Model Code Explanation

• 31C: MOVITRAC 31C series, compact regenerative drive

• 055: Rated power 7.5 kW, rated output current 12 A

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

• 4: 4‑quadrant operation, regenerative braking, grid feedback

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

Technical Specifications

Input

• Rated voltage: 3‑phase AC 380–500 V (±10%)

• Frequency: 50 / 60 Hz (±10%)

• Rated input current: 10.7 A @ 400 V

Output

• Rated power: 7.5 kW (10 HP)

• Rated output current: 12 A @ 400 V

• Apparent power: 8.3 kVA

• Frequency range: 0–400 Hz

• Overload: 125% continuous; 150% for 60 s

Control & Interfaces

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

• Digital I/O: 6 in, 2 out, 1 relay

• Analog I/O: 2 in, 2 out

• Safety: No STO

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

Mechanical & Environmental

• Protection class: IP20

• Operating temperature: 0 °C to +45 °C (derate >40 °C)

• Storage temperature: ‑25 °C to +70 °C

• Size: Size 2

• Dimensions (W×H×D): approx. 200 × 260 × 285 mm

• Weight: approx. 6.5 kg

Key Features

1. 4‑quadrant regeneration

   Recycles braking energy to the grid; no external brake resistor needed.

2. Compact & robust

   IP20, Size 2, standard I/O for general‑purpose 7.5 kW applications.

3. Stable motor control

   V/F and sensorless vector control for steady speed/torque.

4. Full protection

   Comprehensive fault protection for long‑term reliability.

Typical Applications

Related Models

• 31C055-503-4-05: 7.5 kW, 4‑quadrant, with STO, no fieldbus

• 31C055-503-4-20: 7.5 kW, 4‑quadrant, PROFIBUS‑DP, no STO

• 31C055-503-4-25: 7.5 kW, 4‑quadrant, PROFIBUS‑DP + STO