52kV Electrical Insulated Oil Immersed Distribution Transformer for Stable and

Product Specification

Meta Title:
S11-M-800/15 Oil Immersed Power Transformer | 800KVA 3-Phase 50Hz | Dyn11

Meta Description:
China manufacturer of Oil Immersed Transformer S11-M-800/15. 800KVA rated capacity, 52kV insulation, 5.43% impedance. GB certified for distribution grids and industrial substations. Get the technical datasheet.

H1 Title:
S11-M-800/15 Oil Immersed Power Transformer – 800KVA, 50Hz, 3-Phase

Overview:
This S11-M-800/15 Oil Immersed Transformer is a 3-phase, 50Hz power distribution unit engineered for medium-voltage grid applications. Manufactured in China under strict GB certification, this unit delivers a rated capacity of 800KVA with an electrical insulation strength of 52kV, ensuring safe step-down transformation for industrial parks, commercial complexes, and rural substation networks. Utilizing 45# high-grade transformer oil, the unit provides superior dielectric cooling and thermal dissipation, maintaining operational stability at ambient temperatures up to 75°C. The Dyn11 connection group offers flexible neutral grounding, making it compatible with both delta and wye distribution systems.

Technical Parameters:
Product Model: S11-M-800/15
Rated Capacity: 800 KVA
Phase Number: 3-Phase
Rated Frequency: 50 Hz
Connection Group: Dyn11
Electrical Insulation Strength: 52 kV
Short-Circuit Impedance (at 75°C): 5.43%
Load Loss (at 75°C): 8400 W
No-Load Loss: 1242 W
No-Load Current: 0.58%
Insulating Oil Type: 45# Transformer Oil
Certification: GB Standards

Applications:
This 800KVA oil-filled transformer is engineered for mission-critical power distribution systems. It is specifically suited for:

• Industrial Substations: Provides reliable power stepping for manufacturing plants and heavy machinery with high inrush currents.

• Residential and Commercial Complexes: Ensures stable voltage regulation for HVAC systems, lighting, and elevator drives in high-rise buildings.

• Renewable Energy Integration: Acts as an interface transformer for solar farms and wind turbine step-up collection systems when paired with appropriate primary voltages.

• Rural Electrification: Offers durable performance in remote areas with fluctuating grid loads, thanks to its robust 45# oil cooling system that withstands heavy seasonal overloads.

Key Features:

• Enhanced Dielectric Strength: Rated at 52kV insulation strength to withstand voltage spikes and lightning surges, ensuring grid safety.

• Efficient Thermal Management: The 45# oil circulation system dissipates heat effectively, limiting the load loss to 8400W at rated conditions, which translates to lower operational electricity costs over the transformer's lifecycle.

• Durable Corrosion Protection: The tank body is treated with anti-rust primer and weather-resistant topcoat, suitable for both indoor substation rooms and outdoor pole-mounted or pad-mounted installations.

• Low No-Load Losses: With a no-load loss of only 1242W and a no-load current of 0.58%, this S11 series transformer meets modern energy-saving mandates for utility providers.

Packaging and Logistics:
Packaging Method: Secured on heavy-duty Wooden Pallets with shock-absorbing foam and moisture-barrier wrapping to prevent corrosion during maritime or overland freight.
Origin: CHINA.
Compliance: Designed in accordance with GB standards, ensuring seamless integration into existing Chinese and international grid infrastructures.
Customization: OEM options available for bushing types, tapping ranges, and paint colors based on project volume requirements.