UNI-T UT261A Phase Sequence Indicator Product Overview of UT261A The UNI-T UT261A Phase Sequence Indicator is a professional electrical testing device designed to identify phase sequence and detect missing phases in three-phase power systems. It is commonly used by electricians, maintenance technicians, and industrial installers to verify the correct phase order before connecting motors, pumps, compressors, and other three-phase equipment. The UT261A operates across a wide AC voltage range of 40V to 690V and supports a frequency range from 15Hz to 400Hz, making it suitable for most industrial electrical systems. Built with a durable impact-resistant housing, the device can withstand drops from up to 2 meters, ensuring reliable performance in demanding job-site environments. Key Features of UT261A • Phase Sequence Detection – Identifies correct phase order in three-phase systems• Missing Phase Indication – Quickly detects phase loss or wiring issues• Wide Voltage Range – Supports 40V to 690V AC testing• Wide Frequency Range – Operates between 15Hz to 400Hz• Durable Construction – Withstands impacts from up to 2 meters• Clear LCD Display – Provides easy phase indication results Technical Specifications of UT261A Specification Details Brand UNI-T Model UT261A Product Type Phase Sequence Indicator Voltage Range 40V – 690V AC Frequency Range 15Hz – 400Hz Working Current < 1mA Phase Sequence Indication LCD Display Missing Phase Indication LCD Display Motor Rotation Test Not Available (UT261B only) Power Supply No Battery Required Product Dimensions 123mm × 71mm × 29mm Net Weight 160g Product Color Red & Grey Comparison within UT261 Series Model Voltage Range Phase Sequence Missing Phase Motor Rotation Display UT261A 40V–690V Yes Yes No LCD UT261B 90V–600V Yes Yes Yes LED Typical Applications The UNI-T UT261A Phase Sequence Indicator is commonly used for: • Electrical installation and maintenance• Industrial motor installation• HVAC system wiring verification• Generator and power distribution testing• Troubleshooting three-phase power systems Package Includes 1 × UNI-T UT261A Phase Sequence Indicator3 × Test Leads with Alligator Clips1 × Carrying Bag1 × User Manual Certifications The UT261 Series complies with international safety standards including: • CE• UKCA• cETLus Why Choose the UNI-T UT261A? ✔ Reliable testing tool from UNI-T✔ Wide 40V–690V testing capability✔ No battery required, ready to use anytime✔ Durable 2-meter drop resistance✔ Ideal for electricians and industrial maintenance FAQs What does the UNI-T UT261A measure?The UT261A determines the phase sequence and detects missing phases in three-phase electrical systems. Can the UT261A test motor rotation direction?No. Motor rotation testing is available on the UT261B model, not UT261A. Does the UT261A require a battery?No. The device operates directly from the tested circuit and does not require a battery. What voltage range can the UT261A test?The tester supports 40V to 690V AC three-phase systems.
