UNI-T UT279 Transformer Grounding Current Tester
The UNI-T UT279 Transformer Grounding Current Tester is designed to perform online measurements of grounding and leakage currents in transformer iron cores, enabling technicians to detect potential faults without interrupting service. Housed in a rugged handheld unit, it incorporates a clamp-on sensor that encircles grounding wires or cores, allowing non-contact current sensing. The tester’s internal microprocessor processes signals captured by its high-permeability magnetic core, filtering noise and isolating true leakage currents even in environments with strong electromagnetic interference.
Data are presented on a vibrant color touchscreen, displaying both numerical readings and waveform visuals in real time, facilitating rapid assessment of transformer health. A built-in memory stores measured values and waveforms, which can be transmitted via a USB connection to a computer for further analysis. The device is powered by standard alkaline batteries, ensuring portability and ease of replacement in the field. Its ergonomic design balances weight and form factor to enable single-handed operation, while its durable construction withstands the rigors of industrial environments.
Overall, the UT279 exemplifies a modern approach to transformer maintenance, combining intuitive touch controls, reliable signal processing, and convenient data handling in a single instrument. Its seamless integration of hardware and software effectively streamlines preventive maintenance tasks.
Features:
- Leakage current measurement capability for detecting grounding faults and loops.
- Large 80 mm × 80 mm clamp jaw allowing easy clamping of thick grounding wires or flat steel conductors.
- Online non-contact measurement clamp-on design requires no disconnection of the circuit under test.
- Strong anti-interference design (permalloy core with magnetic shielding) for accurate readings in high-EMI environments.
- Audible and visual alarm function with adjustable threshold settings.
- 3.5 inch color touch-screen LCD for intuitive operation and real-time waveform display.
- On-board data storage for up to 200 sets of readings and waveforms.
- PC software analysis via USB interface for data download, viewing, and printing.
Specifications:
| Category | Specification |
|---|---|
| Functionality: | Grounding current, AC leakage current, AC current testing |
| Power Supply: | DC 9V (6 × 1.5V alkaline batteries, LR6) |
| Test Method: | Clamp-shaped current transformer (CT) |
| Clamp Jaw Size: | 80 mm × 80 mm (Ø80 mm wire or 96 mm × 4 mm flat steel) |
| Measurement Range: | AC 0.00 mA – 100 A |
| Resolution: | 0.01 mA (0–0.99 mA) 0.1 mA (1.0–99.0 mA) 1 mA (100–999 mA) 0.1 A (1.0–100 A) |
| Accuracy: | ±(0.5% + 5 digits) |
| Frequency Range: | 10 Hz – 1000 Hz |
| Display: | 3.5″ color touch LCD (320 × 240 px; 71 × 53 mm active area) |
| Operation: | Touchscreen and button control |
| Sampling Rate: | 1 time/second |
| Data Storage: | 200 sets (retained during power-off or battery change) |
| Auto Power Off: | Default after 5 min (adjustable 000–999 min) |
| Clock & Numbering: | Date/time display and setting; test point numbering |
| Alarm Setting: | Threshold: 10 mA – 99.99 A; visual and audible alerts |
| USB Interface: | For PC connection, data download, and printing |
| Over-Range Indication: | “OL” displayed |
| Low Battery Indicator: | Shows at ≤ 7.2 V |
| Rated Current Consumption: | ≤ 180 mA |
| Clamp Lead Length: | 2 meters |
| Operating Temperature: | –10 °C to 40 °C; ≤ 80% RH |
| Storage Temperature: | –10 °C to 60 °C; ≤ 70% RH |
| Insulation Strength: | AC 2 kV rms (screw to casing) |
| Compliance Standards: | IEC1010-1, IEC1010-2-032, CAT III 600V, IEC61326 |
| Tester Dimensions: | 198 × 100 × 45 mm |
| Clamp Dimensions: | 194 × 145 × 40 mm |
| Tester Weight: | 450 g (with batteries) |
| Clamp Weight: | 780 g |
Applications:
- Transformer Maintenance and Fault Detection.
- Power Substation and Generation Plant Testing.
- Grounding Inspection in Electric Power Systems.
- Industrial and Mining Electrical Diagnostics.
- Railway and Transportation Infrastructure Monitoring.
- Telecommunication Grounding Verification.
- Educational and Research Demonstrations.
- Oil Field and Heavy Industry Electrical Testing.
Package Include:
- 1x Tester unit with integrated current clamp
- 1x USB cable for data communication
- 1x Protective tester storage box
- 6x Alkaline batteries (AAA, 1.5 V × 6) for power
- 1x User manual
Reviews
There are no reviews yet.