Factory-Assembled Package Substations up to 20 MVA, 33 kV
Urja Techniques (India) Pvt. Ltd. is a premier manufacturer and exporter of Unitized Compact Substations (CSS), also recognized worldwide as Package Substations (PSS) or Prefabricated Kiosk Substations. Engineered to replace expansive conventional brick-and-mortar substations, our CSS solutions combine Medium Voltage (HT) Switchgear, a highly efficient Power/Distribution Transformer, and a Low Voltage (LT) distribution board within a singular, tamper-proof, and weather-resistant enclosure.
Manufactured under strict ISO 9001, 14001, and 45001 certified quality control systems at our modern plant in MIDC Rabale, Navi Mumbai, each unit arrives at the site fully wired, tested, and ready for immediate grid energization.
- Compact footprint saves up to 70% land space compared to open-yard substations.
- Pre-assembled, wired, and factory-tested to eliminate on-site commissioning delays.
- Segregated internal compartments with internal arc classification for utmost human safety.
- Completely compliant with IEC 62271-202, IS 14728, and ANSI standards.
Three-in-One Integrated Substation Architecture
Every compact substation engineered by URJA features three distinct, metal-segregated compartments designed to maximize equipment life and ensure safe maintenance.
1. Medium Voltage (HT) Room
Houses high-voltage incoming switchgear, configured with either SF6-insulated Ring Main Units (RMU) or compact Vacuum Circuit Breakers (VCB).
- Load Break Switches (LBS) / VCB
- Built-in earth switches & interlocks
- Surge arresters & voltage indicators
- Self-powered numerical relays
2. Transformer Compartment
Engineered to house either an oil-immersed distribution transformer (ONAN) or a Cast Resin Dry Type (CRT) / VPI transformer.
- Ratings up to 20 MVA, 33 kV class
- Integrated oil collection sump basin
- Natural ventilation louvers (IP23 / IP33)
- Temperature monitoring & trip sensors
3. Low Voltage (LT) Panel
Custom-built LV switchboard facilitating power distribution, protection, metering, and power quality optimization.
- Air Circuit Breakers (ACB) / MCCBs
- Automatic Power Factor Correction (APFC)
- Multifunction digital energy meters
- Busbars rated with high short-circuit limits
Technical Specifications & Design Ratings
Customizable options tailored to project-specific environmental, electrical, and structural prerequisites.
| Parameter | Standard / Range Specification |
|---|---|
| Power Capacity | Up to 20 MVA (custom design ratings available) |
| Primary (HT) Voltage Class | 3.3 kV, 6.6 kV, 11 kV, 22 kV, 33 kV |
| Secondary (LT) Voltage Class | 415 V, 433 V, 690 V (or project-specified LV) |
| Transformer Options | Mineral Oil-immersed (ONAN / ONAF) or Cast Resin Dry Type (AN / AF) |
| HV Switchgear Types | Compact RMU (SF6 / Solid Insulated) or Vacuum Circuit Breaker (VCB) |
| LV Switchgear Types | ACB, MCCB feeders, automated APFC panels, EMS energy monitoring |
| Enclosure Material | Galvanized Steel / Pre-galvanized sheet / Marine-grade Aluminium / Stainless Steel |
| Enclosure Protection Class | IP54 for MV/LV electrical compartments, IP23/IP33 for transformer bay |
| Standard Compliance | IEC 62271-202, IS 14728, ANSI/IEEE C37.74 |
| Finishing & Coating | Electrostatic polyurethane powder coating (70–120 microns) for extreme UV & corrosion resistance |
Featured Package Substation Projects
Explore a selection of our factory-built secondary unit substations engineered for global utility and industrial clients.
Versatile Applications Across Industries
Delivering dependable, secure, and aesthetically unobtrusive power distribution across harsh industrial zones and modern smart cities.
Smart Cities & Metros
Underground metro stations, smart city infrastructure, street lighting distribution, and high-density urban residential hubs.
Renewable Energy
Solar farm step-up units, wind farm collector substations, and energy storage integration plants.
Oil, Gas & Petrochemicals
Refineries, terminal stations, offshore onshore drill sites demanding robust explosion-proof and corrosion-proof housings.
Heavy Manufacturing
Steel mills, chemical processing plants, automobile complexes, pharmaceutical zones, and textile parks.
Commercial Real Estate
Shopping malls, corporate IT parks, airports, hospitals, multi-storey commercial towers, and data centers.
Mining & Remote Sites
Containerized skid-mounted mobile substations for mining quarries and temporary project site electrification.
Infrastructure & Ports
Seaports, container terminals, railway traction networks, and highway toll infrastructure hubs.
Global Export Markets
Plug-and-play substations tailored for rapid infrastructure in GCC (Saudi Arabia, UAE, Qatar), Africa, and Southeast Asia.