Oil Immersed Transformer: kVA & kV Power Transformer Specification

High Voltage Efficiency

The insulating oil serves as the dielectric medium, allowing efficient heat removal and maintaining electrical insulation for safe operation under harsh conditions.

Exceptional Durability

With proper maintenance and regular oil quality tests, oil-immersed transformers can survive decades of operation, making them ideal for industries, power generation, and renewable energy installations.

Superior Cooling Performance

Heat is eliminated by the cooling effect of isolating oil, ensuring the transformer maintains consistent operation within acceptable temperature ranges throughout its service life.

Robust Design

Capable of handling mechanical stress and thermal loading while maintaining stability over extended periods of operation.

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⚡ KVA Rating

🔌 KV Rating

1. Regular Inspections

Conduct thorough inspections for unusual signs of wear, overheating, or contamination in all accessible components including insulating oil, cooling system, and electrical connections. Maintain an attendant log to record all observations for early warning of potential issues.

2. Oil Quality Management

Perform normal oil sampling and analysis to monitor dielectric strength, moisture levels, and the presence of dissolved gases. If impurities are found, proceed with purification or replacement to ensure optimum insulation and cooling performance.

3. Temperature & Load Management

Ensure the transformer operates within designated load limits to avoid overheating and structural damage. Monitor coolant flow and system temperatures for early detection of potential inefficiency. Always follow the manufacturer’s instructions for optimal performance.

⚡ Power Rating

Select a transformer with a rated capacity of kilovolt-amperes (kVA) matching your desired power load. The transformer should never be pushed beyond its operational limits to ensure optimal performance without overheating risks.

🔌 Voltage Requirements

Ensure input and output voltage ratings match your electrical network and equipment specifications. Proper voltage matching prevents compatibility issues and safeguards both equipment and personnel.

🌍 Environmental Conditions

Consider ambient conditions including operating temperature, humidity, and exposure to contaminants. These factors affect cooling efficiency and lifespan. Choose installations with good insulation and robust cooling systems for challenging environments.

A range of power ratings exists for different phases of oil-immersed transformers. Small single-phase units range from 75 KVA, while the high-voltage side ranges across available MVAs for substation applications. These transformer arrangements cater to various electrical requirements and are provided among a selection of primary and low voltage classes in compliance with IEC standards.

In standard specifications, the core is made from high-grade silicon steel or cold-rolled silicon steel with low-loss magnetic properties. The high-voltage and low-voltage windings use multi-layer and cylindrical configurations or other distributed transformer winding optimizations to ensure excellent electromagnetic performance and short circuit resistance.

Oil-immersed transformer insulation systems include a robust structure of oil-filled insulated components, capacitor-type bushing assemblies, and pressboard air barriers. Stringent dielectric strength is retained by full-tank sealing. Products compliant with IEC and UL/CSA offer great insulation performance, reliable high short circuit resistance, and trustworthy behavior in no-load situations.

Yes, the product line offers both single-phase and three-phase oil-immersed transformer specifications. These include high-voltage pole-mounted single-phase units for distribution and three-phase oil-immersed transformers for full voltage substations with HV and LV configurations designed to meet various client needs and match production capabilities.

Steel pole-mounted designs feature detachable fastener interfaces for easy installation. Substation designs consist of fully sealed tanks, sturdy fasteners, and mechanical structures sized for production capacity and transport. All designs follow customer specifications as well as international standards.

For low-noise core loss, specifications generally call for cores of high-grade cold-rolled silicon steel or low-loss silicon steel. Windings are made of either copper or aluminum depending on design requirements. The insulating oil must have high levels of electrical, thermal, and environmental stability. All components must conform to UL, CSA, and IEC standards as necessary.

Oil-filled transformer specifications detail short-circuit resistance and thermal ratings explicitly. Windings are sized to withstand short-circuit forces, with concrete insulation structures designed for thermal conduction. Acceptance tests cover short-circuit and temperature rise tests to ascertain that transformers are properly rated and classified for both normal operating and fault conditions.