VFI Vacuum Fault Interrupter Switchgear

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

Back to search

Overview Technical Resources

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

Visit this page for information on earlier models.

Additional literature

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.