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VFI three-phase pad-mounted transformers

Eaton’s Cooper Power series three-phase Vacuum Fault Interrupter (VFI) transformer performs double duty in a single, compact and cost-effective package. Combining a conventional pad-mounted transformer with the proven VFI, the unit provides both voltage transformation and transformer/loop overcurrent protection in a design that simplifies installation, reduces costs and requires less real estate.

VFI three-phase pad-mounted transformer
Primary voltage
Delta or Wye connected 2400-34,500 V
Rating
45-12,000 kVA
Interrupt rating
12.5 kA at 25/35 kV, up to 16 kA at 15 kV (up to 65 kA w/PRCL fusing)

Core features

  • Resettable fault protection eliminates the need for fuses, reducing outage time and providing better performance
  • Reduces installation, operation and maintenance costs compared to transformer plus separate switchgear
  • Eliminates single-phasing of three-phase loads and associated ferroresonance problems
  • Ideal for applications where conventional equipment doesn’t provide adequate protection or coordination, where aesthetics is important or where space is at a premium
  • Occupies as little as half the space of a conventional set-up while simplifying installation
  • Sealed visible disconnect window allows operators to verify contact position
  • Protects transformer and provides proper coordination with upstream protective device
  • Single-phase initiated gang-trip for single-phase faults, limiting outage scope in large residential areas
  • Envirotemp FR3 fire-resistant dielectric fluid (optional)

A unique design that addresses multiple challenges

Eaton's Cooper Power series VFI transformer is ideal for applications where conventional equipment doesn’t provide adequate protection or coordination, where aesthetics is important or where space is at a premium.

Superior protection for multiple applications

Combining a conventional transformer and switchgear in a single, space-saving cabinet, Eaton's compact VFI transformer provides superior protection, coordination and flexibility for indoor or outdoor residential, commercial or industrial applications.

Get unparalleled reliability at a significantly lower cost

Eaton’s combined transformer/switchgear package reduces overall costs and lifecycle expenses, including installation, operation and maintenance.