When installing industrial 3-phase motors, HVAC systems, or distribution panels, connecting phases incorrectly can cause costly motor reverse-rotation damage or equipment failure. Guessing wiring orientation is a major safety hazard. The UNI-T UT261A 3-Phase Sequence Indicator provides a professional electrical testing solution, designed to accurately determine 3-phase power sequence and detect missing phases safely across wide voltage ranges without requiring batteries.
Wide AC Voltage Detection: Capable of measuring and operating across a broad AC voltage span from 40V to 690V.
Broad Frequency Range Support: Engineered to handle standard industrial power frequencies ranging from 15Hz up to 400Hz.
Clear LCD Indication: Features an integrated LCD screen for instant visual display of phase sequence and missing phase status.
Battery-Free Operation: Draws minimal operating current directly from the test lines, eliminating the need for replacement batteries.
Rugged Job-Site Durability: Built to withstand accidental drops and impacts from a height of up to 2 meters.
| Feature | Specification |
| Product Type | 3-Phase Sequence and Missing Phase Indicator |
| Brand / Model | UNI-T UT261A |
| AC Voltage Range | 40V to 690V |
| Frequency Range | 15Hz to 400Hz |
| Working Current | < 3mA |
| Display | LCD Panel |
| Power Source | No Battery Required |
| Safety / Protection | CAT III 600V, IP40 |
| Application | 3-Phase Motor Installation, Distribution Panels, Industrial Maintenance |
Motor & Pump Installation: Ensures correct phase sequencing before starting heavy 3-phase industrial motors and compressors.
Electrical Panel Maintenance: Quickly identifies missing phases and live wiring faults during troubleshooting routines.
Note to customers: Always inspect test leads for insulation damage before connecting to high-voltage industrial circuits!
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