Description

DMPR3-E 36kW 415V Enclosed Three-Phase Thyristor Regulator

The DMPR3-E from United Automation is a fully enclosed three-phase thyristor assembly designed for dependable control of resistive and inductive loads. Supporting up to 36kW at 415V, it offers user-selectable control modes—phase-angle, burst firing, or a hybrid combination—making it highly adaptable to varied industrial environments.

With frequency tracking from 30–80Hz, integrated high-speed semiconductor fuses, and an internal heatsink, the DMPR3-E is particularly well-suited to installations with unstable or fluctuating power supplies. Accessible internal terminals and multiple cable entry points ensure straightforward installation and maintenance.

Key Features

• Dual/Hybrid control modes: phase-angle, burst fire, or combined
• Frequency tracking 30–80Hz for unstable supply environments
• Adjustable ramp control 0–30 seconds for smooth power-up
• Integrated high-speed semiconductor fuses for enhanced protection
• Designed for inductive and resistive load control
• Accessible internal power and signal terminals
• Multiple front cable entry knock-outs for easy installation
• Internal heatsink for reliable thermal performance

Technical Specifications

• Power ratings:
  • 36kW (50A)
  • Based on 415V RMS nominal supply
• Input voltage: 415V RMS ±10%
• Frequency range: 30–80Hz
• Control input options:
  • 0–5V DC
  • 0–10V DC
  • 4–20mA
  • Manual 5kΩ potentiometer
• Load type selectable (SW4): Resistive or Inductive
• Adjustable ramp from power-up: 0–30 seconds
• Control limit / over-current trip:
  • 0–100mV DC or 0–25V DC
• Over-current warning: LED2 / LED3 pulse alternately

Cable Terminations (internal)

• Phase power: M6 nut & washer stud terminal
• Earth: M6 nut & clamp washer stud terminal

Cable Entry

• 6 × 20mm cable knock-outs
• 2 × 12mm holes (front side only)
• Cable glands not supplied

Terminal Torque

• 4.5 to 5.5 Nm (power and earth terminals)

Fusing (high-speed semiconductor type)

• 36kW model: 63ET fuse
• 54kW model: 100ET fuse

Environmental

• Maximum working temperature: 65°C

Dimensions & Weight

• Dimensions: 232mm (D) × 340mm (W) × 124mm (H)
• Fixing centres: 322mm (W) × 200mm (D), 4 × 6mm holes
• Weight: 5.2kg

Applications

Ideal for three-phase industrial power control in:

• Heating systems: furnaces, ovens, dryers
• Ventilation equipment: air curtains, hot plates
• Inductive loads such as transformers
• Industrial environments with unstable supply frequency