125kVA Oil Immersed Step Down Power Transformer
Capacity: 125kVA
Voltage: Input 11kV → Output 0.4kV
Delivery Year: 2021
Country: Vietnam
Key Advantages:
The oil immersed power transformer's efficient heat-dissipation design ensures long-term stable operation in high-temperature environments.
The Step Down Power Transformer precisely meets low-voltage requirements for industrial zones, reducing distribution losses.
The oil filled transformer's sealed construction and insulation performance effectively address humid climate challenges.
Have questions? GNEE sales representatives are available for live chat now
Send E-mail: sales@gneeelectric.com
Tel: +8615824687445
Work Principle and Advantages of Step Down Power Transformer
Work Principle:
The Step Down Power Transformer utilizes electromagnetic induction to transfer electrical energy from a high-voltage side (e.g., 11kV) to a low-voltage side (e.g., 0.4kV), reducing voltage through a turns ratio between the primary and secondary coils. Its core structure relies on the oil immersed power transformer's oil-filled design:
Oil immersed transformer (oil filled transformer) coolant circulates via convection to dissipate heat from coils and the core, ensuring sustained operation under heavy loads.
The oil-immersion environment enhances insulation and suppresses electric arc risks, improving safety.
Core Advantages:
High Efficiency:
The oil-cooling system reduces energy loss, achieving efficiency over 98%.
Stable Reliability:
The oil immersed power transformer design (operating in temperatures from -30°C to +50°C) adapts to harsh environments and minimizes failures.
Customizable Flexibility:
The Step Down Power Transformer can be tailored to diverse voltage ratios for industrial, commercial, and infrastructure applications.
Environmental Compliance:
SF₆-free design meets global environmental standards.
Products parameter
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Product Testing
Our company adheres to international standards (IEC 60076/UL 1417) for rigorous testing of the Step Down Power Transformer, with a focus on the oil filled transformer's performance:
Short-Circuit Impedance Test:
Validates the mechanical strength and tolerance of the oil immersed power transformer during short-circuit conditions.
Insulation Voltage Test:
Ensures the oil filled transformer's insulation oil withstands ≥35kV breakdown voltage for long-term safety.
Load Temperature Test:
Simulates full-load scenarios to monitor cooling efficiency and ensure temperature rise stays below national standards.
Seal Integrity Test:
Checks weld joints via vacuum oil injection and pressure testing to eliminate leakage risks, ensuring the Step Down Power Transformer's long-term reliability.
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Why choose us?
GNEE Group:
Global Transformer Supply Chain Integration Expert (2008 - Present)
Founded in 2008, GNEE Group has undergone fifteen years of deep industry cultivation, successfully transforming from a regional trader to a global supply chain management expert. As a pioneer in the integration of the steel industry chain, the group has established a full-cycle value system that spans raw material procurement, production coordination, logistics optimization, and terminal services, setting an innovative operational benchmark in the global transformer distribution sector. In the era of Industry 4.0, GNEE Group is accelerating towards its goal of becoming a global integrator oftransformer industry value through digital restructuring and green supply chain construction.
SGS certification certificate
Production environment
Our factory
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