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r-tec by Alkur RT-PRINCE-400

r-tec PRINCE 400

24 V DC telescopic (single-piece extending) swing motor — for 3 m leaves and 400 kg doors. Key solution for villa and estate entrances with deep struts.

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Key technical specifications

The most critical technical parameters of this product.

  • Power supply 230 VAC 50 Hz
  • Motor voltage 24 VDC
  • Motor power 120 W
  • Speed 1.6 / 2.0 cm/s
  • Arm mechanism Telescopic (single-piece extending)
  • Max. leaf length 3 m
Show all technical specifications (14)

Mechanical

Feature Value
Max. door weight 400 kg
Motor dimensions 820 × 100 × 110 mm
Motor weight 7 kg
Protection class IP44
Operating temperature -20 – +55 °C

Control

Feature Value
Control unit G24 (compatible with battery charger board)

Protection

Feature Value
Thermal protection Standard

Maintenance

Feature Value
Maintenance period Liquid grease (every 6-12 months)

Overview

Once the leaf gets wide, PRINCE 24 is the answer within the range (also listed as PRINCE 400 in the technical PDF). By moving away from COUPER 24’s articulated (jointed) arm to a telescopic (extending) single-piece arm, it gains a decisive edge on leaves up to 3 m wide and 400 kg doors: on wide leaves an articulated arm falls short, the leaf swings and the door does not sit fully on closing. The standard speed profile is 1.6 / 2.0 cm/s; when more speed is needed, the PRINCE 600 variant offers 1.6 / 3.0 cm/s.

r-tec PRINCE 400 — product image

Telescopic arm — why?

Problems of the articulated (jointed) arm mechanism on wide-leaf gates:

  1. Elbow movement area — As the leaf widens, the sweep area of the elbow grows, strut distance becomes insufficient.
  2. Leaf swing — Because single-point support is insufficient, the heavy leaf vibrates during movement.
  3. Closing completeness — On wide leaves, the motor cannot reach the final point of movement, and the door does not fully close.

The telescopic arm solves these three problems:

  • The arm extends/retracts, the elbow sweep area remains small.
  • The single-piece structure reduces leaf swing.
  • Full opening + full closing is guaranteed at every leaf length.

Target projects

  • Premium villa main entrance gate (wide garden + deep strut)
  • Estate common main entrance (up to 3 m wide leaf)
  • Farm + agricultural facility garden gate (wide farm vehicle transit)
  • Historical residence + large land restoration
  • Car park / warehouse wide entrance gates (over 200 kg door)

Field discipline

  • Liquid grease maintenance period — The telescope mechanism requires liquid grease maintenance every 6-12 months for long life; follow the recommended intervals in the PDF. If maintenance is skipped, the telescope arm jams and movement is disrupted.
  • A-E dimensions — The distance diagram between the door hinge axis and the motor shaft axis differs from COUPER (telescope length is taken into account); the installation table in the PDF must be used.
  • Power trimpot calibration — The T1 motor power must be adjusted according to the door weight; borderline use causes thermal protection trips.
  • Hinge qualityIndustrial-class hinges are mandatory for heavy leaves (residential hinges are insufficient on 200 kg+ doors).
  • Double-leaf synchronisation — Two PRINCE 24s are driven in a double-leaf system with the G24-MTS module; sync limit + sync speed setting is critical.

Model notes

The telescope mechanism may require periodic liquid grease maintenance; follow the recommended intervals in the PDF. PRINCE 24 is the highest engineering segment of the swing portfolio — installation and service through our dealers is recommended.

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r-tec PRINCE 400
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