Comprehensive Introduction to the OMRON 3G3RX2-B4750 Inverter

I. Product Introduction

The OMRON 3G3RX2-B4750 inverter is a high-performance power control device designed by OMRON to meet the complex demands of industrial applications. It integrates advanced frequency conversion technology with intelligent control algorithms to precisely regulate the operating parameters of AC motors, achieving efficient drive and precise control.

 Whether for core equipment in large production lines or special machinery requiring high stability, this inverter ensures stable operation, helping enterprises improve production efficiency and optimize energy utilization.

II. Product Specifications

• Rated Input Voltage: Compatible with a three-phase 400V AC power supply, with a tolerance of ±10% voltage fluctuation, adapting to industrial grid voltage variations.

• Rated Output Current: 140A, providing stable current for high-power motors, meeting the demands of heavy loads and high-intensity operations.

• Applicable Motor Power: 75kW (heavy load) / 90kW (light load), offering efficient collaboration and robust power support.

• Output Frequency Range: 0.1Hz - 590Hz, satisfying both low-speed stable operation and high-speed running requirements.

III. Product Features

• Adaptive Control Technology: Real-time monitoring of motor operation status, automatically adjusting output frequency and voltage to achieve optimal operating efficiency and handle sudden load changes.

• Excellent Dynamic Response Performance: Rapid dynamic response ensures smooth acceleration and deceleration, enhancing passenger experience and production efficiency.

• Integrated Safety Functions: Multiple safety protection features, including the Safe Torque Off (STO) function, ensure the safety of equipment and personnel.

• Flexible Programming and Communication Functions: Supports various programming languages and communication protocols, facilitating personalized programming and device connection, enabling remote monitoring and diagnostics.

IV. Application Scenarios

• Steel and Metallurgy Industry: Precisely controls the operation of large equipment motors such as blast furnace fans and rolling mills, adapting to harsh environments and improving steel quality.

• Petrochemical Industry: Meets complex working condition demands, achieving energy-saving and efficient operation of large oil pumps, preventing electrical faults from causing safety accidents.

• Smart Warehousing and Logistics Systems: Enables high-speed and precise positioning of stacker cranes, and speed matching of conveyor systems, ensuring smooth cargo transportation.

V. Usage Instructions

Installation Preparation

• Choose an appropriate installation location, inspect the equipment's appearance and accessories, and prepare cables, terminal blocks, etc.

Electrical Connection

• Wire according to the electrical wiring diagram, ensuring correct phase sequence and secure connections. Use shielded cables for control signal lines and ensure proper grounding.

Parameter Settings

• Set basic parameters according to the motor's nameplate parameters and set operational mode and other parameters based on the application scenario. Conduct a trial run to observe the motor's status.

VI. Maintenance and Inspection

Daily Maintenance

• Clean dust and debris, maintain unobstructed heat dissipation channels, inspect the operating status, and record operational data.

Regular Inspection

• Check terminal blocks and cables, test electrical performance, and perform in-depth maintenance of internal electronic components and key parts.

Fault Handling

• Use fault code prompts to diagnose the cause of the fault. Handle simple faults independently and contact professional maintenance for complex issues.

VII. Precautions

• Avoid Frequent Start/Stop: Minimize frequent start/stop operations and use soft start/stop control methods to reduce impact.

• Prevent Electromagnetic Interference: Install in a metal shielding box and separate control signal lines from power lines.

• Correct Operation and Maintenance: Operators must undergo professional training and follow operating procedures and maintenance manuals. Non-professionals are prohibited from disassembling or repairing the equipment.

VIII. Related Questions

What is the Rated Power of the 3G3RX2-B4750 Inverter?

• The standard rated power of the 3G3RX2-B4750 inverter is 75kW, with a light load rated power of 90kW, suitable for different load requirements.

What is the Power Voltage Range of the 3G3RX2-B4750 Inverter?

• The power voltage range of the 3G3RX2-B4750 inverter is 3-phase 380-480VAC, ensuring stable operation in different voltage environments.

What Are the Common Fault Codes and Their Meanings for the 3G3RX2-B4750 Inverter?

• Common fault codes include OV (overvoltage), UV (undervoltage), OC (overcurrent), SH (short circuit), EF (overcurrent fault), HW (hardware protection), OL (overload), and ET (overheat), helping to quickly diagnose issues.

What Maintenance and Inspection Precautions Should Be Taken?

• Regularly check the appearance, clean heat sinks and fans, inspect electrical connections, and calibrate parameter settings to ensure long-term stable operation.

What Optional Accessories Are Available for the 3G3RX2-B4750 Inverter?

• Optional accessories for the 3G3RX2-B4750 inverter include braking resistors, AC reactors, DC reactors, noise filters, EtherCAT communication units, and PGs, which can be selected based on application requirements.

How Does the Overload Protection Function Work?

• Automatically reduces frequency or shuts down when the load exceeds limits, protecting the motor and inverter. Specific parameters can be customized.

What Communication Interfaces Are Available?

• The 3G3RX2-B4750 inverter comes with a standard USB Micro-B interface and an optional EtherCAT communication unit, supporting high-speed communication suitable for complex automated systems.

What Are the Installation Environment Requirements for the 3G3RX2-B4750 Inverter?

• It should be installed in a dust-free, non-corrosive gas, and low electromagnetic interference environment. The surrounding temperature should be between -10℃ and 50℃, with humidity between 20% and 90%RH without condensation, ensuring good heat dissipation.

What Control Modes Are Available for the 3G3RX2-B4750 Inverter?

• The 3G3RX2-B4750 inverter offers V/F control and sensorless vector control, suitable for constant speed and high-precision control applications, respectively.

What Frequency Reference Methods Are Available?

• Frequency reference methods include panel settings, external analog signals, and digital signals, supporting manual and automated control.

The OMRON 3G3RX2-B4750 inverter, with its outstanding performance, wide applicability, convenient operation, and stringent safety guarantees, has become a core equipment in the field of industrial automation. 

It not only improves production efficiency and energy utilization but also ensures the safety of equipment and personnel, helping enterprises move towards intelligent and efficient production. It is an indispensable power support in the era of Industry 4.0.