Victor 3 Phase Sequence Tester – Compact, Accurate, and Durable 3-Phase Rotation Indicator 850 850A

Comprehensive Phase Status Indication

• The phase sequence tester uses three independent orange LEDs to show phase presence. If a phase is missing, the corresponding orange LED will not light up, allowing instant open-phase detection.
• A dedicated green LED confirms correct phase sequence (R-L), while a red LED immediately indicates phase sequence inversion (L-R), preventing reverse motor rotation and equipment damage.
• Clear visual logic eliminates guesswork, making this phase sequence tester ideal for both experienced electricians and trainees.

Multi-Tone Audible Buzzer Feedback

• The built-in buzzer provides three distinct patterns: rapid intermittent beep for correct sequence, slow intermittent beep for reversed sequence, and a continuous beep for open phase.
• Audible alerts allow users to keep their eyes on the test probes or rotating machinery, enhancing safety and efficiency.
• This phase sequence tester ensures no critical fault goes unnoticed, even in noisy industrial environments.

Two Models for Different Voltage Ranges

• Model 850: operating voltage 200–480V AC, time limit 4 minutes at 480V, 30 minutes below 200V.
• Model 850A: operating voltage 200–600V AC, time limit 2 minutes at 600V, 30 minutes below 200V – ideal for higher voltage systems.
• Both models cover 20Hz–400Hz frequency range, making this phase sequence tester compatible with variable frequency drives and standard mains.

High Electrical Safety Margin

• Model 850 withstands 2000V/min; Model 850A withstands 4000V/min, providing extra protection against voltage spikes.
• CE certification ensures compliance with international safety standards.
• Using this phase sequence tester reduces the risk of arc flash and electrical shock during three-phase verification.

Ultra-Portable and Lightweight

• Dimensions: 100*64*23mm – fits easily into a tool pouch or pocket.
• Weight only 129g, reducing fatigue during extended field use.
• The compact design of this phase sequence tester allows one-handed operation in cramped electrical cabinets or behind machinery.

Sturdy Construction for Daily Use

• Designed with durable housing that resists impact and abrasion.
• Alligator clips are included for secure connection to busbars, terminals, or cable lugs.
• This phase sequence tester maintains accuracy and reliability even after repeated field drops and pulls.

Simple Operation – No Complex Settings

• Connect the three leads to L1, L2, L3 (or R, S, T) and instantly read phase status from LEDs and buzzer.
• No battery or external power required; the phase sequence tester is powered by the test voltage itself.
• Ideal for rapid troubleshooting, pre-commissioning checks, and routine maintenance.

Complete Package – Ready to Use

• Each unit comes with: main tester, color box, instrument cloth bag, instruction manual, certificate of conformity, and three alligator clips.
• No hidden accessories to buy – this phase sequence tester is field-ready from the first use.
• Instruction manual includes clear connection diagrams and interpretation of LED/buzzer patterns.

Wide Application Range

• Suitable for motors, generators, pumps, compressors, conveyors, HVAC systems, and industrial control panels.
• Helps prevent costly damage caused by reverse rotation of pumps or fans.
• Every phase sequence tester in the VICTOR 850 series is a cost-effective tool to ensure three-phase systems are wired correctly before startup.

Time-Limited Operation for Safety

• Explicit time limits remind users to avoid prolonged connection to high voltages (e.g., 480V for 4 min on model 850).
• This safety feature encourages efficient testing habits and extends product lifespan.
• The phase sequence tester is designed for intermittent use as per industry best practices.

Ideal for Training and Education

• Simple LED/buzzer logic makes it a great teaching aid for vocational schools and apprenticeship programs.
• Students can quickly learn to identify correct sequence, reverse sequence, and open phase without complex meters.
• Durable construction withstands classroom environments.

Trusted VICTOR Quality

• VICTOR is a recognized brand in test and measurement tools.
• The 850 series phase sequence tester combines decades of electrical testing expertise into a user-friendly, affordable device.
• Certificate of conformity included – each unit is factory-tested.

Why Choose This Phase Sequence Tester Over Others

• Many testers only indicate sequence, but VICTOR 850 also detects open phase and provides three distinct buzzer patterns.
• Competitors may lack the 400Hz frequency support or the higher 600V rating of the 850A model.
• With both visual and audible alerts, this phase sequence tester reduces misinterpretation and speeds up diagnosis.

Final Verdict for Buyers

• If you work with three-phase power daily, a dedicated phase sequence tester is not a luxury – it is a necessity.
• The VICTOR 850 series delivers professional-grade features at a practical price point.
• Choose model 850 for standard 480V systems; choose model 850A for 600V applications and higher withstand voltage.