Electronic Test Equipment Newsletter Signup
Get the Engineering360
Stay up to date on:
Everything from test instruments to test and inspection strategies, and equipment used in testing.


Product Announcement from Grace Engineered Products, Inc.


Electrical safety demands that we know the answer to one question: Is there voltage? A wrong answer can have severe consequences. The VoltageVision® (R-3W / R-3W-SR) is a reliable tool that helps answer that question. Typically hardwired to the load side of the disconnect or circuit breaker, the Voltage Vision® (R-3W) flashes (R-3W-SR has solid-on LEDs) whenever hazardous voltage is present in any individual phase .

After disconnecting power to an enclosure, electricians can pre-verify voltage isolation while the enclosure door is safely closed. The risk ofarc flash is reduced because electricians know if there is power inside the enclosure before re-verifying isolation with a meter. The Voltage Vision® (R-3W) is unmatched in its reliability due to its dual redundant circuitry and no separate power supply. Vo ltage Vision® (R-3W) gets its power from the same voltage that it indicates! Ask this question: Can you live without it?


  • Redundant Circuitry / Long Life LED' - either flashing or non-flashing
  • 40-750VAC / 30-1000VDC
  • Potted Construction with 6' Leads
  • Phase Insensitive
  • 30MM Pushbutton or Pilot Hole
  • High Surge Immunity
  • UL type 4X Listed


  • Circuit Breaker Disconnects - No Visible Blades
  • High Energy Panels (NFPA 70e Category III and IV)
  • Frequently Accessed Panels
  • Mechanical LOTO: Indicating Zero Energy
  • Panels with Multiple Power Sources