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Automatic Oil Type Transformer

In the realm of efficient and reliable power distribution, the Automatic Oil Type Transformer stands as a cornerstone technology. Engineered for superior performance and operational stability, this advanced transformer seamlessly integrates automation with robust oil-immersed cooling. Its core design prioritizes energy conservation, making it an exemplary Low Loss Transformer. By significantly reducing no-load and load losses, it delivers substantial long-term cost savings and supports sustainable energy initiatives. The unit's fully automated control system, a hallmark of a modern Automatic Transformer, enables remote monitoring, real-time diagnostics, and self-regulating tap changing. This ensures optimal voltage regulation under fluctuating load conditions without manual intervention. Specifically, as a Low Loss Oil Type Transformer, it combines the excellent dielectric and cooling properties of high-grade insulating oil with advanced core and winding materials like grain-oriented silicon steel. This synergy minimizes eddy current and hysteresis losses, maximizes efficiency, and extends the equipment's service life, making it an ideal choice for utility substations, industrial complexes, and large commercial facilities.


The Automatic Oil Type Transformer is meticulously designed with precision engineering and high-quality materials to meet the most demanding operational standards. Its construction ensures durability, safety, and consistent performance in diverse environmental conditions. The following section details the key technical parameters and specifications that define this product's capabilities.

Key Features & Advantages

Technical Specifications

Parameter Specification / Range Standard / Note
Rated Capacity (kVA) 500 - 50,000 Custom capacities available
Primary Voltage (kV) 11, 22, 33, 66, 110, 132, 220 As per IEEE / IEC standards
Secondary Voltage (kV) 0.415, 6.6, 11, 33 Other voltages on request
Frequency (Hz) 50 / 60 Designed for both
No-Load Loss (W) As low as 0.15% of rated power Meets DOE & CEA efficiency norms
Load Loss at 75°C (W) As low as 0.40% of rated power Optimized for maximum efficiency
Impulse Level (BIL) - HV (kV) 75 - 1050 Based on voltage class
Insulation Class Class A High-temperature rated
Cooling Type ONAN / ONAF Oil Natural Air Natural / Forced
Tap Changer ±8 x 1.25% or ±10 x 1.0% On-load type, motor-driven
Sound Level (dB(A)) < 65 (at 1 meter) NEMA ST-20 compliant
Oil Type High-quality Mineral Oil or BIOTEMP® Environmentally friendly options
Operating Temperature -30°C to +45°C Ambient temperature range

Construction & Materials

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