Download document () of 20
Clear selection
Download selection
Australia Select your location
Submit form in new Tab
We make what matters work*
Submit form in new Tab
Products
Services
Markets
Support
Company
MyEaton
Quick links

Switchgear

VFI Vacuum Fault Interrupter Switchgear

Eaton's Cooper Power series VFI vacuum fault interrupter switchgear provides an environmentally preferred, safer and more reliable approach to medium-voltage switching and protection. Additionally, it features dead-front construction and enhanced operating features for added safety, all completely immersed within a sealed, insulated medium.

Contact me about this solution
Resettable vacuum fault interrupter
Immediate service restoration
Deadfront construction
Optimal operator safety
Compact, low-profile
Unobtrusive, flood-resistant design

Core features

  • Envirotemp FR3 or E200 fluid, environmentally-preferred switchgear dielectrics is optional, as well as mineral oil or SF6 gas
  • Eliminates the risk of contaminating the insulating medium with its vacuum switching
  • Improves safety for utility personnel and the general public, with dead-front construction
  • Offers single or three-phase tripping and optional visible-break, as well as grounding switches for added safety
  • Provides a flexible solution for time-current curve coordination, with optional tri-phase electronic control
  • Edison Idea relays are optional to allow enhanced protection and communication functionality 

Improves safety

Deadfront construction provides a higher level of safety for operating personnel. The optional visible-break switch with viewing window verifies an open circuit without removing the cables. Large, easily viewed contacts show the open/close position of the visible-break switch.

Enhanced protection and communication functionality

Edison Idea and IdeaPLUS relays meet all applicable relay standards, including IEEE Std C37.90-2005 and IEEE Std 1547-2003 standards. iDP-210 relay provides multi-function protection elements for one source or tap. iTAP-265 relay provides overcurrent protection for two three-phase taps. iTAP-260 relay provides overcurrent protection for two three-phase taps with independent settings for each phase. Each phase can be independently tripped.

Eliminates increasing government regulation compliance costs

Fire-resistant E200 fluid and Envirotemp FR3 fluid are offered as insulation media options. E200 fluid is fire-resistant biodegradable, polyol ester-based, non-toxic low viscosity fluid with excellent dielectric, thermal and physical properties. The low viscosity characteristic allows it to be used in VFI switchgear down to -30°C. Its fire point is greater than 300°C (572°F), a requirement for less flammable fluids. Envirotemp FR3 fluid does not contain any petroleum, halogens or silicones. It quickly and thoroughly biodegrades in both soil and aquatic environments. The fluid tested non-toxic in aquatic toxicity tests.
Specifications

Ratings

    15 kV 15 kV 25 kV 35 kV
Maximum design voltage, kV 15.5 15.5 27.0 38.0
BIL, kV 95 95 125 150
1-minute withstand voltage (60 Hz), kV 35 35 60 70
Momentary current, 10 cycles (sym.), kA 12.5 16.0 12.5 12.5
1-second withstand current (sym.), kA 12.5 16.0 12.5 12.5
Vacuum fault interrupter Continuous current, (max.), A 600** 600** 600** 600
Interrupting current (sym./asym.), kA 12.5/20.0 16/25.8 12.5/20.0 12.5/20.0
Making current (sym.), kA 12.5 16.0 12.5 12.5
Cable charging interrupting current, A 10.0 10.0 25.0 40.0
Load-break switch Continuous current, (max), A 600 600 600 600
Load switching, A 600 600 600 600
Fault making (sym./asym.), kA 12.5/20.0 16/25.8 12.5/20.0 12.5/20
* Continuous and short-circuit currents may be limited by ratings of selected bushings
** 900 A and 1200 A continuous-current ratings are also available

Standard features

  • Liquid level or pressure gauge
  • Lift-up roof with retainers
  • Side recessed lifting provisions
  • Pentahead bolt with padlock provisions
  • 200A bushing wells or 600A bushings
  • Accessory parking stands
  • Drain plug
  • Tri-phase control
  • Single, double side, compact
  • Up to 6-way units

Optional accessories

  • Ground rod or flat buss
  • Kirk key interlock provision
  • Visible break with optional ground
  • Single-phase or three-phase trip
  • Operation counter
  • Fault indicator provision
  • Auxiliary switch
  • Microprocessor-based Idea relay
  • Motor actuator

Applicable standards

  • IEEE Std C37.74-2003: standard requirements for subsurface, vault and pad-mounted load-Interrupter switchgear and fused load-Interrupter switchgear for alternating current systems up to 38 kV
  • IEEE Std C37.60-2003: standard requirements for overhead, pad-mounted, dry vault and submersible automatic circuit reclosers and fault interrupters for alternating current systems up to 38 kV
  • IEEE Std C57.12.28-2005: standard for pad-mounted equipment – enclosure integrity
  • IEEE Std C57.12.29-2005: standard for pad-mounted equipment – enclosure integrity for coastal environments –applicable when stainless steel construction is specified
  • IEEE Std 386-2006: standard for separable insulated connector systems for power distribution systems above 600 V
  • IEEE Std C37.90-2005: standard for relays and relay systems associated with electric power apparatus
  • IEEE Std C37.90.2-2004: standard for withstand capability of relay systems to radiated electromagnetic interference from transceivers

UL listing and labelling options

  • 15 kV and 25 kV voltage ratings
  • 600 A continuous current rating
  • 12.5 kA symmetrical interrupting rating
  • Fluid Dielectrics (mineral oil, E200 and Envirotemp FR3 fluids)
  • Visible-break switch (two and three-position)
  • Mild and stainless steel construction
  • Tri-phase and TPG control
  • All standard combinations of load switches and fault interrupters

Features and benefits

  • Deadfront construction improves operator safety
  • Sealed design is resistant to flooding and contamination
  • 5 & 6 way units are ideal for large complexes with multiple loads
  • Idea relay allows enhanced protection and communication
  • Single or three-phase tripping for commercial or residential applications
  • Visible break with ground allows grounding without disconnecting cables
  • Envirotemp FR3 and E200 insulation eliminates environmental compliance costs
  • Optional solid cooper grounding rod makes grounding simple and convenient
  • Resettable VFI allows immediate service restoration
Download Links
  • iDP-210 feeder protection relay catalog
    This catalog describes ratings and ordering information for Eaton’s Cooper Power series Edison Idea iDP-210 full featured relay which is suitable for a variety of protection applications including feeder protection, reclosing, synch-check, frequency based load shedding, reverse power, overcurrent, over/under voltage and frequency.
    (PDF 1 MB , 28/08/2019)
    Download
  • iTAP-265 dual overcurrent relay catalog
    This catalog describes ratings and ordering information for Eaton’s Cooper Power series Edison Idea iTAP-265 full-featured relay which is suitable for overcurrent protection for two three-phase feeders in typical underground distribution switchgear applications.
    (PDF 427 KB , 01/04/2015)
    Download
  • VFI vacuum fault interrupter switchgear catalog
    This catalog describes ratings and ordering information for Eaton’s Cooper Power series VFI underground distribution switchgear which provides a simple, economical approach to protective requirements for 5, 15, 25 and 35 kV underground systems.
    (PDF 2 MB , 26/04/2021)
    Download
  • Eaton undergrounding products line card
    This line card outlines Eaton's comprehensive product portfolio for utility undergrounding as a strategy to improve grid resilience against extreme weather and natural disasters.
    (PDF 547 KB , 12/09/2025)
    Download
X
Download Close

Maintenance advice

Not finding the literature you need?

Visit this page for information on earlier models.

Additional literature

Related products

Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.
Company
Quick links
© 2025 Eaton. All Rights Reserved.