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G&W model VRPFI vault switches include load break and fault interrupting capability. The fault interrupters provide electronically controlled, resettable over current protection in a totally sealed, submersible, dead front device. The VRPFI is G&W’s most compact and economical SF6 insulated switch.  The switches are designed for use on 3-phase systems with voltages up to 27kV, 630A load break and continuous current, with 12.5kA symmetrical fault interrupting ratings. The VRPFI is ideal for vault style applications because it features front accessible switch operators and bushings (front access) so it can fit within tight sub surface vaults or equipment rooms.

The switches are designed to IEEE C37.71, C37.74, and C37.60 for load break and fault interrupting capability. 

  • The switch is completely submersible
  • Controls for overcurrent protection are packaged in NEMA4X enclosures for dry vaults, NEMA 6P enclosures for wet vaults or IP68 stainless steel enclosures for long term submersion.
  • Front accessible switch operators and bushings (front access) so the switch can fit in tight installations
  • For use on 15kV and 27kV systems with 630A continuous and load break ratings
  • 12.5kA symmetrical fault interrupting ratings fully tested to IEEE C37.60

VRPFI ratings

Maximum design voltage

15.5 kV

27 kV

Voltage class

15 kV

25 kV

Impulse level (BIL)

110 kV

125 kV

One minute withstand

35 AC kV

60 AC kV

One minute withstand, production test rating

34 AC kV

40 AC kV

15 minute withstand

53 DC kV

78 DC kV

Continuous and load break current

630 Amps

630 Amps

Momentary current

25.6 kA asym

20 kA asym

Fault close current, (3 times)

25.6 kA asym

20 kA asym

One second short circuit current

16 kA asym

12.5 kA asym

Fault Interrupter Symmetrical interrupting rating

12.5kA 12.5kA

Operations load interrupting endurance (15kV) at 600A



Mechanical endurance, operations



IEEE C37.60
Fault Interrupting Duty
Total number of fault interruptions: 116

Percent of Maximum Interrupting Rating

Approx. Interrupting Current, Amps

No. of Fault Interruptions

15 – 20%



45 – 55%



90 – 100%




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