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Prefabricated Unit Substation

The CEEG compact substation integrates high-voltage switchgear, distribution transformer, and low-voltage switchgear, suitable for both indoor and outdoor use. The packaged substation features strong integration, a small footprint, low investment, and easy installation and maintenance. Rated voltages: 6KV, 10KV, 35KV. Enclosure protection ratings: IP54, IP33, with custom solutions available for special requirements.
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Product Features

  • Excellent Production Performance: The frame is coated with a special paint layer. The internal design includes safeguards to prevent:

    incorrect operation of circuit breakers.

    switching of isolators under load.

    connecting (closing) grounding wires (grounding switches) while energized.

    closing circuit breakers with grounding wires (grounding switches) in place.

    accidental entry into live compartments.


  • Utilizes Schneider BIOSCO technology with a modular structure, making it easy to install and operate.


  • Welded from structural steel, providing excellent mechanical strength and a well-treated surface for strong weather resistance.


  • Advanced Environmental Control: The transformer and low-voltage rooms are equipped with automatic temperature control devices, ensuring temperature regulation and efficient ventilation.


  • The top insulation layer prevents condensation caused by rapid temperature changes, and additional insulation layers can be added around the enclosure.


  • Smart Operations: Features intelligent operation and maintenance, with smart data collection and analysis on HV & LV switchgear and the transformer.


  • Design and Customization: Attractive design, customizable, and offers a wide range of choices. Internal structure available in "H" and "T" shapes, with options for both corridor and non-corridor layouts.



Enclosure Structure:

High Voltage Chamber:

The primary high voltage chamber houses a high-voltage ring main unit. High-voltage switches support sulfur hexafluoride load switches and vacuum circuit breakers. The high-voltage cabinet protects the transformer from short circuits, overloads, and more.


Transformer Chamber:

The three-phase transformer chamber accommodates dry-type or liquid (oil) immersed transformers. The enclosure is equipped with a sophisticated ventilation system with adjustable temperature settings. Transformers are equipped with live space barriers to prevent accidental contact during observation.


Low Voltage Chamber:

The secondary low voltage chamber comes in two assembly forms: with or without a corridor. It can house metering cabinets, main incoming cabinets, outgoing cabinets, capacitor cabinets, and interlocking cabinets (for dual transformers), providing comprehensive functionality for low-voltage switchgear. Capacitive reactive power compensation generally ranges from 15% to 30% of the transformer capacity.


internal structure



Operating Environment

Ambient Temperature: -25°C to 40°C

Altitude: Not exceeding 1000 meters

Relative Humidity: Not exceeding 90% at 25°C, with short-term peaks up to 100%

Installation Conditions: Suitable for locations without fire, explosion hazards, chemical corrosion, or severe vibrations


unit substation 1


Prefabricated Unit Substation (4)


Prefabricated Unit Substation (2)

unit substation 3

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