UNI-T UT262E Non-Contact 3 Phase Phase Sequence Detector is a professional electrical maintenance testing instrument for electricians, HVAC technicians, factory maintenance workers and electrical contractors. Adopting clamp-type non-contact induction measurement design, this tester requires no stripping of wire insulation and no direct contact with exposed high-voltage live cables. Users only need to clip three induction clamps on the outer insulation of three-phase wires to complete phase sequence inspection.|
This multi-functional measuring tool integrates phase sequence judgment, live wire detection, circuit routine inspection, phase loss identification, breakpoint searching and breakpoint positioning functions. Working conditions are clearly displayed via LED indicator lights and differentiated buzzer prompts, greatly improving the safety of on-site operation and effectively avoiding electric shock risks. It is an ideal testing device for three-phase power circuit inspection, motor commissioning and daily electrical overhaul work.
Core Functions and Features
1. True Non-contact Inductive Clamp MeasurementThere is no need to peel off cable insulation, and induction detection can be realized through the outer plastic sheath, which effectively prevents electric shock hazards caused by touching bare live conductors. It fits insulated cables with an outer diameter ranging from 2mm to 40mm.
2. Comprehensive Circuit Fault RecognitionIt can detect common three-phase wiring faults including normal forward phase, reverse phase, two wires bundled inside one cable, missing Phase A, missing Phase B and missing Phase C.
3. Dual Reminder of LED Indicators and BuzzerIndependent R/S/T indicator lamps cooperate with variable-frequency buzzer alarms. Exclusive light and sound reminders are set for each working condition, which can be easily identified even in noisy workshops and construction sites.
4. Intelligent Auto Power-off for Energy SavingThe tester will automatically shut down after 5 minutes of standby to avoid power loss caused by forgetting manual shutdown during busy field work. It can support more than 20 hours of continuous operation with AA batteries.
5. Industrial IP52 Dustproof and Splash-proof ProtectionThe sealed engineering plastic housing reaches IP52 protection grade, adapting to dusty workshops, damp construction sites and complex outdoor operating environments.
6. Authoritative International Safety CertificationsIt has passed CE and UKCA certifications and complies with standards EN61010-1:2001 and EN61010-031:2002. With industrial safety ratings of CAT III 1000V and CAT IV 600V, the clamp probes can withstand 8000V transient overvoltage, fully meeting electrical safety operation standards in Europe and North America.
7. Portable Compact Body with Complete AccessoriesThe overall dimension is 88mm × 66mm × 30mm. The lightweight design weighs 237.7g with batteries, and a storage bag is equipped for convenient storage and outdoor carrying.
Official Complete Technical Specifications
Model: UNI-T UT262E
Test Method: Non-contact clamping induction detection
Measurable Voltage Range: Three-phase AC 70V ~ 1000V, sine wave continuous input
Operating Frequency: 45Hz ~ 66Hz, automatic recognition for standard 50Hz/60Hz mains power grid
Applicable Wire Outer Diameter: Φ2mm ~ Φ40mm insulated cable
Clamp Parameter: Double-insulated LDPE clamp, OD 35mm, extension wire length 0.6m
Power Supply: 2 × 1.5V AA alkaline batteries
Continuous Working Time: More than 20 hours
Power Consumption: Off-state current ≤10uA@3V, maximum average working current 70mA@3V
Low Battery Alert: Indicator flashes slowly below 2.4V for low power reminder; buzzer beeps twice below 2V for power-off warning
Auto Power Off: Automatic shutdown after 5 minutes standby with double beep prompt
Operating Temperature: 0℃ ~ 50℃
Operating Humidity: ≤85% RH, non-condensing
Storage Temperature: -20℃ ~ 60℃
Applicable Altitude: Below 2000m
Button Service Life: 10,000 press cycles
Insulation Strength: 3.7kVrms
Buzzer Volume: 65 ~ 70dB
IP Protection Grade: IP52
Safety Standard: CAT III 1000V, CAT IV 600V, 8000V transient overvoltage, Pollution Class 2
Certification: CE, UKCA
Product Color: Red & Black
Weight: 237.7g (with batteries), 191.5g (without batteries)
Overall Size: 88mm(L) × 66mm(W) × 30mm(H)
Detailed Working Status Instruction
Normal forward phase: Power-on indicator stays solid blue, R, S, T lights keep red on, forward phase green light is on, reverse phase light turns off, buzzer makes slow intermittent beeps.
Reverse phase connection error: Power-on indicator stays solid blue, R, S, T lights keep red on, forward phase light turns off, reverse phase red light is on, buzzer makes fast intermittent beeps.
No phase loss with two wires wrapped in one cable: Power-on indicator stays solid blue, R, S, T lights keep red on, both forward and reverse phase lights turn off, the buzzer keeps silent.
Missing Phase A: Power-on indicator stays solid blue, R light goes out, S and T lights keep red on, both phase indicator lights turn off, buzzer makes no sound.
Missing Phase B: Power-on indicator stays solid blue, S light goes out, R and T lights keep red on, both phase indicator lights turn off, buzzer makes no sound.
Missing Phase C: Power-on indicator stays solid blue, T light goes out, R and S lights keep red on, both phase indicator lights turn off, buzzer makes no sound.
Wide Application Scenarios
It is used for rotation calibration of industrial three-phase motors to check phase sequence before startup and avoid reverse rotation damage to fans, water pumps, compressors and production line driving equipment.
It fits wiring inspection for HVAC air conditioners and water pumps, calibrating circuits of three-phase outdoor air conditioner units, cooling tower pumps and ventilation blowers for installation and after-sales maintenance troubleshooting.
It applies to overhaul of factory low-voltage distribution cabinets, detecting phase loss, reverse phase and irregular cable wiring faults for daily power safety inspection and equipment breakdown maintenance of manufacturing workshops.
It serves electrical acceptance for construction and new buildings, completing three-phase circuit inspection for factories, shopping malls and warehouses to ensure wiring compliance with international electrical safety codes.
It supports circuit breakpoint search and positioning, quickly finding wire breakpoints and hidden line faults for household, commercial and industrial power circuits.
Standard Packing List
1 x UNI-T UT262E Non-contact Phase Detector
1 x User Instruction Manual
1 x Fabric Storage Carry Bag
1 x Factory Inspection Certificate