Description

The TRT®-LHD®-MODULO range enables the creation of large bunded areas and volumes for the containment of dielectric oils from your transformers.

Modular fire-protection bunds for large power transformers

Thanks to an innovative and robust assembly system, the TRT®-LHD®-MODULO range consists of 2, 3, 4, 5, or “N” interconnected modules. Each module includes a TRT®-MODULO bund equipped with a fire-resistant grating cover EXTICOV®-LHD®, connected to the others via the SNG-Flow™ communicating vessel system, allowing fluid passage between bunds.

The TRT®-LHD®-MODULO range is recommended for large transformers when the bund’s width exceeds the European transport limit (2500 mm). This modular system allows the creation of extra-large bunds to accommodate high-voltage power transformers weighing over 300 tonnes and containing more than 100 tonnes of dielectric oil.

A solution for challenging civil engineering constraints

The TRT®-LHD®-MODULO system is also ideal for installations where on-site civil engineering is complex, outdated, or where excavating a concrete bund is not possible. Instead of a traditional concrete pit, the TRT®-LHD®-MODULO provides an above-ground bund installed on a reinforced, flat, and smooth concrete slab. This reduces civil engineering costs and significantly shortens the compliance timeline for electrical substations.

A fully compliant 4-in-1 retention system, installed in hours

With just a simple concrete slab, you can create a fully compliant bund system meeting all regulatory requirements:

✅ Containment: Retention of at least 100% of the dielectric oil volume, sized by our engineering team.
✅ Fire suppression: Hydrocarbon pool fire protection using the EXTICOV®-LHD® single-slope fire damper cover.
✅ Filtration: SPI® hydrocarbon-filtering drainage with PETRO PIT 416 or PETRO PIPE PI616M2.
✅ Personnel safety:

• Anti-slip electro-forged grating (30×30) or fully welded CUBE grating, supporting 500 daN/m² (2 operators + refill drum).
• SANERFALL™ guardrails, MODESCA™ staircases, and PLATABUND™ access platforms for secure operation.

Key features of the TRT®-LHD®-MODULO fire-protection bunds

• S235 steel tank, 3, 4, or 5 mm thick, with hot-dip galvanisation certificate ISO EN1461-2022.
• Inter-bund covers with fastening clamps, bolted bund connections, and SNG-Flow™ sealed fluid passages with gaskets, washers, and installation keys.
• Fully sealed double welding on all retention areas, with individual quality inspections before leaving the factory.
• Fire suppression system (EXTICOV®-LHD®) with independently tested fire damper panels.
• Equipment support structures designed for easy installation:
  • Fixed beams along the length or width of the bund.
  • Adjustable beams, rolling rails, sliding beams, or multiple “elephant foot” supports with load-distribution plates, depending on the transformer’s positioning method (craning, sliding, or rolling).

Additional functionalities

• Two sealed wall penetrations for 1.5″ or 2″ quarter-turn valves, allowing:
  1️⃣ Bund drainage
  2️⃣ Connection of an SPI rainwater filtration kit
• Standard configuration includes two sealed stainless steel plugs for unused penetrations.
• Integrated safety siphon at the bottom of the bund, ensuring excess rainwater drainage without oil discharge, even in the event of heavy rainfall or clogged filtration.
• Lifting hooks for easy unloading and on-site installation.

Built for long-term performance

The TRT®-LHD®-MODULO bunds are designed to match the lifespan of the power transformer or industrial equipment they protect, both for indoor and outdoor installations.

Additional information