☉ Manufacturing since 2004 · Rajkot, Gujarat, India ✉ [email protected] ☎ +91 958 627 7766
Pre-Engineered Package Substation

Compact Sub Station (CSS)

Factory-assembled, type-tested outdoor secondary substations up to 33 kV class for utilities, industrial complexes, and commercial infrastructure worldwide.

Compact Secondary Substation Kiosk with VCB, RMU and Step-Down Transformer
Product Overview

Your Trusted Compact Substation Manufacturer & Global Supplier

Synergy Transformers Pvt. Ltd. engineers and manufactures fully compartmentalized Compact Secondary Substations (CSS) engineered to international standards (IEC 62271-202 / IS 14786). A CSS is a pre-commissioned plug-and-play power distribution solution housed in a weather-tight, vandal-proof enclosure, integrating Medium Voltage Switchgear (VCB/RMU/LBS), a Distribution Transformer (Cast Resin Dry-Type or Hermetically Sealed Oil-Immersed), and a Low Voltage Switchboard.

Designed for rapid deployment near load centers, our compact substations eliminate extensive civil works, minimize high-voltage cable runs, reduce transmission losses, and deliver maximum operational safety for global B2B procurement teams, utility operators, and EPC contractors.

  • Modular 3-Compartment Design (MV Switchgear, Transformer, LV Switchboard)
  • Compliance with IEC 62271-202 & IEC 60076 standards
  • IP54 / IP45 Protection Class with anti-corrosive polyurethane polyurethane paint
  • Equipped with temperature sensors, numerical relays, & automatic trip logic
  • Supports rooftop, plinth, or subterranean outdoor/indoor installations
Engineering Advantages

Why Global EPCs & Utilities Choose Synergy CSS

Proven structural integrity, climate-resilient insulation, and internal arc protection built into every unit shipped from our Rajkot manufacturing hub.

Pre-Engineered Plug & Play

Factory-wired, assembled, and 100% routine-tested prior to dispatch. Reduces field erection time by up to 80% compared to conventional masonry substations, enabling swift project commissioning.

Space & Footprint Optimization

Designed for dense urban environments, commercial centers, and solar parks where land availability is restricted. Up to 70% footprint reduction compared to open-yard substations.

Corrosion & Weather Resilience

Constructed with heavy-gauge galvanized MS or aluminum housing coated with zinc-rich primer and polyurethane/epoxy topcoat (C4/C5 marine grade) for long service life under extreme ambient conditions.

Maximum Personnel Safety

Internal arc-tested compartments with mechanical safety interlocks, insulated busbars, pad-lockable handles, and segregated low-voltage control circuits prevent accidental contact.

Low Maintenance & High Efficiency

Choice of low-loss foil-wound transformers (Level 1/Level 2 losses) paired with vacuum circuit breakers (VCB) or gas-insulated SF6 Ring Main Units (RMU) ensures minimal power interruption.

Custom Engineering Flexibility

Tailored options for smart metering CT/PTs, Automatic Power Factor Correction (APFC), SCADA automation interfaces, and specialized RTD channel temperature monitoring.

Technical Specifications

CSS Technical Parameter Matrix

Standard engineering parameters. Ratings, switchgear options, and enclosure specs can be customized according to consultant tender details.

Technical envelope for Synergy Compact Secondary Substations (CSS) up to 33 kV.
Parameter Technical Specification
Applicable Standard IEC 62271-202, IS 14786, IEC 60076, IS 2026
Transformer Type Cast Resin Dry Type (CRT / VPI) OR Hermetically Sealed / Conservator Oil-Immersed
Power Capacity Range 250 kVA to 3150 kVA
Voltage Class (HV / LV) 11 kV / 22 kV / 33 kV Primary – 415V / 433V / Custom Secondary
Tapping Range Off-Circuit Tap Changer (OCTC) ±5% in 2.5% steps (OLTC optional)
High Voltage (HV) Protection Vacuum Circuit Breaker (VCB) / SF6 Gas-Insulated RMU / Load Break Switch (LBS) with Shunt Trip & IDMT Relays
Low Voltage (LV) Protection Air Circuit Breaker (ACB) / Moulded Case Circuit Breakers (MCCB) / LBS with Busbar Chamber
Enclosure Protection Class IP54 / IP44 / IP45 outdoor kiosk with natural/forced louvered ventilation
Enclosure Surface Treatment Zinc-rich primer with epoxy/polyurethane dual-coat finish (5+ years anti-rust warranty)
Monitoring & Safety Sensors 8-Channel RTD Scanner with Fan Control, Alarm, Trip contacts, WTI, OTI, & Buchholz logic
Product Range

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Ready to Spec or Source Compact Substations for Your Project?

Send your single-line diagram (SLD), rating requirement, or tender specifications directly to our senior engineering desk. We provide factory quotation packages, technical drawings, and type-test dossiers.

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