Lenze ESMD752L4TXA 7.5kW Frequency Inverter

Lenze ESMD752L4TXA Frequency Inverter

Product Introduction

The Lenze ESMD752L4TXA belongs to a reliable inverter family. It converts 400V or 480V three-phase power into variable frequency output. Rated power stands at 7.5 kW.

Output current reaches 16.1 A at 400V and 14 A at 480V. Moreover, this drive operates at output frequencies from 0 to 500 Hz. Therefore, it suits both standard pumps and high-speed spindles.

Technical Specifications

Input and output ratings are clearly defined. Supply voltage is 3/PE 400/480 V AC. Input voltage phase imbalance must stay below 2%.

Output frequency range covers 0 to 500 Hz. This flexibility allows precise speed control across many applications.

Current derating applies under certain conditions. Above 40°C ambient, reduce current by 2.5% per degree Celsius up to 55°C maximum. For installation heights above 1000 m, derate current by 5% per additional 1000 m. Maximum height is 4000 m.

Cable Length and Installation

The ESMD752L4TXA supports long motor cables.

• Shielded cable (low-capacitance type): up to 50 meters

• Unshielded cable: up to 100 meters

This feature makes the Lenze ESMD752L4TXA suitable for distributed installations. You can place the inverter in a central cabinet while the motor works far away.

Environmental Limits

Temperature ranges are generous.

• Transport: -25°C to +70°C

• Storage: -20°C to +70°C

• Operation: 0°C to +55°C (with derating above 40°C)

Humidity tolerance reaches 95% non-condensing. Vibration resistance is 0.7 g acceleration.

Enclosure rating equals IP20 per EN 60529. Therefore, install this drive inside a control cabinet. Keep it away from dust, water spray, and conductive debris.

Mechanical Data

Dimensions of the ESMD752L4TXA are 146 mm wide, 197 mm high, and 182 mm deep. Weight is only 3.2 kg.

For shipping, gross weight is 4.0 kg including packaging materials. Its compact size saves valuable panel space.

Installation Guidelines

First, mount the Lenze ESMD752L4TXA vertically on a flat, non-flammable surface inside an IP54 or higher cabinet. Second, ensure at least 100 mm clearance above and below for airflow. Third, connect the 400V mains to L1, L2, L3 terminals.

Furthermore, use low-capacitance shielded cable if you exceed 50 m length. Keep input voltage imbalance below 2% to prevent DC bus ripple. Finally, apply 24 V DC to the control terminals for enable signals.

Packaging List

• 1 x ESMD752L4TXA frequency inverter unit

• 1 x quick reference card

• 1 x terminal cover (pre-installed)

• 4 x mounting screws

No certificate or warranty document is included in the package.

Shipping Methods

We ship via Fedex, UPS, or DHL. Delivery typically takes 3 to 7 business days worldwide.

Frequently Asked Questions (FAQ)

1. Can the ESMD752L4TXA run a 7.5 kW motor at 480V?
Yes. At 480V, the rated output current is 14 A. This is sufficient for most 7.5 kW motors. However, always check the motor nameplate FLA value.

2. What happens if I use a standard shielded cable instead of low-capacitance type?
The Lenze ESMD752L4TXA may experience higher leakage current. The effective cable length limit could drop below 50 m. Use low-capacitance cable for full distance.

3. Is this inverter suitable for hoisting or lifting applications?
It depends. The ESMD752L4TXA does not include a built-in braking chopper in its standard description. For hoisting, add an external braking resistor and verify the DC bus overvoltage control.

4. How do I reduce the output frequency below 1 Hz?
You can set the minimum frequency parameter to 0 Hz. However, torque at very low speeds may be limited. Use sensorless vector control or encoder feedback for better low-speed performance.

5. What is the maximum switching frequency of this Lenze drive?
The datasheet does not specify a maximum. Typically, Lenze 8400 series inverters support 4, 8, and 16 kHz. Higher switching frequencies reduce motor noise but increase derating.