Fluke 1555 and 1550C Insulation Resistance Testers

Fluke 1555 and 1550C Insulation Resistance Testers

Fluke 1555 and 1550C Insulation Resistance Testers
Evaluate the trends. Eliminate the doubt.

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Product Description Fluke 1555 and 1550C Insulation Resistance Testers

The Fluke 1555 and 1550C Insulation Resistance Testers are high-voltage diagnostic tools designed for insulation testing in heavy-duty equipment such as switchgear, motors, generators, and power cables. Paired with the Fluke Connect App and ir3000 FC Connector, these instruments help improve safety and efficiency in insulation testing processes. Their advanced wireless capabilities allow users to capture, store, and analyze test results in real-time, significantly reducing manual data handling and increasing field productivity.

Both models are ideal for predictive and preventive maintenance programs, enabling technicians to detect insulation deterioration and prevent unplanned failures. With selectable voltages up to 10 kV (on the 1555), resistance measurements up to 2 TΩ, and a robust safety rating of CAT IV 600 V, these testers are built for rigorous industrial environments.

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Key Features Fluke 1555 and 1550C Insulation Resistance Testers

• Wide Range of Test Voltages:

  • Fluke 1550C: up to 5 kV

  • Fluke 1555: up to 10 kV

  • Selectable in 50 V steps (250–1000 V) and 100 V steps (>1000 V)

• Fluke Connect Compatibility:

  • Capture and trend data wirelessly

  • Store results for audit and analysis

  • Reduce paperwork with digital record-keeping*

• CAT III 1000 V / CAT IV 600 V Safety Rating:

  • Ensures safe operation in high-voltage environments

• High Measurement Range:

  • Insulation resistance measurements up to 1 TΩ (1550C) and 2 TΩ (1555)

  • Resistance accuracy: ±5% (main range), ±20% (upper range)

• Advanced Testing Features:

  • Ramp function for insulation breakdown testing

  • Capacitance measurement from 0.01 μF to 20.00 μF

  • Leakage current measurement from 1 nA to 2 mA

  • Timer settings up to 99 minutes for extended tests

• High Capacity and Battery Life:

  • Over 750 insulation tests per full charge

  • Powered by a 12 V lead-acid rechargeable battery (Yuasa NP2.8-12)

• User-Friendly Interface:

  • Large digital/analog combination LCD

  • Easy-to-read measurement results

  • Voltage warning system for live circuits (30 V to 1100 V AC/DC)

• Guard Terminal Function:

  • Eliminates surface leakage current effects on high-resistance readings

• Trend Analysis and Asset Management:

  • Identify insulation degradation over time

  • Fluke Connect Assets (sold separately) support asset history tracking*

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General Specifications

• Display Size: 475 mm x 105 mm

• Power Supply: 12 V rechargeable lead-acid battery

• Charger Input: 85 V to 250 V AC, 50/60 Hz

• Dimensions: 170 mm x 242 mm x 330 mm

• Weight: 3.6 kg

• Operating Temperature: -20 °C to +50 °C

• Storage Temperature: -20 °C to +65 °C

• Humidity: 80% up to 31 °C, decreasing linearly to 50% at 50 °C

• Altitude Limit: 2,000 meters

• IP Rating: IP40

• Input Overload Protection: 1000 V AC

• Electromagnetic Compatibility: EN 61326

• Safety Certifications:

  • IEC 61010-1 (Overvoltage Category II)

  • IEC 61010-2-030 (600 V CAT IV / 1000 V CAT III)

  • IEC 61557-1, IEC 61557-2

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Summary

The Fluke 1555 and 1550C Insulation Resistance Testers offer unmatched flexibility, safety, and reliability for high-voltage insulation testing in demanding industrial settings. With wide test voltage ranges, superior measurement accuracy, and wireless data capabilities through Fluke Connect, they provide comprehensive tools for maintenance programs focused on identifying insulation problems before failure. Whether for routine checks or critical diagnostics, these instruments streamline workflows, enhance safety, and support smarter maintenance decisions.