Oil Immersed Transformer 200KVA 315KVA Models HV 19KV 21KVA Three Phases 220V/380V/110V 50Hz
Oil Immersed Transformer 200KVA 315KVA Models HV 19KV 21KVA Three Phases 220V/380V/110V 50Hz
1. Product Description
The 200KVA and 315KVA three phases oil immersed transformer is a standard medium-capacity distribution transformer designed for 19KV and 21KV high-voltage power grid systems, operating steadily at 50Hz industrial and municipal AC power frequency. This multi-specification HV oil filled power transformer features flexible high voltage input options of 19KV and 21KV, paired with three practical low voltage output grades including 220V, 380V and 110V, fully covering industrial three-phase power supply, civilian household electricity and precision low-voltage equipment power demand. Manufactured in accordance with IEC international power equipment standards, this 50Hz oil immersed distribution transformer adopts mature industrial manufacturing technology, serving as a mainstream power conversion device for medium-voltage regional power distribution projects.
Available in two classic capacity models of 200KVA and 315KVA, this three-phase oil immersed power transformer adopts high-quality low-loss grain-oriented silicon steel core and high-purity oxygen-free copper winding structure, effectively reducing no-load loss and load loss during long-term continuous operation. It adopts standard ONAN oil natural air natural cooling system and fully sealed corrugated oil tank design, with high-purity insulating oil completing internal insulation protection and circulating heat dissipation. Different from single-voltage transformers, this 19KV/21KV HV transformer supports multi-low-voltage output switching, solving the problem of voltage mismatch in mixed industrial and civilian power supply scenarios. All units undergo strict factory dielectric testing and voltage ratio calibration to ensure stable and consistent field operation performance.
2. Core Uses
This 50Hz three phases oil immersed transformer focuses on precise step-down voltage conversion for 19KV and 21KV medium-high voltage power grids, undertaking core power distribution and power quality stabilization tasks for regional power systems. Its primary function is to convert 19KV and 21KV high-voltage grid electricity into standard 380V three-phase industrial power, 220V civilian daily power and 110V special low-voltage power for precision equipment, realizing classified power supply for different terminal loads. It effectively solves the problems of high line loss, voltage fluctuation and equipment operation instability caused by direct high-voltage power transmission in medium-capacity power consumption scenarios.
Beyond basic voltage transformation, 200KVA and 315KVA HV oil immersed transformers also play a key role in grid load balancing and system operation optimization. In peak power consumption periods, the equipment can buffer instantaneous load surges and balance three-phase current distribution, avoiding local overload and terminal voltage drop. The low-loss structural design minimizes long-term power transmission energy consumption, improving the overall power supply efficiency of 50Hz power grids. Meanwhile, it provides reliable overvoltage, overcurrent and short-circuit protection for downstream electrical equipment, ensuring safe and continuous operation of industrial production lines and municipal power distribution systems.
3. Application Scenarios
3.1 Medium-Sized Industrial Factory Power Distribution
This 19KV/21KV three phases oil immersed transformer is widely applied in medium-sized processing factories, light industrial workshops and manufacturing enterprises with medium power load demand. The 315KVA high-capacity model is suitable for comprehensive workshops with multiple production lines and continuous high power consumption, while the 200KVA model perfectly matches single workshop and stable medium-load production scenarios. The 380V three-phase output provides stable power for industrial motors, mechanical processing equipment and automated production systems, while 220V and 110V outputs supply power for factory office equipment, lighting systems and precision detection instruments, meeting mixed industrial power supply needs.
3.2 Urban and Rural Municipal Power Grid Construction
It serves as core supporting equipment for urban community power supply, suburban grid upgrading and rural 19KV/21KV grade power network reconstruction projects. Many regional municipal medium-voltage power grids adopt 19KV and 21KV voltage standards, and this 50Hz oil immersed distribution transformer can perfectly adapt to local grid access requirements. It converts high-voltage grid power into 220V residential civilian power and 380V public facility power, covering daily power consumption of residential buildings, community supporting facilities, street lighting and municipal engineering equipment, ensuring stable power supply for urban and rural residents.
3.3 Industrial Park Zonal Power Supply
In standardized industrial parks and industrial gathering areas with 19KV and 21KV medium-voltage grid access, the 200KVA and 315KVA multi-output oil immersed transformers are used for partition centralized power distribution. Industrial parks have diverse power consumption types, requiring both high-power three-phase 380V power for production equipment and low-power 220V/110V power for park management, monitoring and auxiliary facilities. The fully sealed outdoor structure adapts to open-air substation installation in industrial parks, resisting dust, humidity and temperature changes, and supporting long-term unattended continuous power supply for park facilities.
