Variateur de fréquence AC Lenze EVF8212-E série 8200 0,75 kW

Product Overview

The EVF8212-E (EVF8212-E) is a high-reliability AC inverter drive from the industry-proven Lenze 8200 series, specifically designed for the precise control of three-phase asynchronous motors up to 0.75 kW. Operating with a 400V input, this drive provides a stabilized 3x400V output at 2.4A, making it a critical component for small-scale industrial automation tasks such as automated labeling, precision feeding, and light-duty pumping systems. The EVF8212-E is engineered to optimize motor performance while significantly reducing energy consumption through advanced frequency regulation. Its robust German-engineered hardware ensures thermal stability and high immunity to electrical noise, which is essential for maintaining consistent production cycles in textile, food processing, and packaging environments. Although currently in its phase-out stage, its proven track record for longevity makes it the preferred direct-replacement solution for facility managers seeking to maintain legacy systems without the complexity of a complete control cabinet redesign.

Technical Configuration

The EVF8212-E architecture is centered on a high-performance power stage designed for a 3-phase 400V supply. It utilizes advanced pulse-width modulation (PWM) to provide smooth torque delivery across the entire speed range. The unit features a modular interface slot, allowing for the quick addition of communication modules (e.g., LECOM, PROFIBUS) or local keypad units for manual parameterization. Its internal safety logic includes a comprehensive suite of protection features, including I2t motor monitoring, earth fault detection, and overvoltage protection. Housed in a durable 2.70 kg chassis, the drive is optimized for vertical mounting to maximize convection cooling. The "E" designation signifies integrated interference suppression measures, ensuring that the drive complies with stringent industrial EMC standards and does not disrupt sensitive digital logic signals within the automation network.

Technical Specifications

Technical FAQs

Can the EVF8212-E be used for high-starting torque applications?

Yes. While rated at 0.75 kW, the 8200 series supports an overload capacity of 1.5 times the rated current for up to 60 seconds. For high-friction starts, adjust the voltage boost parameters via the interface module to ensure sufficient breakaway torque.

What is the recommended method for parameter backup on this drive?

The most efficient method is using the E82ZBC keypad module or the Lenze "Global Drive Control" (GDC) software via a PC adapter. This allows you to clone the parameter set from an existing EVF8212-E and upload it to a new unit in minutes.

How does the integrated interference suppression benefit my installation?

The integrated RFI filters reduce high-frequency emissions back into the power grid. This prevents the inverter from causing erratic behavior in nearby sensors, encoders, or PLC I/O modules, which is common in compact control cabinets.

Engineering & Installation Guide

• Thermal Management and Clearances: To ensure optimal service life of the internal DC-bus capacitors, the EVF8212-E must be mounted vertically. Maintain a minimum clearance of 100 mm above and below the drive. For installations where ambient temperatures exceed 40 Celsius, forced-air ventilation in the cabinet is mandatory to prevent thermal derating of the 2.4A output.

• EMC-Compliant Wiring: Always use shielded motor cables for the U/V/W terminals. The shield must be connected to the PE rail using a large-surface contact (shield clamp) directly at the drive’s output. This is vital for maintaining the effectiveness of the "E" version's integrated suppression measures.

• Grounding and Safety: High leakage currents (exceeding 3.5 mA) are present due to internal RFI filters. Ensure a permanent, high-integrity protective earth (PE) connection. Before performing maintenance, wait at least 5 minutes after power-off to allow the DC bus to discharge below 50 VDC.