Product Description: SEW 31C300-503-4-07 Inverter

Model: 31C300-503-4-07

Brand: SEW SAEW

Series: MOVITRAC 31C

Rated Power: 30 kW

Input: Three-phase 380~500V, 50/60Hz

Rated Output Current: 72 A

Version Code: 07 (Professional Customized Enhanced Version)

I. Product Overview

31C300-503-4-07 is a 30kW industry-customized enhanced version of the SEW 31C series vector inverter. The electrical specifications are the same as the standard version 31C300-503-4-00, but 07 indicates that it is pre-installed with advanced hardware, dedicated firmware, and function optimization, specifically designed for heavy-duty applications with high dynamic, high safety, and high EMC requirements.

II. Core Parameters (Same as Standard Version)

Control Mode: V/F + Sensorless Vector Control (VFC)

Overload Capacity: 150% Rated Current, 60s

Output Frequency: 0–400 Hz

Carrier Frequency: Maximum 16 kHz

Braking Function: Built-in Braking Chopper (4-Quadrant Operation)

Standard Communication: RS485 Modbus RTU

Protection Grade: IP20

Environmental Temperature: 0°C ~ +45°C (No Capacity Reduction)

Applicable Motors: Three-phase Asynchronous Motors, 30kW

III. Core Differences of Version 07 (Key Differences)

1. Hardware Customization

Factory-integrated advanced accessory modules (encoder interface, safety function STO, dedicated communication card)

Built-in EMC Filter + Output Reactor, meeting strict electromagnetic compatibility standards

Enhanced heavy-load heat dissipation, suitable for continuous full-load, high-temperature environments

2. Firmware and Functions

搭载 dedicated control programs (lifting， synchronization， tension control， etc. for specific industries)

Parameters pre-optimized for target applications， reducing on-site debugging

Enhanced protection logic and dynamic response， suitable for frequent starts and precise positioning

3. Application Positioning

07 Version： Specialized for professional applications (lifting， hoisting， precise synchronization， high EMC requirements)

00 Version： General standard type， suitable for conventional fans， pumps， conveyors

IV. Main Functional Characteristics

Sensorless Vector Control， 0.5Hz Output 150% Torque， Smooth Startup

Built-in PID， supports constant voltage / constant current / constant temperature closed-loop control

16 Segment Multi-speed， 3 Group Frequency Switching， Avoiding Mechanical Resonance

Comprehensive Protection： Overcurrent， Overvoltage， Undervoltage， Short Circuit， Overload， Ground Fault

Support Parameter Copy， Bus Expansion (PROFIBUS， CANopen， etc.)

V. Typical Applications

Lifting and hoisting machinery (cranes， winches， hoists， etc.， preferred for 07 version)

Heavy-duty conveying， precision machinery， printing and packaging， metallurgical rolling mills

Industrial scenarios with high requirements for synchronization， EMC， safety， and stability

VI. Version Comparison (07 vs 00)

31C300-503-4-00： General Standard Version， Basic Configuration， High Cost Performance

31C300-503-4-07： Customized Enhanced Version， Hardware/Firmware Pre-Optimized， Ready for Use in Professional Applications

VII. Product Advantages

SEW Original Quality， Reliable Heavy-Duty， Long Lifespan

07 Version Reduces Selection / Debugging， Reduces On-Site Fault Risk

High Vector Control Accuracy， Stable Speed Regulation， Significant Energy Saving

Rich Interfaces， Compatible with Mainstream PLC/HMI， Easy Maintenance