Description

DMPR1-E-30kW 415V | Enclosed Dual Mode Thyristor Power Controller

The DMPR1-E-30kW from United Automation is a fully enclosed dual-mode thyristor power controller engineered for two-phase inductive or resistive loads up to 30kW at 415V AC.

Part of the DMPR1 Series, this advanced assembly offers user-selectable phase-angle, burst fire, or hybrid control, combined with wide frequency tracking (4–400Hz) for stable performance even on unstable supplies.

With integrated high-speed semiconductor fusing, heatsinking, status indication, and accessible terminals, the DMPR1-E provides a complete, ready-to-install industrial power control solution.

Key Features

• Dual Mode Control – Phase angle, burst firing, or hybrid combination
• Frequency Tracking (4–400Hz) – Reliable operation in unstable supply environments
• Integrated High-Speed Semiconductor Fuse – Enhanced protection
• Adjustable Ramp Control – 1 to 30 seconds soft start
• Built-in Current Limit – User resettable
• Comprehensive LED Status Indication
• Enclosed IP20 Design – Bespoke housing with accessible terminals

Technical Specifications

Power & Electrical Ratings

• Power Rating: 30kW (75A) @ 415V RMS (phase-to-phase)
• Input Voltage: 415V RMS ±10%
• Supply Frequency: 4–400Hz (active tracking)
• Optional 110V version available upon request

Control Input Options

• 0–5V DC (up to 24V DC maximum input)
• 0–20mA / 4–20mA (SW1 selectable)
• Manual 5kΩ potentiometer

Control Modes (Selectable)

• Phase-angle
• Burst fire
• Voltage / Current signal
• Current limit enable/disable

Soft Start

• Adjustable 0–30 seconds
• Initiated at power-up or via enable input

Current Limit

• Built-in, user resettable
• Adjustable via SW1 position & VR1

Protection & Monitoring

LED Indicators

• Green Power LED – Confirms internal 5V DC supply
• Yellow Status LED –
  • Brightness proportional in phase-angle mode
  • Pulsed output in burst fire mode (1-second time base)
• Red Fault LED –
  • Pulses at 90°C heatsink temperature
  • Fully ON if internal fuse fails

Over-Temperature Protection

• Fan activates at 55°C (if fitted)
• Power shutdown at 90°C ±1°C
• Alarm relay de-energises on trip

Alarm Relay

• Rated 125V AC @ 2A

Mechanical & Installation

• Ingress Protection: IP20
• Dimensions:
  • 205 × 155 × 120 mm
  • 250 mm length with fan cowl
• Fixing Centres: 4 × 5mm holes
• Cable Terminations:
  • Power & Earth: 16mm² rising clamp (30kW)
  • Control & Relay: 1.5mm² rising clamp
• Terminal Torque: 4Nm (power terminals)
• Working Temperature: Up to 60°C
• Weight: 3.5kg (plus 0.52kg with fan cowl)

Fusing (415V Model)

• 100ET high-speed semiconductor lug fuse

Applications

The DMPR1-E-30kW is ideal for demanding industrial and commercial power control applications, including:

• Furnaces
• Ovens
• Dryers
• Air Curtains
• Hot Plates
• Heating & Ventilation Systems
• Inductive loads such as transformers

The DMPR1 Series Dual Mode Power Controller is a versatile and powerful solution for managing various industrial and commercial loads. Its dual-mode capability, frequency tracking, and robust protection features make it an ideal choice for ensuring efficient and reliable operation across a wide range of applications.