134F2977 Danfoss VLT AutomationDrive FC 360 4.0kW VFD

Product Overview

The 134F2977 (134F2977) is a versatile, high-performance variable frequency drive from the Danfoss VLT® AutomationDrive FC 360 series. Specifically designed for High Overload (H) industrial applications, this 4.0 kW (5.5 hp) unit provides the robust torque and precise motor control required for demanding machinery such as heavy conveyors, mixers, and positioning systems. The 134F2977 is built to excel in challenging environments, featuring Class 3C3 coated PCBs for chemical protection and an integrated Brake Chopper for dynamic deceleration. Its compact IP20 chassis design and support for Loadsharing make it a premier choice for OEMs and panel builders seeking a reliable, high-density solution for 400V three-phase automation systems.

Suffix Breakdown

The model designation FC-360H4K0T4E20H2BXCDXXSXXXXAXBX outlines its specific industrial build:

• FC-360: VLT® AutomationDrive series optimized for performance and cost-efficiency.

• H: High Overload capability (up to 160% torque for 60 seconds).

• 4K0: Rated power output of 4.0 kW (5.5 hp).

• T4: Three-phase input for 380 - 480 VAC mains voltage.

• E20: IP20 / Chassis enclosure rating for panel-mount protection.

• H2: Integrated RFI Filter Class A2 for industrial electromagnetic compatibility.

• B: Integrated Brake Chopper for connecting external braking resistors.

• C: Conformal Coating on all PCBs for enhanced environmental durability.

• D: Loadsharing option for interconnected DC-link power sharing.

• AX: Equipped with the Standard Control Card.

Technical Specifications

Technical FAQs

What are the specific benefits of the High Overload (H) rating for 4.0 kW motors?

The 134F2977 is designed to handle intermittent torque peaks common in high-inertia or high-friction applications. It provides a significant safety margin (160% current for 1 minute) compared to standard normal overload drives, preventing "Overcurrent" trips during heavy startup conditions or sudden mechanical load changes.

How does the Loadsharing (D) option impact cabinet energy management?

The Loadsharing terminals allow multiple drives to share a common DC bus. If one 4.0 kW motor is decelerating and generating energy, that power can be instantly utilized by another drive in the same system that is currently motoring. This reduces total energy consumption and minimizes the heat generated by braking resistors.

Is an external display required for initial commissioning?

This unit is supplied without an LCP (Local Control Panel). Commissioning can be performed via the built-in USB port using the Danfoss MCT 10 software, or by attaching a plug-in LCP 102 (Graphical) or LCP 21 (Numerical) keypad. This allows for cost savings on multi-drive projects where only one keypad is needed for the entire panel.

Engineering & Installation Guide

• Dynamic Braking Setup: To utilize the B-option (Brake Chopper), you must connect an external braking resistor to terminals R+ and R-. Ensure the resistor is rated for the specific duty cycle of your application to dissipate heat effectively away from the drive's cooling intake.

• EMC/RFI Compliance: The integrated H2 Class A2 filter is designed for industrial grids. For optimal noise suppression, use shielded motor cables and ensure a 360-degree ground connection at the drive’s decoupling plate. This protects nearby sensitive signals from electromagnetic interference.

• Airflow and Spacing: Maintain a minimum vertical clearance of 100 mm above and below the 4.1 kg chassis to ensure adequate heat dissipation through the internal cooling fans. The FC 360 series supports side-by-side mounting, enabling extremely high power density within your electrical enclosure.