3.4 Field Engineering and Auxiliary Power Projects
This durable HV oil immersed transformer is also suitable for water conservancy projects, road construction, field exploration and remote area power supply projects. Field engineering sites mostly adopt 19KV and 21KV temporary medium-voltage power lines, and the multi-voltage output design can flexibly match construction machinery, temporary office equipment and on-site monitoring devices. The 50Hz fixed frequency design adapts to conventional domestic and regional engineering power standards, with strong environmental adaptability, which can operate stably in outdoor open-air and harsh field working environments.
4. Product Features
4.1 Dual HV Voltage Adaptation & Multi-LV Output Matching
This three phases oil immersed transformer supports dual high voltage input of 19KV and 21KV, covering two mainstream medium-high voltage grid specifications, with strong regional grid compatibility. It integrates three low voltage outputs of 220V, 380V and 110V in one unit, realizing seamless matching of industrial three-phase power, civilian single-phase power and precision equipment low-voltage power. The voltage conversion accuracy is high with tiny output fluctuation, completely solving the voltage adaptation problems of diversified terminal loads, and avoiding repeated equipment investment caused by single voltage function of traditional transformers.
4.2 200KVA & 315KVA Graded Capacity Selection
Covering two practical medium-capacity grades, the product forms a precise load matching system for medium-power consumption scenarios. The 200KVA model features low idle loss and high cost performance, suitable for stable medium-load power supply scenarios. The 315KVA model has larger load-bearing margin and stronger overload resistance, adapting to scenarios with frequent load fluctuations and reserved power expansion demand. Both capacity models adopt unified manufacturing standards and structural design, with excellent versatility and interchangeability, facilitating later equipment replacement and project capacity upgrading.
4.3 Stable 50Hz Fixed Frequency Operation
Professionally optimized for 50Hz conventional power grid frequency, this oil immersed power transformer has calibrated internal magnetic circuit and winding parameters for fixed-frequency operation. It maintains stable magnetic flux circulation and voltage conversion efficiency under long-term 50Hz operating conditions, without frequency deviation, extra heat generation or power attenuation. It fully complies with national and regional 50Hz industrial and municipal power grid standards, ensuring consistent and reliable power supply quality for long-term grid operation.
4.4 Low-Loss Energy-Saving & High Operational Stability
Adopting high-performance low-loss silicon steel core and high-conductivity pure copper winding, the transformer effectively reduces magnetic flux leakage, no-load loss and load loss during operation. Compared with traditional old-fashioned medium-capacity transformers, 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 short-circuit impact resistance, which can maintain stable voltage output even under variable load conditions and harsh grid environments.
4.5 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 prevents oil oxidation, emulsification and insulation aging, realizing long-term maintenance-free operation. Equipped with mature ONAN natural cooling system, it has uniform and efficient heat dissipation performance, which can quickly export heat generated by full-load operation. The outer shell undergoes anti-corrosion and weather-resistant treatment, adapting to indoor and outdoor installation environments with long service life and low later maintenance cost.
5. Frequently Asked Questions (FAQ)
5.1 How to choose between 200KVA and 315KVA transformer models?
Model selection depends on actual on-site load size and power fluctuation frequency. The 200KVA three phases oil immersed transformer is more suitable for scenarios with stable medium load, single workshop power supply and low peak-valley load difference, with lower no-load loss and better energy-saving effect. The 315KVA model is recommended for industrial parks, multi-equipment workshops and projects with obvious load fluctuations or future power expansion plans. It has larger overload tolerance and can effectively avoid overload tripping and voltage drop during power consumption peaks, ensuring long-term stable operation of the power distribution system.
5.2 What are the differences and applicable scenarios for 220V, 380V and 110V outputs?
The three low-voltage outputs correspond to different professional power supply scenarios. The 380V three-phase output is the core industrial power supply, suitable for all kinds of industrial motors, production lines and high-power mechanical equipment. The 220V output is standard civilian voltage, used for residential power supply, office equipment, lighting and daily electrical appliances. The 110V low-voltage output is specially designed for precision instruments, monitoring systems and special low-power electrical equipment that require low and stable voltage. The multi-output design realizes one machine for multiple purposes, greatly improving equipment utilization rate and saving project investment cost.
5.3 Can this 19KV/21KV HV transformer adapt to outdoor long-term operation?
Yes, this 50Hz oil immersed transformer is fully suitable for long-term outdoor unattended operation. It adopts a fully sealed anti-aging oil tank structure with excellent waterproof, dustproof and moisture-proof performance, which can effectively resist external harsh environmental erosion. The overall anti-corrosion and weather-resistant shell treatment adapts to high temperature, low temperature, rainy and dusty outdoor working conditions. The mature oil circulation heat dissipation system ensures stable temperature control during full-load operation. With low failure rate and maintenance-free characteristics, it is the ideal power transformation equipment for outdoor municipal substations and industrial park open-air power distribution stations.
