Description

PR3-DIN-12kW 415V Three Phase DIN Rail Burst Fire Power Controller

The PR3-DIN-12kW is a compact and efficient three-phase burst fire power controller designed for seamless control of electric heating loads. Utilising advanced two-thirds control technology and zero-voltage switching, it provides precise regulation of resistive heating elements while minimising Radio Frequency Interference (RFI).

Designed for integration with Building Management Systems (BMS), PLCs, and industrial control systems, the PR3-DIN-12kW offers reliable operation, DIN rail mounting convenience, automatic thermal protection, and alarm output functionality. Its compact design requires no additional heatsink, making installation straightforward and space-efficient.

Ideal for industrial heating applications, electric heating coils, heating cables, furnaces, and HVAC systems, the PR3-DIN-12kW delivers dependable performance in demanding environments.

Key Features

• Seamless three-phase electric heating load control
• Two-thirds control technique for efficient power regulation
• Zero-voltage switching technology to minimise RFI
• Compact DIN rail mounting design using TS35 rail
• 0–10V DC signal control
• Automatic reset over-temperature protection
• Alarm output for fault and power supply monitoring
• LED output status indication
• No additional heatsink required
• Easy-access signal and power terminals
• Suitable for BMS and industrial control system integration

Technical Specifications

Electrical

• Power rating: 12kW (17A)
• Supply voltage: 415V RMS nominal
• Input voltage range: 24V to 440V AC RMS (3-phase)
• Frequency: 50/60Hz

Control Input

• Input signal:
  • 0–10V DC

Auxiliary Power Supply

• Remote supply required:
  • 24V AC or DC ±10%
  • 40mA

Alarm Output

• 24V AC or DC alarm output (same as supply voltage)
• Output normally present during healthy operation
• Drops to 0V under:
  • Over-temperature condition
  • Power supply failure

Status Indicators

• T1 and T3 LEDs indicate output ratio and controller activity

Protection Features

• Automatic reset over-temperature protection
• Trip temperature:
  • 90°C ±5°C
• Reset temperature:
  • 85°C ±5°C
• Alarm output for fault indication

Terminal Connections

Power Connections

• Rising clamp terminal block
• Suitable for up to 6mm² cable

Signal, Alarm and Supply Connections

• Rising clamp terminal block
• Suitable for up to 2.5mm² cable

Torque Settings

• Power terminals:
  • 0.8Nm

Fusing

• 20A (20ET) High-Speed Semiconductor Fuse or equivalent MCB

Environmental

• Maximum ambient operating temperature:
  • 40°C

Mechanical

Dimensions

• 217mm (W) × 87mm (H) × 90mm (D)
• Dimensions include DIN mounting clips
• Firing circuit terminals front-facing

Mounting

• TS35 DIN rail mounting

Weight

• 0.6kg

Applications

Suitable for three-phase resistive heating loads including:

• Electric heating coils
• Heating cables
• Electric furnaces
• Industrial ovens
• HVAC heating systems
• Process heating equipment
• Building Management System (BMS) controlled heating
• Commercial and industrial temperature control systems

The PR3-E Series provides a reliable and efficient solution for controlling three-phase electric heating loads, offering easy installation and robust performance tailored for industrial HVAC applications.