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Datasheet summary

FC 301

Engineering summary from PDF text extraction for FC 301. Verify every value with the OEM datasheet.

Summary

Product Identification

  • Product Line: VLT® AutomationDrive FC 301/302
  • Power Range: 0.25-75 kW
  • Document Title: Design Guide
  • Document Revision: MG33BF02 - Rev. 2013-12-20

Introduction

This Design Guide provides information for integrating the frequency converter into various applications. It covers basic operating principles, product features, system integration, product specifications, installation, and application examples.

Safety

  • WARNING: Contains high voltage components. Only qualified personnel should install, operate, and maintain the equipment. Always disconnect mains power and wait for capacitor discharge before servicing.
  • WARNING: Risk of unintended motor start when connected to mains. Disconnect power when personal safety requires it.
  • WARNING: Leakage currents can exceed 3.5 mA. Ensure proper grounding to prevent serious injury.
  • CAUTION: Unintended rotation of permanent magnet motors can cause injury. Block motors to prevent unintended rotation.
  • CAUTION: Risk of injury if internal covers are not properly secured before applying power.

Qualified Personnel

Qualified personnel are trained and authorized to install, commission, and maintain equipment according to pertinent laws and regulations, and are familiar with the safety measures in this document.

Safety Symbols

  • WARNING: Potentially hazardous situation, could result in death or serious injury.
  • CAUTION: Potentially hazardous situation, could result in minor or moderate injury or alert against unsafe practices.
  • NOTICE: Important information, including situations that may result in equipment or property damage.

Discharge Time

The DC-link capacitors can remain charged after power is removed. Minimum waiting times are specified based on voltage and power rating before servicing.

  • 200-240 V (0.25-3.7 kW): 4 minutes
  • 200-240 V (5.5-37 kW): 7 minutes
  • 380-500 V (0.25-7.5 kW): 15 minutes
  • 380-500 V (11-75 kW): 20 minutes
  • 525-600 V (0.75-7.5 kW): 15 minutes
  • 525-600 V (11-75 kW): 20 minutes
  • 525-690 V (1.5-7.5 kW): 15 minutes
  • 525-690 V (11-75 kW): 20 minutes

Basic Operating Principles

The frequency converter supplies a standard 3-phase induction motor with variable frequency and voltage to control motor speed. It comprises four main modules: Rectifier, Intermediate circuit, Inverter, and Control and regulation.

Sequence of Operation

  • Rectifier Section: AC power enters through input terminals (L1, L2, L3).
  • Intermediate Section: Rectified voltage is smoothed by a sinewave filter (DC bus inductor and capacitor bank).
  • Inverter Section: IGBTs switch to create an output waveform using the Danfoss VVC+ PWM principle for optimal motor performance.
  • Brake Option: For units with a dynamic brake option, a brake IGBT and external brake resistor limit the intermediate circuit voltage by absorbing regenerative energy.
  • Load Sharing: Units with this option can tie DC bus circuits of multiple converters together to share excess voltage, potentially reducing the need for external brake resistors and saving energy. This configuration requires specific considerations and consultation with Danfoss application engineering.

Control Interface

Control inputs can be received from:

  • Local Control Panel (hand mode)
  • Programmable analog, digital, and analog/digital control terminals (auto mode)
  • RS-485, USB, or serial communication ports (auto mode)

Controls

The frequency converter can control motor speed or torque.

Control Principles

  • Speed Control:
    • Open Loop: No motor feedback required (sensorless).
    • Closed Loop PID: Requires speed feedback to an input for higher accuracy.
  • Torque Control: Used in applications where torque controls the process (e.g., tension control). Can be selected in VVC+ (open loop) or Flux control (closed loop with motor speed feedback). Requires correct motor data for optimal performance.

FC 301 vs. FC 302 Control Principle

  • FC 301: General purpose frequency converter using Voltage Vector Control (VVC+). Handles asynchronous and PM motors. Current sensing is based on DC-link or motor phase current.
  • FC 302: High-performance frequency converter supporting various motor control principles (U/f, VVC+, Flux Vector). Handles Permanent Magnet Synchronous Motors and squirrel cage asynchronous motors. Features 3 current transducers in motor phases.

Control Structure in VVC+

The control structure diagram illustrates open loop and closed loop configurations for speed and process control using VVC+. Parameters for speed PID control are in group 7-0* and for process PID control in groups 7-2* and 7-3*.

Control Structure in Flux Sensorless (FC 302 only)

This structure is for FC 302 and uses Flux Sensorless control. It includes an estimated speed feedback for Speed PID control.

Control Structure in Flux with Motor Feedback (FC 302 only)

This configuration (FC 302 only) utilizes motor feedback (encoder or resolver) for precise control. It supports speed closed loop, torque control, and process PID control.

PID Control

  • Speed PID Control: Maintains constant motor speed despite load changes. Different control configurations are available depending on the 1-00 Configuration Mode and 1-01 Motor Control Principle settings. Tuning PID parameters is recommended for optimal performance, especially with Flux motor control principles.

System Integration

Ambient Operating Conditions

  • Humidity: Not specified.
  • Temperature: Not specified.
  • Temperature and Cooling: Not specified.
  • Manual Derating: Discusses derating for low speed and low air pressure.
  • Acoustic Noise: Not specified.
  • Vibration and Shock: Not specified.
  • Aggressive Atmospheres: Discusses gases, dust exposure, and potentially explosive atmospheres.
  • Maintenance: Not specified.
  • Storage: Not specified.

