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Fluke 1550C 5 kV Digital Insulation Tester
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Fluke 1550C 5 kV Insulation Tester makes data collection from insulation tests easy

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.

Additional product capabilities will become available throughout 2018 and beyond.

Electrical Specifications
The tester's accuracy is specified for one year after calibration at operating temperatures of 0°C to 35°C. For operating temperatures outside the range (-20°C to 0°C and 35°C to 50°C), add ± .25% per °C, except on the 20% bands add ± 1% per °C.
Insulation Resistance Measurement
Test voltage (DC)
250 V Range < 250 kΩ,
250 kΩ to 5 GΩ
5 GΩ to 50 GΩ
> 50 GΩ
Accuracy (± reading) Unspecified
5%
20%
Unspecified
500 V Range < 500 kΩ
500 kΩ to 10 GΩ
10 GΩ to 100 GΩ
> 100 GΩ
Accuracy (± reading) Unspecified
5%
20%
Unspecified
1000 V Range < 1 MΩ
1 MΩ to 20 GΩ
20 GΩ to 200 GΩ
> 200 GΩ
Accuracy (± reading) Unspecified
5%
20%
Unspecified
2500 V Range < 2.5 MΩ
2.5 MΩ to 50 GΩ
50 GΩ to 500 GΩ
> 500 GΩ
Accuracy (± reading) Unspecified
5%
20%
Unspecified
5000 V Range < 5 MΩ
5 MΩ to 100 GΩ
100 GΩ to 1 TΩ
> 1 TΩ
Accuracy (± reading) Unspecified
5%
20%
Unspecified
Bar graph range 0 to 1 TΩ (1550C) - 0 to 2 TΩ (1555)
Insulation test voltage accuracy -0%, +10% at 1 mA load current
Induced AC mains current rejection 2 mA maximum
Charging rate for capacitive load 5 seconds per μF
Discharge rate for capacitive load 1.5 s/μF
Leakage current measurement Range 1 nA to 2 mA
Accuracy ± (5% + 2 nA)
Capacitance measurement Range 0.01 μF to 15.00 μF
Accuracy ± (15% rdg + 0.03 μF)
Timer Range 0 to 99 minutes
Resolution setting 1 minute
Resolution indication 1 second
Live circuit warning Warning range 30 V to 660 V AC/DC, 50/60 Hz
Voltage accuracy ± (15% + 2 V)
Software specifications FlukeView Forms™ basic software requires a PC running Windows XP, Windows Vista , Windows 7 or Windows 8.
General Specifications
Display 75 x 105 mm
Power 12 V lead-acid rechargeable battery, Yuasa NP2.8-12
Charger Input (AC) 85 V to 250 V AC 50/60 Hz 20 VA
This Class II (double insulated) instrument is supplied with a Class 1 (grounded) power cord. The protective earth terminal (ground pin) is not connected internally. The extra pin is for added plug retention only.
Dimensions 269 x 277 x 160 mm (10.6 x 10.9 x 6.3 in)
Weight 3.7 kg (8.2 lb)
Temperature (operating) -20°C to 50°C (-4°F to 122°F)
Temperature (storage) -20°C to 65°C (-4°F to 149°F)
Humidity 80% to 31°C decreasing linearly to 50% at 50°C
Altitude 2000 m
Enclosure sealing IP40
Input overload protection 1000 V AC
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
  • 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
Fluke 1550C 5 kV Insulation Tester

Includes:

  • Test cables with alligator clips (red, black, green)
  • Infrared adapter with interface cable
  • AC power cord
  • Soft carrying case
  • English manual
  • User's manual on CD-ROM
  • Quick reference card
  • Software license agreement
  • Registration card
  • USB-IR cable installation guide