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Compact
Substations

Compact Substation

What is Compact Substation?

A compact substation (CSS) is a pre-fabricated, enclosed unit that integrates various electrical components, such as transformers, switchgear, and control equipment, into a single compact structure. It is used for transforming and distributing electrical power, typically in applications where space is limited or a modular, ready-to-use solution is required.

As the word suggest, solutions for the present need of the world – compact – ready to use – space saving solutions. Danish Compact Substations are mainly used in Secondary Distribution Systems.

Applications of Compact Substations

Urban Areas
Urban Areas

Ideal for cities where space is a constraint.

Industrial Plants
Industrial Plants

Supplies power to factories, warehouses, and industrial zones.

Renewable Energy Projects
Renewable Energy Projects

Used in solar or wind farms to integrate power into the grid.

Infrastructure Projects
Infrastructure Projects

Powers facilities such as airports, metro stations, and data centers.

Compact Substations of Danish

Standards: IEC 62271-202 (IEC 61330) / IS 14786

Danish Compact Substation

Salient Features:

  • Pre-fabricated, Factory-built, tested & ready to use
  • Flexible / Customizable to suit client / site needs
  • Also available as VERTICAL TOWER TYPE Compact Substation with Transformer Compartment on top of MV / LV compartment
  • Medium Voltage Compartment: Equipped with SF6 insulated Ring Main Unit (RMU) upto 36 kV or air insulated switchgear with Vacuum Circuit Breaker (VCB), or Load Break Switch / Switch Fuse Unit
  • Low Voltage Compartment: Fully customizable as per client needs with options to choose from Air Circuit Breaker (ACB) / Moulded Case Circuit Breaker (MCCB) / Automatic Power Factor Correction (APFC) Panel / Fuse / Metering etc.

Technical Parameters

Standards Compact Substation: IEC 62271-202 (IEC 61330) / IS 14786
MV Switchgear: IEC 60265 / 60694
Transformer: IEC 60076 / IS 2026 / IS 1180
LV Switchgear: IEC 60439
Temperature Class K10
Degree of Protection IP 2X / 5X
Rated Primary Voltage 3.3 / 11 / 15 / 20 / 24 / 33 kV
Rated Power Upto 3500 kVA for Oil Type Trafo;
Upto 4000 kVA for Dry Type Cast Resin Trafo
Rated Secondary Voltage 0.400 / 0.415 / 0.433 / 0.630 / 0.690 / 11 kV

Features of Compact Substations

Space-Saving Design

Combines multiple functions in a compact footprint.

Prefabrication

Manufactured and tested in factories, ensuring quality and quick installation.

Plug-and-Play Installation

Requires minimal on-site assembly, reducing setup time.

Customizable

Designed to meet specific voltage levels, capacities, and environmental conditions.

Safety

Equipped with features to ensure operator and public safety, such as interlocks and fire-resistant enclosures.

Key Components

Transformer Usually an oil-immersed or dry-type transformer for stepping down or stepping up voltage levels.
High-Voltage Switchgear Handles the incoming high-voltage supply and provides protection through circuit breakers or load break switches.
Low-Voltage Distribution Panel Distributes the stepped-down voltage to various feeders and loads.
Protection and Control Equipment Includes relays, meters, and controllers for monitoring and protecting the system.
Enclosure A robust, weatherproof, and often tamper-proof housing that ensures safety and durability.

Advantages of Compact Substations

Reduced Footprint

Takes up less space compared to traditional substations.

Ease of Maintenance

Centralized access to all components simplifies inspections and repairs.

Cost-Effective

Prefabrication and quick installation lower overall project costs.

Reliability

Designed to operate in harsh environments with minimal maintenance requirements.

Aesthetic Appeal

Often designed to blend into the surrounding environment.