Field Instruments

Product Overview

The Fluke 1555 Insulation Resistance Tester is a professional, high-voltage insulation tester designed for testing, troubleshooting, and preventive maintenance of high-value electrical assets. With insulation test voltages up to 10 kV, the Fluke 1555 is ideally suited for insulation testing of switchgear, motors, generators, transformers, and high-voltage cables in industrial and utility environments.

Built for safety, accuracy, and long-term reliability, the Fluke 1555 features advanced diagnostic capabilities such as PI, DAR, ramp testing, leakage current measurement, and long-duration timed tests. Its rugged construction, large digital/analog display, and Fluke Connect compatibility make it a powerful tool for predictive maintenance and asset health trending

Key Features

• High-voltage insulation testing up to 10 kV DC
• Selectable test voltages from 250 V to 10,000 V
• Insulation resistance measurement up to 2 TΩ
• PI (Polarization Index) and DAR (Dielectric Absorption Ratio) diagnostics
• Ramp test function for insulation breakdown analysis
• Leakage current and capacitance measurement
• Guard terminal eliminates surface leakage errors
• Automatic discharge of capacitive loads for user safety
• Large digital/analog LCD for easy trend interpretation
• Fluke Connect™ compatibility for wireless data storage and trending
• Long battery life with over 750 tests per charge

Technical Specifications

Brand: Fluke
Model: 1555
Type: High-Voltage Insulation Resistance Tester

Insulation Test Voltages

• 250 V
• 500 V
• 1000 V
• 2500 V
• 5000 V
• 10,000 V (10 kV)

Insulation Resistance Range

• Up to 2 TΩ
• Bar-graph range: 0 to 2 TΩ

Functions

• Insulation resistance measurement
• PI / DAR timed ratio tests
• Ramp test for breakdown detection
• Leakage current measurement
• Capacitance measurement
• Timed tests up to 99 minutes
• Automatic discharge after test completion
• Live voltage warning before testing

Display

• Large digital/analog LCD display for clear readings and trend visualization

Safety Ratings

• CAT IV 600 V
• CAT III 1000 V
• IEC 61010-1 and IEC 61557 compliant

Construction

• Rugged industrial enclosure
• Portable design suitable for field and substation work
• IP40 enclosure protection

Power Supply

• 12 V rechargeable sealed lead-acid battery
• AC charger input: 85 V – 250 V, 50/60 Hz

Applications

• High-voltage motor and generator insulation testing
• Transformer and switchgear insulation diagnostics
• Cable insulation testing (MV & HV)
• Electrical commissioning and acceptance testing
• Preventive and predictive maintenance programs
• Utility, industrial, and energy sector inspections

Why Buy from FieldInstruments.lk?

• 100% genuine Fluke instruments
• Fast delivery across Sri Lanka
• Competitive pricing
• Trusted supplier for professional test & measurement equipment
• Local technical support and reliable after-sales service

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk