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Sealed, Safe, and Smart: The Loop‑Feed Padmount Transformer

Sealed, Safe, and Smart: The Loop‑Feed Padmount Transformer

Introduction
A loop‑feed pad‑mount transformer is built for underground power networks where reliability is critical. Unlike a radial feed system, it features two primary cable connections that form a continuous loop. This design allows power to be redirected around a fault, keeping most of the grid running.

How It Works
Power comes in through one set of bushings, passes through the transformer, and continues to the next unit on the loop. When a fault occurs, the defective segment can be isolated by opening the loop at that point – the rest of the network stays energized without interruption.

Key Benefits

  • High reliability – Only a small area is affected by an outage.
  • Quick fault recovery – Isolate the problem without shutting down the entire line.
  • Safe and compact – Tamper‑resistant, ground‑level enclosure.
  • Simple scalability – Add more transformers without redesigning the system.
  • Low maintenance – Sealed compartments, no exposed live parts.

Typical Applications

  • Commercial complexes and office parks
  • Industrial facilities
  • Residential subdivisions with buried cables
  • Solar farms and wind power connections
  • Data centers and other critical infrastructure

Typical Specifications

ParameterRange
Power rating75 kVA – 5000 kVA
Primary voltage5 kV, 15 kV, 25 kV, 35 kV
Secondary voltage120/208V, 277/480V, etc.
Frequency50/60 Hz
Cooling methodONAN
Enclosure ratingNEMA 3R / IP54
Applicable standardsANSI/IEEE, IEC

Why Choose Our Products

  • 100% factory tested before delivery
  • Custom designs available on request
  • Short, reliable lead times
  • Worldwide shipping and a 2‑year warranty
  • UL certified

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