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Model details

r-tecby Alkur RT-380A

r-tec 380A Control Unit

380 V three-phase open-board industrial control unit — integrated into the facility fuse panel in panel installations. The open-board variant of I-380.

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Technical files

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Specifications and installation information can be viewed or downloaded as PDFs from our server.

Key technical specifications

The most critical technical parameters of this product.

  • Mains voltage380V three-phase 50 Hz
  • Drive typeDirect-drive (with relays)
  • StructureOpen-board (for panel installation)
  • Current protectionTrimpot-adjustable
  • Phase sequence controlAutomatic
  • Low-voltage protection<310 V → stops
Show all technical specifications (8)

Protection

FeatureValue
Internal phase fuseSeparate for each phase

Control

FeatureValue
Number of terminals13

Overview

Electronically, the 380A is identical to the I-380 — it carries the same 380 V three-phase direct-drive board. The one thing that separates them is the cabinet structure: where the I-380 arrives as a wall-type control box with a cover, the 380A is delivered as the open-board variant of this portfolio and integrated straight into the facility’s main fuse panel. That approach slots neatly into the central control panel architecture of large facilities.

r-tec 380A Control Unit — product image

380A vs I-380 — structural difference

380AI-380
ElectronicsSame (380 V direct-drive)Same (380 V direct-drive)
StructureOpen boardCovered control cabinet
ButtonsNone (from panel exterior)Open / Close / Stop integrated
Installation locationFuse panel / site cabinetWall (near the door)
Site user accessOnly technicianOperator can access
InstallationPanel electrician requiredMechanical technician

Why open board?

In large industrial facilities, the central control panel philosophy is widespread:

  • All motor controls are gathered in a single fuse panel.
  • Standard DIN rail + 35 mm slot installation inside the panel.
  • Operator buttons are taken outside the panel (to a control point above the panel or to a site button cabinet).
  • During maintenance the panel cover is opened from a single point; there is no separate door/cabinet for each motor.

380A is suitable for this approach — comes as a DIN rail-mounted board instead of the cabineted version of I-380.

High voltage — safety critical

Because 380A is an open-board structure, the high-voltage bars on the board are directly visible. This situation:

  • Only qualified technician access is mandatory.
  • It is used with the panel cover closed; when opened for maintenance, all energy must be cut absolutely.
  • The IP protection class is sufficient for inside the panel (IP20 typical), should not be located outside the panel.

Target projects

  • Large industrial facility (5+ doors controlled from a single panel)
  • Automotive production factory
  • Logistics terminal central control room
  • Organised industrial zone (OSB) main entrance + service entrances
  • Port + free trade zone multi-door systems

Field discipline

  • All energy must be cut before touching the high-voltage bars on the board. This is the most critical safety rule — during maintenance/installation the panel main breaker must be pulled, in a multi-phase installation each phase must be checked with a separate meter.
  • DIN rail installation — Fixing on a standard 35 mm DIN rail. The slot requires 4-6 module widths.
  • Clamp labelling — In a multi-motor panel, each clamp group must be clearly labelled with which door it is connected to.
  • Earthing — A single earthing bar inside the panel; all motor chassis are connected here.
  • Button + signal cables — A 0.75-1 mm² screened cable is recommended for operator buttons outside the panel (against noise).

Model notes

All energy must be cut before touching the high-voltage bars on the board. In single-motor / small-facility installations, the I-380 cabineted version is more practical; in multi-motor + central panel philosophy, the 380A open board is preferred.

Frequently Asked Questions

Below we've compiled the most common questions and answers regarding this product.

  • All LEDs are normal on the r-tec board but the motor does not move and hums/makes noise

    The symptom indicates that power is not fully reaching the motor: a loose or detached supply lead at the motor output terminal, or a lost phase on a three-phase supply. First step: cut the power and check that the connections at the motor output terminal are tight. If the cables are in place, measure the voltage across the motor output leads; on a three-phase (380 V) board the nominal voltage (380 V) should be present between each pair of phases. If a phase or voltage is missing, review the supply and terminal connection with an authorized person.

  • r-tec control board: the door/boom moves the wrong way (towards closing) on an open command

    Cause: the motor rotation direction is wired in reverse. First step: cut the power; on DIP-switch boards such as GATE 24, change the direction DIP switch (typically no. 4); on sliding/three-phase boards, swap any two of the motor supply leads to correct the direction. Always cut the power before working; after the direction change, re-confirm the limit/encoder learning at the closed and open ends.

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r-tec 380A Control Unit
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