Uni-T UT511 High-Voltage Insulation Resistance Tester

The Uni-T UT511 High-Voltage Insulation Resistance Tester is the entry-level model in the UT510 series, designed for insulation measurements at voltages up to 1000 V and a range up to 10 GΩ. It is ideal for diagnosing electrical installations, motors, or medium-voltage equipment where higher test voltages are not required. The device offers PI and DAR measurements, a memory for 18 results, and a clear 9999-count display with a bar graph, facilitating a quick assessment of insulation condition without the need for additional software.

Advantages

Suitable for standard measurements: The test voltage range of 100–1000 V makes the UT511 well-suited for daily service and inspection work. In practice, this means convenient testing of installations, cables, or motors without entering the ranges typical of advanced high-voltage testers. Extended insulation diagnostics: The PI and DAR functions allow for a more accurate assessment of insulation condition over time. This makes it possible not only to detect a fault but also to notice a gradual deterioration of parameters, which is important during periodic inspections. Clear display and user-friendly operation: The large display with a bar graph provides a quick overview of value changes during measurement. The backlight facilitates work in low-light conditions, and intuitive operation reduces setup time. Safe field operation: Automatic discharge after measurement and high-voltage warning reduce the risk of electric shock.

Suitable for

• Electrical installation testing
• Motor and generator insulation diagnostics
• Medium-voltage equipment maintenance
• Periodic safety inspections

Key specifications

• Insulation test voltages: 100V, 250V, 500V, 1000V
• Max insulation resistance: 5GΩ (at 1000V)
• Short circuit current: <2mA
• DC voltage measurement: 30V to 1000V
• AC voltage measurement: 30V to 750V
• Resistance measurement: 0.1Ω to 999.9Ω
• Continuity test with buzzer
• PI and DAR tests
• Data storage: 18 groups
• Display: LCD with backlight, 9999 counts
• Auto ranging
• Power: 8 x 1.5V AA batteries
• Safety: CAT III 1000V, CAT IV 600V
• Operating temperature: 0°C to 40°C

Recommendations

For professionals seeking a reliable and safe insulation tester for routine maintenance and troubleshooting, the Uni-T UT511 offers essential features at an entry-level price point. Its combination of multiple test voltages, PI/DAR diagnostics, and robust safety features makes it a valuable tool for electricians and technicians.