Greenlee 5124 Phase Sequence and Motor Rotation Meter (Non-Contact Tester)

The Greenlee 5124 Phase Sequence and Motor Rotation Meter is a compact, easy-to-use diagnostic tool built for electricians and industrial technicians who work with three-phase power and motor systems. The 5124 verifies phase sequence and identifies motor rotation direction — including non-contact rotation testing on running motors — helping you prevent costly motor damage, equipment failures, and rework on commercial and industrial jobs.

Key Features & Benefits

• Phase Sequence Detection: Quickly verify correct phase rotation (A-B-C or 1-2-3) on three-phase power sources before connecting equipment — prevents damage to motors, compressors, and pumps caused by reverse rotation.
• Motor Rotation Direction Testing: Identify the rotational direction of industrial motors, compressors, generators, and pumps before energizing — critical for HVAC, pumping, and conveyor installations.
• Non-Contact Motor Rotation: Determine rotation direction on running single-phase and three-phase motors without using leads — fast, safe testing without disconnecting power.
• CAT III 600V Safety Rating: Built for use on distribution panels, motor control centers, and industrial circuits.
• Wide Voltage Range (90V – 600V AC): Tests low-voltage commercial to high-voltage industrial systems with one instrument.
• Frequency Range 15 Hz – 400 Hz: Works with standard 50/60 Hz systems and variable frequency drive (VFD) outputs.
• Bright LED Indicators: Easy-to-read display shows phase sequence and rotation direction at a glance — no decoding required.
• Compact & Portable: 123 × 71 × 29 mm housing fits easily in a tool pouch or service bag.
• CE & cETLus Certified: Meets international safety and quality standards.

Common Applications

• Three-Phase Motor Installation: Verify correct phase sequence before energizing motors to prevent reverse rotation damage
• HVAC Service & Installation: Confirm compressor and blower motor rotation direction
• Pump & Compressor Verification: Critical for centrifugal pumps and air compressors where reverse rotation causes immediate damage
• VFD Output Testing: Wide frequency range works with variable frequency drive outputs
• Industrial Troubleshooting: Quick diagnostic check on running equipment without shutdown
• Generator Phasing: Verify generator output phase sequence before paralleling or connecting to load

Specifications

• Model / SKU: Greenlee 5124
• Type: Phase Sequence and Motor Rotation Meter
• Voltage Rating: CAT III, 600V
• Operating Voltage Range: 90V – 600V AC
• Frequency Range: 15 Hz – 400 Hz
• Display: LED indicators
• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Dimensions: 123 × 71 × 29 mm (4.84" × 2.80" × 1.14")
• Standards Compliance: CE, cETLus

What's Included

• (1) Greenlee 5124 Phase Sequence and Motor Rotation Meter
• (3) Tri-colored banana test leads
• (3) Alligator clips
• (1) 9V battery
• (1) Soft carrying case

Buy the Greenlee 5124 Phase Rotation Meter in Houston & San Antonio, TX

Tool Mart is your local Texas source for Greenlee electrical testing equipment. Order the Greenlee 5124 online for same-day pickup at our Houston or San Antonio retail locations, or request fast local delivery. We support electrical contractors, industrial technicians, HVAC service crews, and maintenance teams across the Houston metro area with stocked inventory of Greenlee meters, testers, and accessories.

Need additional test equipment or have questions about phase rotation testing? Call our Houston store or visit us in person — our team is happy to help.