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S11-M-630/10-0.4 630kVA 10/0.4kV 3-Phase Fully Sealed Oil Immersed Distribution Transformer

The S11-M-630/10-0.4 is a fully sealed 630kVA 3-phase oil-immersed distribution transformer designed for heavy industrial and commercial applications. Engineered with copper windings and a corrugated tank, this unit operates with low noise and high efficiency. It strictly complies with IEC 60076 standards, providing reliable 10kV to 400V step-down performance for robust power grids.
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The 630kVA S11-M distribution transformer is optimized for heavy-duty power distribution in harsh environments. Utilizing a fully sealed structural design, the cooling oil is completely isolated from the atmosphere, eliminating moisture absorption and significantly extending the equipment's lifespan. Supported by a high-efficiency CRGO core and ONAN cooling system, this transformer delivers continuous, low-loss power stability for large-scale operations.

Key Features

  • Copper Winding Construction: Built with high-conductivity copper for superior load handling and operational longevity.

  • Fully Sealed Corrugated Tank: The corrugated design accommodates oil expansion and contraction dynamically, removing the need for a separate conservator tank and enabling a maintenance-free structure.

  • Optimized Core Material: Manufactured using Cold-Rolled Grain-Oriented (CRGO) silicon steel to ensure minimal no-load losses and high efficiency.

  • Low Noise & Low Loss Operation: Specifically engineered to reduce operational noise while keeping no-load current at or below 0.5%.

  • International Standard Compliance: Manufactured and tested in full compliance with IEC 60076 specifications.

Technical Parameters

Parameter

Specification

Rated Capacity

630 kVA

Primary Voltage (Input)

10 kV

Secondary Voltage (Output)

400 V / 0.4 kV

Frequency

50/60 Hz

Phase

3-Phase

Vector Group Connection

Dyn11 / Yyn0

Cooling Method

ONAN

No-Load Loss

≤ 810 W (S11)

Load Loss

≤ 5880 W (S11)

Impedance

4.5%

No-Load Current

≤ 0.5%

Winding Material

Copper

Core Material

CRGO

Tank Type

Corrugated, sealed

Industrial Applications

This heavy-duty 630kVA transformer is engineered to support major infrastructure and continuous power loads, including:

  • Large factories and manufacturing facilities

  • Main power distribution centers

  • Civil and municipal infrastructure projects

  • Mining operations and extraction sites

Optional Accessories (Factory Installed)

To meet specific project specifications, the following accessories are available for integration:

  • Precision oil level gauge

  • Dial thermometer

  • Protective safety enclosure

  • Heavy-duty casters for mobility

  • High and low voltage bushings

Detailed accessories of 630kVA oil immersed distribution transformer including HV bushings, radiator detail, off-load tap changer, and oil gauge

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