Danfoss 136U9617 Frequency Converter VLT Micro Drive FC 051

Product Overview

The Danfoss 136U9617 (FC-051P1K5T4S20HXXXCXXXSXXX) is a high-performance, compact variable frequency drive tailored for efficient motor speed regulation in small-scale industrial applications. As a member of the VLT Micro Drive FC 051 series, this 1.5 kW / 2.0 HP unit is engineered to provide reliable control for localized fans, small pumps, and conveyor systems. By ensuring precise motor acceleration and deceleration, this drive reduces mechanical strain on components and significantly optimizes energy usage, serving as a cost-effective solution for improving the operational efficiency of automated machinery.

Technical Configuration

This micro drive is designed for three-phase power systems operating in the 380-480 VAC range. It features a space-optimized IP20-rated enclosure, ideal for mounting within crowded electrical cabinets where chassis space is limited. The internal circuitry includes factory-applied conformal coating on all printed circuit boards (PCBs), providing superior protection against humidity and corrosive atmospheres, ensuring long-term stability in typical industrial environments. Note that this specific configuration (136U9617) is supplied without an internal RFI filter or brake chopper, making it an ideal, streamlined choice for applications where these features are not required or are managed externally.

Technical Specifications

FAQs

Why would I choose a drive without an RFI filter?

Choosing a model without an integrated RFI filter is ideal for installations where the drive is located in a dedicated, shielded environment or where external filtering is already provided at the main distribution level, allowing for a more cost-effective hardware selection.

Does this unit include a local control panel (LCP)?

No, this unit is supplied without an integrated LCP. If local parameter adjustments, manual speed control, or status monitoring are required at the drive location, a compatible Danfoss LCP must be purchased separately.

How does the conformal coating affect the drive's reliability?

The conformal coating on the PCBs significantly enhances reliability by sealing sensitive electronic components from dust, moisture, and chemical vapors. This prevents conductive tracking and corrosion, which are leading causes of electronic failure in industrial settings.

Can this drive be used for high-inertia start/stop applications?

Since this model does not include an integrated brake chopper, it is best suited for applications with low-to-moderate inertia where rapid deceleration is not required. For high-dynamic loads, an external braking solution or a different model with a built-in chopper is recommended.

Installation Guidelines and Maintenance

• Airflow and Cooling: Despite its small footprint, ensure that the drive has sufficient clearance to maintain convective cooling. Keep at least 100 mm of space above and below the chassis, and ensure the control cabinet is adequately ventilated to maintain the internal ambient temperature within the drive’s operating limits.
• Grounding Requirements: To maintain safety and prevent electrical noise, connect the drive chassis to the main equipment grounding bar using a low-impedance cable. Ensure all signal cabling is routed separately from the power input and motor output cables to avoid inductive interference.
• Terminal Inspection: Given the compact nature of the terminals, ensure that all mains and motor connections are tightened to the specified torque. Periodic checks, especially during the first months of operation, are recommended to prevent loose connections from causing localized heating.