utility grids. It serves as the core power transformation equipment for 34.5kV grid upgrading, industrial supporting and high-power civilian power distribution projects:

• High-power Residential Community Power Supply: Ideal for high-end suburban villa clusters and large rural centralized residential areas with high household power consumption. The 480V high-voltage single-phase output supports high-power household equipment, central air conditioning and intelligent building systems, while 240V output meets daily lighting and conventional load demands.

• Light Industrial Single-phase Power Distribution: Suitable for small processing factories, mechanical repair workshops, woodworking and metal processing facilities with high single-phase power load. It provides stable long-term power supply for high-power industrial machinery and production auxiliary equipment.

• Medium & Large Commercial Facilities: Perfect for suburban shopping centers, large supermarket outlets, business office buildings and community comprehensive service centers. It reliably supports commercial refrigeration systems, office electrical equipment and public facility power consumption.

• 34.5kV Urban & Rural Grid Renovation & Capacity Expansion: Widely used for upgrading outdated rural and suburban power grids, replacing old low-capacity high-loss transformers to improve regional power supply capacity, reduce grid loss and enhance overall power supply reliability.

• Remote Infrastructure & Field Station Power: Applied in remote highway service stations, large scenic area supporting facilities, field monitoring bases and communication hub stations. Its strong outdoor adaptability supports long-term unattended heavy-load operation in remote areas.

• Medium-sized Distributed New Energy Grid Connection: Matched with large residential rooftop photovoltaic systems and decentralized small-scale wind power projects. It completes stable voltage conversion and grid-connected power regulation for new energy generation equipment, ensuring grid-friendly power delivery.

5. Product Features

This 167kVA 34.5kV to 240V/480V single phase oil immersed transformer adopts upgraded heavy-duty single-phase transformer design and ANSI-standard manufacturing technology. It outperforms conventional medium-capacity single-phase transformers in load capacity, operational stability and durability, fully adapting to heavy-load continuous operation requirements of modern 34.5kV medium-voltage power grids:

• Large Capacity & Strong Overload Resistance: Featuring 167kVA high rated capacity, this single-phase oil immersed transformer easily handles high-power single-phase loads that ordinary small-capacity transformers cannot support. It maintains stable operation under long-term full-load and short-term peak overload conditions, effectively avoiding shutdown and burnout faults caused by load saturation.

• Low Energy Loss & High Operational Efficiency: Equipped with high-permeability low-loss silicon steel core and high-purity copper winding, the equipment significantly reduces no-load magnetic loss and load copper loss. All loss parameters meet DOE premium energy efficiency standards, effectively lowering long-term grid operation energy consumption and reducing operational costs for power utilities.

• Dual Stable 240V/480V Voltage Output: Optimized professional single-phase winding structure ensures precise and balanced dual 240V and 480V voltage output. The multi-grade off-circuit tap changer flexibly adapts to regional 34.5kV grid voltage deviation, suppressing harmonic interference and voltage fluctuation to guarantee stable terminal power quality.

• Fully Sealed & All-weather Weather Resistance: Integral fully sealed welded steel tank structure completely isolates internal core, windings and insulating oil from external humid air, dust and corrosive substances. The high weather-resistant electrostatic spraying shell resists ultraviolet aging, rain erosion, frost and snow damage, supporting 24/7 outdoor unattended operation in complex climates.

• High Insulation Strength & Safety Performance: Strict 34.5kV high-voltage insulation design with 150kV BIL lightning impulse resistance delivers excellent lightning protection, over-voltage resistance and short-circuit impact resistance. The whole machine has low failure rate and high operational safety, effectively protecting power grid and terminal high-power equipment.

• Dual Installation & Low Maintenance Design: Compact and robust structure supports both pole-mounted and pad-mounted installation, adapting to various field site conditions. The fully sealed oil tank requires no frequent oil replenishment or routine internal maintenance, greatly simplifying daily inspection work and lowering long-term maintenance expenses.

6. FAQ (Frequently Asked Questions)

Q1: What are the application advantages of 167kVA single phase oil immersed transformers compared with smaller capacity models?

The 167kVA 34.5kV 240/480V single phase oil immersed transformer is a high-capacity upgrade of conventional small single-phase transformers, designed specifically for heavy single-phase loads. Unlike 25kVA, 37.5kVA or 50kVA models that are only suitable for ordinary household light loads, this 167kVA unit supports high-power industrial and commercial single-phase equipment operation with stronger overload tolerance and more stable voltage output. It effectively solves the problem of insufficient power supply capacity and frequent overheating faults of small transformers in high-demand scenarios. Meanwhile, it retains the advantages of simple single-phase structure, low no-load loss and flexible installation, providing higher cost performance and operational stability for 34.5kV high-load single-phase power distribution projects.

Q2: Can this 34.5kV high-capacity single phase transformer operate stably in harsh outdoor environments?

Absolutely. This ANSI-certified 167kVA oil immersed distribution transformer is fully optimized for harsh outdoor utility operating conditions. The fully sealed integral steel tank completely prevents insulating oil moisture, aging and internal insulation damp failure caused by long-term outdoor exposure. The heavy-duty anti-corrosion and weather-resistant coating can withstand long-term ultraviolet radiation, heavy rain erosion, low-temperature freezing and high-temperature aging. With a wide operating temperature range of -40℃ to +45℃ and professional ONAN self-cooling system, it maintains stable heat dissipation and electrical performance under full load all year round, fully meeting long-term unattended outdoor pole-mounted and pad-mounted operation requirements.

Q3: What routine maintenance is required for a 167kVA 34.5kV single phase oil immersed transformer?

This high-capacity single-phase oil immersed transformer features low daily maintenance requirements and stable long-term performance. Daily work mainly includes regular visual inspection of the oil tank welding seams and sealing points to check for oil leakage, and confirmation of normal insulating oil level and oil clarity. Operators need to clean dust and debris on the radiator surface regularly to ensure unobstructed heat dissipation and prevent overheating under heavy load. Periodically test winding insulation resistance and terminal voltage balance to eliminate potential insulation aging risks. Avoid long-term overload operation in daily use. With standardized simple routine maintenance, the equipment can achieve a service life of more than 20 years with stable operational performance.