Schneider ATV320U55N4B Altivar 320 Variable Frequency Drive, 5.5kW 3-Phase 380-500V Compact Industrial VFD

Schneider ATV320U55N4B Altivar 320 5.5kW 3-Phase 380-500V VFD For Medium-Heavy Duty Industrial Motor Variable Speed Regulation

Schneider ATV320U55N4B compact book-type variable frequency drive is a high-performance 5.5kW heavy-duty model in the Altivar 320 series. Equipped with built-in Class C2 EMC filter, certified STO functional safety and dual native fieldbus communication, this VFD delivers robust high-torque output, ultra-wide precision speed regulation and outstanding environmental stability. It is ideal for heavy-duty process pumps, large industrial fans and medium-heavy automated production machinery in standard factory automation scenarios.

Schneider ATV320U55N4B Altivar 320 5.5kW Three-Phase Compact VFD For Medium-Heavy Duty Factory Automation

1. Industrial Structural Design & Superior Environmental Adaptability of Schneider ATV320U55N4B

Space-Saving Book-Style Mounting Structure

Schneider ATV320U55N4B adopts a slim vertical book-shaped casing supporting standard wall-mounted and panel installation, perfectly matching compact control cabinet layouts and OEM machine integration. The streamlined body enables neat side-by-side device arrangement to maximize internal cabinet space utilization. Featuring IP20 enclosure protection grade and UL Type 1 conformity, the unit effectively blocks dust and solid particle intrusion, maintaining stable and reliable internal circuit operation in standard industrial workshop environments.

Wide-Range Temperature & Mechanical Resistance Performance

Schneider ATV320U55N4B ensures full-power continuous operation from -10°C to +50°C without power derating, and supports conditional operational output up to 60°C with proper power adjustment. It withstands 5% to 95% non-condensing humidity and complies with industrial 3C3 and 3S2 environmental classification standards. The reinforced mechanical structure resists routine workshop vibration and instantaneous mechanical shock, enabling long-term unattended continuous operation in complex factory working conditions.

2. 5.5kW Heavy-Duty Electrical Performance & Precision Motor Control of Schneider ATV320U55N4B

Standard Heavy-Duty Electrical Parameters

Schneider ATV320U55N4B features 5.5kW heavy-duty rated motor power (7.5HP) with 14.3A nominal output current and 12.6kVA apparent power at 500V, designed for three-phase asynchronous and synchronous industrial motors. Compatible with 380V to 500V global industrial power grids, the drive tolerates -15% to +10% grid voltage fluctuation and supports 50/60Hz standard power frequency operation. It delivers 20.7A maximum input current at 380V and 14.5A at 500V, with stable voltage and current output eliminating motor speed deviation under variable medium-heavy load conditions and ensuring consistent mechanical operational efficiency.

High-Torque Regulation & Intelligent Energy-Saving Operation

Schneider ATV320U55N4B delivers excellent transient overtorque capacity to handle instantaneous heavy startup loads and sudden load fluctuations for medium-heavy industrial equipment. It supports ultra-wide 0.1Hz to 599Hz frequency adjustment, covering full-range working scenarios from low-speed constant-torque transmission to high-speed precision operation. The unit features 4kHz nominal switching frequency with an adjustable 2kHz to 16kHz range, effectively suppressing motor electromagnetic noise and mechanical resonance. Dedicated fan and pump energy-saving algorithms reduce power consumption by up to 30% during continuous cyclic operation, significantly lowering long-term operational costs.

3. Certified Safety System & Multi-Protocol Networking of Schneider ATV320U55N4B

Built-In Functional Safety & Industrial-Grade Protection

Schneider ATV320U55N4B integrates factory-certified Safe Torque Off (STO) safety function compliant with international machinery safety standards, eliminating external safety relay reliance and simplifying system wiring layout. Comprehensive multi-layer protection mechanisms cover input phase loss, motor short circuit, ground fault, overload, overvoltage, undervoltage and internal overheating. Real-time fault monitoring and automatic power cutoff mechanisms provide full-coverage hardware protection for both the drive and connected motors, ensuring safe and stable long-term continuous operation.

Dual Fieldbus Communication & Versatile High-Precision I/O Configuration

Schneider ATV320U55N4B comes with native Modbus RTU and CANopen dual fieldbus protocols for seamless integration with industrial PLC and HMI systems, supporting real-time operational data monitoring, remote parameter tuning and fault log retrieval. Optional expansion cards extend compatibility with mainstream industrial networks including PROFINET, EtherNet/IP and Profibus. Equipped with 7 multi-function discrete inputs including dedicated STO interface, 3 relay outputs and 3-channel 10-bit high-precision analog terminals, it supports 0-10V voltage, ±10V differential voltage and 4-20mA current signal access, meeting complex interlock control and high-precision data acquisition requirements for medium-heavy duty automated machinery.