The UNI-T UT513A is a 5000V digital insulation resistance tester capable of measuring resistance up to 1000GΩ. PI, DAR, timed testing, data storage and USB connectivity support insulation assessment and analysis on high-voltage electrical equipment.
Key Features
- Selectable 500V, 1000V, 2500V and 5000V DC insulation test voltages, with resistance measurement up to 1000GΩ.
- Polarisation Index (PI) and Dielectric Absorption Ratio (DAR) functions help assess insulation condition over time.
- Automatic discharge and high-voltage output warning improve operator awareness following insulation testing.
- Stores up to 18 measurement records and supports USB data transfer to a computer for further analysis.
- Large 9999-count backlit display with a 30-segment analogue bar graph, comparison function and timed testing.
Product Specifications
| Insulation Resistance |
| Test Voltages |
500V / 1000V / 2500V / 5000V DC |
| Test Voltage Accuracy |
0% to +20% |
| 500V Range |
0.5MΩ–20GΩ |
| 1000V Range |
1MΩ–40GΩ |
| 2500V Range |
2.5MΩ–100GΩ |
| 5000V Range |
5MΩ–1000GΩ |
| Accuracy: 0.5MΩ–99.9MΩ |
±(3% + 5 digits) |
| Accuracy: 100MΩ–9.99GΩ |
±(5% + 5 digits) |
| Accuracy: 10GΩ–99.9GΩ |
±(10% + 5 digits) |
| Accuracy: 100GΩ–1000GΩ |
±(20% + 5 digits) |
| Nominal Test Current |
1mA |
| Short-Circuit Current |
Greater than 3mA |
| Voltage Measurement |
| DC Voltage Range |
30–600V DC |
| AC Voltage Range |
30–600V AC |
| Voltage Resolution |
1V |
| Voltage Accuracy |
±(2% + 3 digits) |
| Functions and Display |
| Display |
9999-count LCD with 30-segment analogue bar graph |
| Insulation Assessment |
Polarisation Index (PI) and Dielectric Absorption Ratio (DAR) |
| Data Storage |
18 groups |
| Data Interface |
USB |
| Timed Measurement |
Up to approximately 15 minutes |
| Additional Functions |
Comparison measurement, continuous measurement, automatic discharge, high-voltage warning, backlight and automatic power-off |
| General |
| Power Supply |
8 × 1.5V C batteries (LR14) |
| LCD Size |
123 × 58mm |
| Product Dimensions |
202 × 155 × 94mm |
| Net Weight |
2kg |
| Compliance |
IEC 61557-1 and IEC 61557-2 |
| Certifications |
CE and UKCA |
Applications
- Insulation testing of transformers, generators and high-voltage motors.
- Inspection of power cables, switchgear and electrical distribution equipment.
- Preventive maintenance in power generation, manufacturing, petrochemical and utility facilities.
- Insulation assessment of photovoltaic strings, inverters and combiner-box wiring.
Included Components
- UNI-T UT513A insulation resistance tester
- Black and green test leads with alligator clips
- Red test lead with alligator clip
- USB cable
- PC software
- Power adaptor
- 8 × 1.5V C batteries
- User manual
- Tool case