Overview
The FR MRT 1050 is a professional-grade digital insulation tester designed to measure the integrity of electrical insulation. By applying a high-voltage, low-current DC charge, it identifies leakage paths and moisture in motor windings, transformers, and high-voltage cables. Whether you are commissioning a new solar PV system or performing routine maintenance on industrial machinery, the MRT 1050 provides the accuracy and safety required for high-voltage diagnostics.
Key Features ✨
Multiple Test Voltages: Selectable ranges ($100V, 250V, 500V, \text{and } 1000V$) to suit various equipment standards.
Large Backlit Display: Easy-to-read digital screen with an analog bar graph for real-time trend monitoring.
Safety First: Built-in high-voltage warning and automatic discharge of capacitive circuits after testing.
Data Hold & Lock: “Lock” feature allows for continuous hands-free testing during long-duration insulation resistance (IR) tests.
Rugged Housing: Includes a protective rubber holster to withstand the harsh environments of construction sites and factories.
Technical Specifications
| Feature | Specification |
| Output Test Voltage | 100V / 250V / 500V / 1000V |
| Resistance Range | 0.1MΩ to 2000MΩ (2GΩ) |
| AC Voltage Test | Up to 750V |
| Short Circuit Current | < 2mA |
| Power Supply | 6 x 1.5V AA Batteries |
| Safety Rating | CAT III 600V / IEC 61010-1 |
| Auto-Discharge | Yes, automatic discharge of tested circuits |
Common Applications
Solar Installers: Testing string insulation and grounding in PV systems.
Motor Repair: Checking for winding degradation in AC/DC motors.
Industrial Maintenance: Testing switchgear, transformers, and busbars.
Home Inspection: Identifying faulty or aging wiring behind walls.


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