EVF9325-EV Lenze 9300-Series Vector Frequency Inverter 5.5 kW

Product Overview

The EVF9325-EV (EVF9325EV) is a high-performance 9300-series vector frequency inverter engineered by Lenze for precise speed and torque regulation of three-phase AC motors. Rated at 5.5 kW (7.5 HP), this drive is optimized for a 400 / 480 V mains connection and is a critical component for demanding industrial applications such as heavy-duty conveyors, extrusion lines, and centrifugal fans. This specific "EV" variant is designed without internal interference suppression measures, making it the preferred choice for systems utilizing centralized line filters or operating within specific grounding architectures where internal capacitive leakage must be minimized. Weighing 7.50 kg and featuring a robust German-engineered housing, the EVF9325-EV ensures maximum uptime and dynamic motor performance in complex B2B automation environments. Even as it enters the phase-out stage, it remains a vital solution for maintaining the efficiency and reliability of established manufacturing infrastructures.

Technical Configuration

The EVF9325-EV utilizes Lenze’s advanced field-oriented control (FOC) technology to provide near-servo dynamics from standard induction motors. Its modular internal architecture allows for high-speed digital processing of motion profiles, supporting features like S-ramp acceleration, DC injection braking, and torque limiting. Without integrated RFI/EMI suppression, the unit features a simplified power stage that prevents common-mode noise issues in large-scale decentralized installations. It is equipped with a versatile function slot that supports plug-in communication modules (PROFIBUS, CANopen, INTERBUS) and feedback interfaces for encoders or resolvers, enabling it to function as an intelligent node within a networked control system. The hardware includes comprehensive monitoring for short circuits, phase loss, and I2t motor protection.

Technical Specifications

Technical FAQs

Why does the EVF9325-EV come without internal interference suppression?

The EV variant is designed for installations where external mains filters are already present or for use in IT (ungrounded) power systems. By removing internal capacitors to ground, this drive avoids nuisance tripping of sensitive residual current devices (RCDs) and allows for a customized EMI suppression strategy.

How do I handle high-inertia loads with the 5.5 kW model?

For loads requiring rapid deceleration, the EVF9325-EV features an integrated brake chopper. You must connect an external braking resistor to terminals +UG and BR to dissipate regenerative energy as heat, preventing 'OU' (Overvoltage) faults.

Is it possible to back up the parameters of this drive for future replacement?

Yes. You can use the XT keypad (EMZ9371BC) to copy the parameter set or utilize a PC with Lenze Global Drive Control (GDC) software via a LECOM-B (RS485) or CAN interface module to save a digital backup.

Engineering & Installation Guide

• External Filter Requirements: To comply with CE or UL EMC directives, an external mains filter must be installed in series with the EVF9325-EV. Failure to do so may result in electromagnetic interference affecting nearby sensors, PLCs, and communication lines.

• Thermal Clearance: Due to the 5.5 kW power stage, this unit requires active airflow. Mount the inverter vertically on a non-flammable surface. Maintain a minimum of 100 mm vertical clearance above and below the unit. Side-by-side mounting is possible, but ensure cabinet ambient temperatures do not exceed 45 deg C to maintain full output current.

• DC Bus Safety Protocols: The internal capacitors hold a lethal charge (approx. 560–680 VDC). After disconnecting the mains, wait at least 10 minutes for the DC bus to discharge. Always use a multimeter to verify the voltage across +UG and -UG is below 50 VDC before attempting any wiring or maintenance.