The S11-M-500/10-0.4 is a fully sealed, 500kVA 3-phase oil-immersed distribution transformer engineered for medium to large-scale power loads. Designed for industrial parks, shopping centers, and district grids, it features 100% copper windings and a corrugated tank. This low-loss, long-life transformer operates seamlessly at 10kV primary and 400V secondary voltages under the ONAN cooling system, in full compliance with IEC 60076 international standards.
| Quantity: | |
|---|---|
The S11-M-500/10-0.4 distribution transformer is optimized for high-efficiency voltage reduction in medium-voltage grids. Utilizing a fully sealed structural design, the transformer oil remains isolated from the atmosphere, completely preventing moisture absorption and oil aging. This significantly reduces maintenance costs while extending the operational lifespan of the unit. Equipped with a corrugated cooling tank and CRGO core material, it provides stable power distribution for severe industrial and commercial environments.
100% Copper Winding: Ensures maximum electrical conductivity, minimal load loss, and superior short-circuit resistance.
Fully Sealed Design: Maintenance-free structure prevents air and moisture from degrading the insulation oil.
Low Loss & Low Noise: Engineered with high-quality CRGO steel cores to keep no-load current below 0.5% and minimize energy dissipation.
Corrugated Expansion Tank: The corrugated walls dynamically adjust to oil volume changes caused by temperature fluctuations, eliminating the need for an oil conservator.
Standard Compliance: Fully designed, manufactured, and tested in accordance with international IEC 60076 specifications.
Rated Capacity: 500 kVA
Phase: 3-Phase
Primary Voltage (Input): 10 kV
Secondary Voltage (Output): 400 V / 0.4 kV
Frequency: 50 Hz / 60 Hz
Vector Group Connection: Dyn11 / Yyn0
Cooling Method: ONAN (Oil Natural Air Natural)
No-Load Loss: Less than or equal to 680 W
Load Loss: Less than or equal to 4880 W
Short-Circuit Impedance: 4%
No-Load Current: Less than or equal to 0.5%
Core Material: Cold-Rolled Grain-Oriented (CRGO) Silicon Steel
Tank Type: Sealed Corrugated Tank
Mounting Type: Ground Mounting (suitable for weights greater than or equal to 315kVA)
This 500kVA distribution transformer is widely deployed across infrastructure projects requiring continuous, high-reliability power step-down capabilities:
Industrial Parks & Manufacturing Plants
Commercial Shopping Centers & Office Districts
Municipal District Power Distribution
Public Healthcare Facilities & Hospitals
Educational Institutions & University Campuses
To meet site-specific engineering requirements, we offer factory-installed accessories:
Precision Oil Level Gauge
Integrated Dial Thermometer
Protective Metal Enclosure
Heavy-Duty Castors / Wheels
High-Voltage and Low-Voltage Bushings
Feature / Vector Group | Dyn11 Connection | Yyn0 Connection |
Neutral Current | Handles 100% unbalanced neutral current | Limited to 25% neutral current capacity |
Harmonic Suppression | Delta primary eliminates 3rd harmonics | Allows 3rd harmonics to pass through |
Grid Suitability | Ideal for TN-C-S / unbalanced commercial loads | Best for balanced, stable industrial loads |
JSON
Foundation Preparation: Cast a reinforced concrete foundation capable of supporting the full oil-filled weight of the 500kVA unit.
Positioning & Levelling: Place the corrugated tank transformer via crane on the foundation, ensuring accurate leveling and wheel alignment.
Grounding Connection: Securely bond the transformer ground terminal and the tank frame to the main substation grounding grid.
Bushing & Cable Termination: Connect the 10kV primary and 400V secondary cables to their respective bushings using rated torque settings.
Pre-Commissioning Testing: Conduct insulation resistance, voltage ratio, and oil level verification prior to energizing the circuit.
J
