SEW 31C007-503-4-20 Part 8264465 MOVITRAC 31C Frequency Inverter

Product Overview: SEW-Eurodrive 31C007-503-4-20 Frequency Inverter

The SEW-Eurodrive 31C007-503-4-20 (Part No. 8264465) belongs to the industrial MOVITRAC® 31C drive series. This microprocessor-controlled frequency inverter regulates speed for three-phase asynchronous AC motors using sinusoidal pulse-width modulation. Engineers deploy this Size 0 compact unit in automated conveyors, material handling, and commercial drive systems. It operates on a 3 × 380–500 V AC supply and delivers a 0.75 kW rated output. Built-in 4-quadrant operation with an integrated brake chopper ensures dynamic deceleration control across industrial loads.

Technical Specifications

Installation Guidelines

• Vertical Orientation: Mount the 31C007-503-4-20 strictly vertically inside the control cabinet.
• Thermal Clearance: Leave at least 100 mm (4 in) of unobstructed ventilation space above and below the unit.
• Side-by-Side Spacing: Zero lateral clearance is required between adjacent MOVITRAC® 31C inverters.
• Terminal Tightening Torque: Tighten Size 0 power terminals to exactly 1.5 Nm (13.3 lb.in) using copper conductors.
• Cable Separation: Route shielded control leads separately from three-phase power cables to prevent electromagnetic coupling.
• Grounding Systems: Connect only to TN or TT power grids with a directly earthed neutral point.

Commissioning & Maintenance Convenience

• Structured Menu Navigation: Configure parameters quickly through the simplified user menu or full parameter tree.
• Automatic Motor Sizing: Built-in auto-tuning adapts current limits to prevent motor stalling above base frequency.
• PC & Keypad Setup: Connect an FBG 31C keypad or USS21A RS-232/RS-485 interface for fast parameter cloning.
• Capacitor Discharge Safety: Wait at least 10 minutes after disconnecting mains power before servicing internal terminals.

System Compatibility

• Supported Motors: Drives standard three-phase squirrel-cage asynchronous induction motors and SEW geared motors.
• Load Restrictions: Connect only resistive-inductive motor loads; never connect capacitive loads to the output.
• External Supply: Use a current-limited 24 V DC external source (max 30 V DC, ≤ 8 A) for control circuits.
• Size 0 Architecture: As a compact Size 0 model, this unit operates as a standalone drive without internal option card slots.

Certifications & Compliance

• CE Marking: Meets European Low Voltage Directive 73/23/EEC safety standards.
• EMC Directive: Satisfies 89/336/EEC requirements when installed with recommended NF line filters and shielded cables.
• UL Installation Standard: Supports UL-compliant panel builds using 60/75 °C rated copper wiring and specified fuses.

Package Contents

• 1 × SEW-Eurodrive 31C007-503-4-20 Frequency Inverter (Part No. 8264465)
• Factory terminal block connectors and protective housing cover
• Technical nameplate documentation

Selection Guide for Engineers

• Verify Voltage Class: Confirm your facility provides a three-phase 380–500 V AC supply (indicated by the -503 suffix).
• Match Motor Current: Ensure your motor's full-load current does not exceed the inverter's 1.9 A continuous output rating.
• Check Braking Demands: Choose this -4 (4-quadrant) model when your application requires dynamic braking via an external braking resistor.
• Evaluate Expansion Needs: Select a Size 1 or larger MOVITRAC® 31C unit if your system requires plug-in fieldbus or encoder cards.

Frequently Asked Questions (FAQ)

Q1: What does the model code 31C007-503-4-20 signify?

A1: 31C denotes the series, 007 indicates 0.75 kW power, 503 specifies 380–500 V three-phase input, and 4 confirms 4-quadrant braking.

Q2: Can I install a Profibus or I/O expansion card inside this drive?

A2: No, Size 0 models (31C005 through 31C014) do not accept internal plug-in option boards.

Q3: How do I prevent nuisance tripping when switching multiple drives on one contactor?

A3: Install a three-phase line choke in series when connecting more than four units to a single mains contactor.

Q4: What is the minimum waiting time before re-energizing the mains contactor?

A4: Observe a minimum switch-off interval of 10 seconds for mains contactor K11 to protect the internal charging circuit.

Q5: How should I ground the shielded control cables to avoid ground loops?

A5: Ground both ends over a wide surface area, or connect one end through a 220 nF / 50 V suppression capacitor.

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