EMC Compliance

The product is designed to meet EMC Directive requirements.

  • EMC Test Results: Not specified.
  • Emission Requirements: Not specified.
  • Immunity Requirements: Not specified.
  • Motor Insulation: Not specified.
  • Motor Bearing Currents: Not specified.

Mains Supply Interference/Harmonics

Discusses the effects of harmonics, harmonic limitation standards, mitigation, and calculation.

Galvanic Isolation (PELV)

  • PELV - Protective Extra Low Voltage: Not specified.

Brake Functions

  • Selection of Brake Resistor: Not specified.

Product Specifications

Electrical Data

  • Mains Supply 200-240 V: See page 58 for details.
  • Mains Supply 380-500 V: See page 60 for details.
  • Mains Supply 525-600 V (FC 302 only): See page 63 for details.
  • Mains Supply 525-690 V (FC 302 only): See page 66 for details.

General Specifications

  • Mains Supply: Not specified.
  • Motor Output and Motor Data: Not specified.
  • Ambient Conditions: Not specified.
  • Cable Specifications: Not specified.
  • Control Input/Output and Control Data: Not specified.
  • Derating for Ambient Temperature: Details provided for Enclosure Types A, B, and C on pages 73-76.
  • Measured Values for dU/dt Testing: See page 78.
  • Efficiency: See page 81.
  • Acoustic Noise: See page 81.

How to Order

Drive Configurator

  • Type Code: See page 82.
  • Language: See page 84.

Ordering Numbers

  • Options and Accessories: See page 85.
  • Spare Parts: See page 87.
  • Accessory Bags: See page 87.
  • VLT AutomationDrive FC 301: See page 88.
  • Brake Resistors for FC 302: See page 92.
  • Other Flat Pack Brake Resistors: See page 99.
  • Harmonic Filters: See page 101.
  • Sine-Wave Filters: See page 103.
  • dU/dt Filters: See page 105.

Mechanical Installation

Safety

Refer to page 107.

Mechanical Dimensions

  • Mechanical Mounting: See page 110.
    • Clearance: See page 110.
    • Wall Mounting: See page 110.

Electrical Installation

Safety

Refer to page 112.

Cables

  • Tightening Torque: See page 113.
  • Entry Holes: See page 114.
  • Tightening of the Cover after Connections are Made: See page 118.

Mains Connection

  • Fuses and Circuit Breakers: Information on fuses and recommendations for CE and UL compliance provided on pages 122-126.

Motor Connection

Refer to page 132.

Earth Leakage Current Protection

Refer to page 134.

Additional Connections

  • Relay: See page 136.
  • Disconnectors and Contactors: See page 138.
  • Load Sharing: See page 138.
  • Brake Resistor: See page 138.
  • PC Software: MCT 10, MCT 31, and Harmonic Calculation Software (HCS) are described on page 139.

Additional Motor Information

  • Motor Cable: See page 140.
  • Connection of Multiple Motors: See page 140.

Safety

  • High Voltage Test: See page 142.
  • EMC Grounding: See page 142.
  • ADN-compliant Installation: See page 142.

Application Examples

  • Commonly Used Applications: See page 144.
  • Closed Loop Drive System: See page 149.
  • Programming of Torque Limit and Stop: See page 149.
  • Programming of Speed Control: See page 150.

Options and Accessories

Communication Options

Refer to page 152.

I/O, Feed-back and Safety Options

  • VLT® General Purpose I/O Module MCB 101
  • VLT® Encoder Option MCB 102
  • VLT® Resolver Option MCB 103
  • VLT® Relay Card MCB 105
  • VLT® Safe PLC Interface Option MCB 108
  • VLT® PTC Thermistor Card MCB 112
  • VLT® Extended Relay Card MCB 113
  • VLT® Sensor Input Option MCB 114
  • VLT® Safe Option MCB 15x
  • VLT® C Option Adapter MCF 106

Motion Control Options

Refer to page 168.

Accessories

  • Brake Resistors
  • Sine-wave Filters
  • dU/dt Filters
  • Common Mode Filters
  • Harmonic Filters
  • IP21/Type 1 Enclosure Kit
  • Remote Mounting Kit for LCP
  • Mounting Bracket for Enclosure Types A5, B1, B2, C1 and C2

RS-485 Installation and Set-up

Installation and Set-up

  • Overview: See page 176.
  • Network Connection: See page 177.
  • Bus Termination: See page 177.
  • RS-485 Installation and Set-up: See page 177.
  • FC Protocol Overview: See page 177.
  • Network Configuration: See page 178.
  • FC Protocol Message Framing Structure: Details on telegram structure, address, data control, data field, PKE, parameter number, index, parameter value, and supported data types are provided on pages 178-181.
  • Examples: Writing and reading parameter values are demonstrated on pages 181-182.

Modbus RTU Overview

  • Assumptions and User Knowledge: See page 182.
  • Modbus RTU Overview: See page 182.
  • Frequency Converter with Modbus RTU: See page 183.
  • Network Configuration: See page 183.
  • Modbus RTU Message Framing Structure: Details on message structure, start/stop field, address, function field, data field, CRC check field, coil register addressing, and function codes are provided on pages 183-186.
  • How to Access Parameters: Parameter handling, storage, IND, text blocks, conversion factors, and parameter values are described on pages 186-187.
  • Danfoss FC Control Profile: Control and Status words according to FC Profile and PROFIdrive Profile, and bus speed reference value are detailed on pages 187-192.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror

Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.