UNI-T UT268B Wireless Large Current Fork Meter
The UNI-T UT268B Wireless Large Current Fork Meter is a compact, rechargeable instrument engineered for safe, in-circuit analysis of three-phase power networks. Leveraging advanced microprocessor and digital signal-processing circuitry, it captures a full suite of industrial-frequency parameters including voltage, RMS current, power (active, reactive and apparent), frequency, power factor and phase relationships without interrupting service thanks to its non-intrusive fork-type current transformer design. Its sizeable φ50 mm jaw accommodates heavy conductors and busbars, while a high-brightness backlit display provides clear real-time visualization of readings and vector diagrams.
Built around a rugged, double-insulated housing, the UT268B mounts securely via three dedicated input ports for both voltage leads and current clamps, minimizing wiring errors and ensuring operator safety. A built-in data buffer holds up to 500 measurement sets, which can be reviewed on the meter or exported via USB to a PC for deeper analysis and reporting.
Automatic power-off preserves battery life, and low-battery indication prompts timely recharging of its large-capacity 3.7 V lithium cell. Designed for field technicians and maintenance crews, the UT268B combines portability with precision, enabling efficient diagnostics, commissioning, and troubleshooting of high-current installations without ever disconnecting live conductors.
Features:
- Measures three-phase voltage, current, phase angle and frequency.
- Measures power (active, reactive, apparent), power factor and total power.
- Measures grid frequency and phase sequence.
- Automatically identifies transformer windings, capacitive vs. inductive loads, and detects incorrect wiring in 3-phase three-wire and four-wire systems.
Specifications:
| Category |
Specification |
| Power Supply: |
DC 3.7 V large-capacity rechargeable lithium battery;
max. consumption 250 mA with backlight on ( > 5 h working time) |
| Display: |
LCD (71 × 52 mm), backlit |
| Dimensions: |
187 × 191 × 51 mm (L × W × T) |
| Weight: |
Meter: 450 g (incl. battery);
each large-caliber clamp: 440 g;
test lead: 250 g |
| Voltage Range: |
AC 0.00 V – 600 V
Resolution 0.01 V |
| Current Range: |
AC 0.0 mA – 1000 A
Resolution 0.1 mA |
| Phase Angle: |
0.0° – 360.0°
Resolution 0.1°
Accuracy ±1° |
| Frequency: |
45.00 Hz – 65.00 Hz
Resolution 0.01 Hz
Accuracy ±0.1 Hz |
| Active Power: |
0.0 W – 600 kW
Resolution 0.1 W
Accuracy ±(3% + 3 dgt) |
| Reactive Power: |
0.0 VAR – 600 kVAR
Resolution 0.1 VAR
Accuracy ±(3% + 3 dgt) |
| Apparent Power: |
0.0 VA – 600 kVA
Resolution 0.1 VA
Accuracy ±(3% + 3 dgt) |
| Power Factor: |
–1 – +1
Resolution 0.001
Accuracy ±0.03 |
| 3-Phase Total Power Display: |
Shows total active, reactive, and apparent power plus overall PF in “T” line |
| Current Vector Sum: |
0 mA – 3000 A
Resolution 1 mA |
| Clamp Jaw Opening: |
Up to φ 50 mm |
| Test Lead Length: |
1.5 m |
| Clamp Lead Length: |
2 m |
| Data Storage: |
Up to 500 groups |
| Interface: |
USB port for data upload to PC |
| Auto Power-Off: |
After ~15 min of inactivity |
| Testing Rate: |
2 s per complete 3-phase reading |
| Operating Conditions: |
–10 °C – 40 °C; up to 80% RH |
| Storage Conditions: |
–10 °C – 60 °C; up to 70% RH |
| Input Impedance: |
2 MΩ (voltage measurement) |
| Withstand Voltage: |
1000 V/50 Hz AC between circuit & casing, 1 min |
| Insulation Resistance: |
≥ 100 MΩ between circuit & casing |
| Structure & Safety: |
Double-insulated housing; IEC 61010-1 CAT III 600 V, IEC 61010-031, IEC 61326, Pollution Class 2 |
Applications:
- Three-phase power monitoring.
- Phase angle and phase sequence detection.
- Transformer inspection.
- Load type identification.
- Live-line diagnostics.
- 3-phase 3-wire and 4-wire system testing.
- Data analysis and reporting.
Package Include:
- 1x Voltammeter (main unit)
- 1x Carrying box
- 3x Large-caliber current clamps
- 4x Test leads (yellow, green, red, black)
- 1x Charger + USB cable
- 1x User manual
UNI-T UT268B Documents:
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