Fluke 1550C FC 5 kV Digital Insulation Tester

Brand: Fluke Corporation

The Fluke 1550C performs digital insulation testing up to 5 kV, and makes data collection easy through the Fluke Connect™ wireless app.

Remote operation lets you spend as little time as possible in potentially hazardous zones.

Real-time trending shows a live graph on your phone, rather than a hard-to-read set of changing values.

And you can create reports quickly, using pre-designed templates that you can customize with company logos.

It’s the perfect tool for preventive or predictive maintenance programs designed to identify potential equipment failures before they occur.

And it comes with a three-year warranty and CAT IV 600 V safety rating.
  • Quickly configure, start and stop tests on the 1550C remotely, a safe distance away from any operating, energized equipment, using Fluke Connect® and a smart phone
  • Real time trending gives you easy-to-see visual cues, rather than hard to read, rapidly changing values
  • Report creation using Fluke Connect desktop saves time and makes test results easier to understand
  • Fluke Connect saves test results to the cloud for analysis and preventive maintenance
  • Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) with no additional setup
  • Guard system eliminates the effect of surface leakage current on high-resistance measurements
  • Selectable test voltages in 50 V steps from 250 V to 1000 V, and 100 V steps above 1000 V
  • CAT III 1000 V, CAT IV 600 V safety rating
  • Warning function alerts the user that line voltage is present and gives the voltage reading up to 600 V AC or DC for increased user safety
  • Measurements can be stored in up to 99 memory locations, with each location assigned a unique, user defined, label for easy recall
  • Long battery life gives the user over 750 tests between charges
  • Large digital/analog LCD for easy viewing
  • Capacitance and leakage current measurement
  • Ramp function for breakdown testing
  • Resistance measurements up to 2 TΩ
  • Timer settings up to 99 minutes for timed tests
  • 3-year warranty



  • 75 x 105 mm


  • 12 V lead-acid rechargeable battery, Yuasa NP2.8-12

Operating Temperature

  • -20° C to 50° C
  • -4° F to 122° F


  • 80 % to 31° C decreasing linearly to 50 % at 50° C

Enclosure Rating

  • IP40

Electromagnetic Compatibility

  • EN 61326

Safety Compliance

  • IEC 61010-1: Overvoltage Category II, Pollution Degree 2
  • IEC 61010-2-030: Measurement 600V CAT IV / 1000V CAT III
  • IEC 61557-1
  • IEC 61557-2
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