Model Code Definition

• 31B: Series (MOVITRAC 31B, compact regenerative type)

• 055: Rated current 12.5 A (≈ 5.5 kW at 400 V)

• 503: 3‑phase 380–500 V AC input, no integrated EMC filter

• 4: 4‑quadrant operation (regenerative braking, energy feedback to grid)

• 00: Standard firmware, no fieldbus, no STO safety

Technical Specifications

Input

• Rated voltage: 3‑phase AC 380–500 V

• Frequency: 50 / 60 Hz (±5%)

• Rated current: 11.5 A (at 400 V)

Output

• Rated power: 5.5 kWSEW-EURODRIVE

• Rated current: 12.5 A (at 400 V)

• Apparent power: 8.3 kVA

• Frequency range: 0–150 Hz (VFC) / 0–600 Hz (V/f)

• Overload: 125% continuous; 150% for 60 sSEW-EURODRIVE

Control & Interfaces

• Control modes: V/F open‑loop, sensorless vector control (VFC)

• Digital I/O: 6 inputs / 2 outputs / 1 relay

• Analog I/O: 2 inputs / 2 outputs

• Protection: Overcurrent, overvoltage, undervoltage, overtemperature, earth fault, short circuit

Mechanical & Environmental

• Protection class: IP20

• Ambient temp: 0 °C to +45 °C (derate >40 °C)

• Storage temp: -25 °C to +70 °C

• Dimensions (W×H×D): approx. 200 × 310 × 220 mm

• Weight: approx. 6.2 kg

Key Features

1. 5.5 kW regenerative performance

   Full 4‑quadrant operation; recycles braking energy to the grid, eliminating external brake resistors and lowering energy costs.
2. Compact & robust design

   Space‑saving book‑style design; IP20 enclosure and comprehensive protections ensure reliability in standard industrial environments.
3. High‑efficiency control

   Sensorless vector control delivers smooth torque across the speed range, ideal for fans, pumps, and conveyors needing stable speed regulation.
4. Flexible expansion

   Add external EMC filter for Class C2 compliance; optional fieldbus modules (PROFINET, EtherNet/IP) enable networked automation systems.

Typical Applications

• Medium‑sized conveyors, belt feeders

• Industrial fans, centrifugal pumps, compressors

• Material handling, packaging machinery

• Automation systems requiring energy recovery

Related Models

• 31B040-503-4-00: 4.0 kW, 4‑quadrant regenerative

• 31B055-503-1-00: 5.5 kW, 3‑quadrant standard (no regeneration)

• 31C055-503-4-00: 5.5 kW, higher‑performance 31C series