The S13 Series Oil-Immersed Distribution Transformer represents the next generation of energy-efficient power equipment. Designed for reliable step-down voltage distribution in utility networks, industrial plants, mining operations, and commercial facilities, the S13 model features advanced core manufacturing technology to significantly reduce no-load losses and operational costs.

Available across voltage ratings from 6kV up to 69kV, our S13 transformers strictly comply with IEC standard, and international standards, offering exceptional short-circuit resistance, low noise levels, and long service life under tough environment conditions.

High Efficiency & Energy Saving: The S13 series reduces no-load loss by up to 30% and no-load current by up to 70% compared to standard S11 series, saving substantial electricity cost.

Superior Thermal Performance: High-grade mineral transformer oil ensures rapid heat dissipation and robust insulation strength under continuous full-load operation.

Corrosion-Resistant & Fully Sealed Tank: Corrugated radiator tank design accommodates oil expansion while preventing external moisture and oxygen degradation.

High Short-Circuit Strength: Precision-wound copper/aluminum coils with upgraded structural clamping provide superior mechanical endurance during grid faults.

Multi-Voltage Adaptability: Flexible primary voltage options ranging from medium voltage (6kV, 10kV, 11kV, 15kV, 20kV, 22kV, 25kV) to high voltage (30kV, 35kV, 69kV).

Our S13 oil-immersed transformers are widely deployed in diverse electrical infrastructure projects worldwide:

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• Power distribution substations & public utility grids

• Industrial manufacturing facilities & steel mills

• Renewable energy integration (Solar PV plants & Wind farms)

• Commercial real estate, infrastructure, and mining enterprises

• Factory Testing: 100% routine tests before dispatch, including impulse voltage test, temperature rise test, power frequency withstand voltage test, and oil dielectric strength test.

• Tailored Solutions: On-load tap changers (OLTC), off-circuit tap changers (OCTC), special bushings, and customized enclosure ratings available upon request.

Q1: What is the difference between S11 and S13 oil-immersed transformers?

A: The S13 series uses advanced core laminated materials and optimized winding design, resulting in significantly lower no-load loss (approx. 20%-30% lower than S11) and lower operating noise.

Q2: Can you customize the primary voltage according to our local grid standards (e.g., 11kV, 33kV, 69kV)?

A: Yes, we provide full custom design according to your local grid requirement, dual-voltage options, and special vector group configurations.

Q3: What is the typical lead time for custom transformer orders?

A: Standard models take 10 days. Customized or high-capacity units (e.g., 35kV/69kV) usually require 15-20 days for complete manufacturing and factory testing.