18F5A1G-340F KEB Combivert F5 Inverter 22kW Drive

Engineering Overview

The KEB 18F5A1G-340F represents a heavy-duty industrial variable frequency drive belonging to the high-performance Combivert F5 Series inverter line. Built into a compact size G housing frame, this 22 kW (30 HP) power stage handles demanding continuous torque applications while providing high-dynamic velocity and position control for 3-phase induction and synchronous motors.

Engineered for high power density, the unit features an internal GTR7 dynamic braking chopper alongside an air-cooled surface-mount heat sink system. The 18F5A1G-340F operates smoothly across wide 400V supply networks, rendering it a flexible core control drive for heavy automated machinery.

Part Number Configuration Tree

• Frame & Power Class: 18F5
  • Definition: Size 18 drive rating engineered for 35 kVA apparent power and 22 kW shaft power output.
• Control Board Level: A1
  • Definition: Multi-Function control platform with advanced software features and high-speed execution algorithms.
• Hardware Cooling & Braking: G
  • Definition: Air cooler heat sink construction integrated with a factory GTR7 braking transistor module.
• Mains Voltage Rating: 3
  • Definition: 3-phase 400V AC nominal input class (operational tolerance from 305V AC to 528V AC).
• Housing & Revision Code: 40F
  • Definition: Size G chassis cabinet footprint with standard terminal board interface layout.

Technical Specifications

Industrial Application Suitability

The 18F5A1G-340F motor inverter matches demanding process industrial machinery:

• Heavy industrial extruders and plastic injection molding machinery demanding high start-up torque.
• Large-capacity centrifugal water pumps, blowers, and HVAC air handling fans.
• High-speed industrial crushers, mixers, and heavy material handling belt conveyors.
• Metal processing rolling mills and automated wire drawing machinery.

Advanced Fault Diagnostic Architecture

Plant technicians can leverage onboard protection mechanisms in the Combivert F5 Series for system diagnostics:

• Continuous monitoring of motor thermal conditions via PTC sensor feedback channels.
• Phase failure detection algorithms covering input line imbalances and motor output open circuits.
• Active overvoltage suppressors and instantaneous peak current limiting circuits to shield power IGBT modules.
• Diagnostic fault memory logs storing operational status codes prior to safety shutdown trips.

Global PLC Spare HUB Insight

On a recent commissioning job at a rubber manufacturing plant, an engineering team struggled with continuous overvoltage trips on an old 22 kW internal mixer during heavy deceleration cycles. The original drive lacked adequate regenerative handling. We supplied the KEB 18F5A1G-340F module, taking advantage of its built-in GTR7 braking chopper. By coupling an external heavy-duty braking resistor and tuning the internal DC-braking torque parameters, we completely eliminated DC bus voltage spikes during load drops, cutting batch cycle times by 18%.

Global Logistics and Warranty Terms

All industrial drive assets are delivered under verified commercial terms:

• 12-Month Coverage: Backed by a full 12-month factory warranty valid from the date of physical arrival.
• 24-48 Hour Dispatch: In-stock drives undergo quality testing and dispatch within 24 to 48 hours.
• Express Couriers: Shipped worldwide via express logistics networks: FedEx, UPS, and DHL.

Selection and Mounting Procurement Guide

Review these critical site conditions before finalizing purchase of the 18F5A1G-340F:

• Current Sizing: Verify that the full load current rating of your target 22 kW motor does not exceed 50 A continuous.
• Cabinet Ventilation: Maintain 100 mm top and bottom clearance inside the panel to ensure proper heat sink air flow across the 170 mm wide G housing.
• Chopper Resistor Matching: Verify the minimum resistance limits of the external braking resistor before wiring to the GTR7 chopper output terminals.

Frequently Asked Questions

Question 1: What thermal advantages does the Size G housing offer on the 18F5A1G-340F inverter?

The Size G chassis utilizes a deep-fin forced air heat sink design that optimizes thermal dissipation at high 50 A continuous loads, enabling a slim 170 mm width footprint in tight electrical panels.

Question 2: Why is the default PWM switching frequency on this 22 kW unit set to 2 kHz instead of higher rates?

Setting higher power drives to 2 kHz reduces thermal stress on the internal power IGBTs during heavy current draw, maintaining operational stability in high ambient temperature panels without derating continuous output current.

Question 3: Can this frequency inverter run in external DC bus sharing configurations?

Yes. The drive terminals support direct DC link connection, allowing multiple drives to share energy across a common DC bus to maximize efficiency during regenerative braking phases.

Question 4: What is the benefit of the integrated GTR7 brake transistor over separate external chopper units?

The built-in GTR7 transistor eliminates the need for separate external chopper modules, saving cabinet panel space and simplifying field wiring directly to external dynamic braking resistors.

Question 5: How does the drive handle wide supply voltage fluctuations in remote regional industrial plants?

The input stage features a broad operational window from 305 V AC up to 528 V AC, enabling stable output voltage regulation even during severe line sag or surge conditions.

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