Description

PR1-E-3kW Single Phase Burst Fire Power Controller

The PR1-E-3kW is a compact and reliable single-phase burst fire power controller designed for precise control of resistive heating loads. Utilising advanced fast pulse zero-voltage switching technology, it provides seamless power regulation while minimising flicker and eliminating radio frequency interference (RFI).

Designed for HVAC and industrial heating applications, the PR1-E-3kW offers flexible control via a DC signal or manual potentiometer input. Integrated semiconductor fusing, automatic over-temperature protection, and a robust enclosed heatsink ensure safe and dependable operation in demanding environments.

With its compact footprint, straightforward installation, and maintenance-friendly design, the PR1-E-3kW is an ideal solution for controlling single-phase heating systems where accurate and reliable power management is required.

Key Features

• Precise single-phase burst fire control for resistive loads
• Fast pulse zero-voltage switching technology
• Minimises flicker and eliminates RFI
• DC signal or manual potentiometer control
• Automatic reset over-temperature protection
• Integral semiconductor fuse protection
• Built-in heatsink for effective thermal management
• Status LED indication tracking output level
• Sensor loss detection
• Compact enclosed design
• Easy-access power and control terminals
• Suitable for HVAC and industrial heating applications

Technical Specifications

Electrical

Power rating: 3kW (12.5A)

Supply voltage: 240V RMS nominal

Input voltage: 230V RMS ±10%

Frequency: 50/60Hz

Control Input Options

Voltage signal input:

• 0–10V DC (factory setting)
• 0–5V DC (selectable via SW1)

Manual control:

• 5kΩ potentiometer (not supplied)

Status Indication

Output status LED:

• LED intensity varies with control signal level

Protection Features

Over-temperature protection

Trip temperature: 90°C ±1°C

Automatic reset temperature: 85°C ±1°C

LED indication: Flashes at 0.5-second ON/OFF intervals

Sensor loss detection

LED indication: Flashes at 1-second ON/OFF intervals

Terminal Connections

Power and Earth: 2.5mm² maximum cable entry

Control signal: 2.5mm² maximum cable entry

Torque Settings

Power and earth terminals: 0.5Nm

Fusing

Fuse type: F16A ceramic quick-blow ferrule fuse

Fuse size: 6mm Ø × 32mm

Environmental

Maximum ambient operating temperature: 65°C

Mechanical

Dimensions: 

140mm (L) × 99mm (W) × 80mm (H)

Fixing centres:

75mm (W) × 120mm (L)

4 × 4.5mm mounting holes

Top two fixing holes are keyhole slots

Weight: 1.1kg

Safety Information

• Always isolate the power supply before removing the cover.
• The heatsink and metal components may become extremely hot during operation.
• Do not obstruct enclosure ventilation openings.
• A load break switch and contact breaker should be installed in the load supply.
• The contactor coil supply should be interrupted by an over-temperature thermostat and airflow monitoring device where appropriate.

Applications

Suitable for single-phase resistive heating loads including:

• HVAC heating systems
• Battery heaters
• Hot water tanks
• Heating cables
• Process heating equipment
• Industrial heaters
• Commercial heating systems
• Trace heating applications
• Environmental heating control systems

Optimise your single-phase resistive load control with the reliable and efficient PR1 thyristor stacks. Whether for HVAC applications or various industrial processes, the PR1-E series provides robust performance and easy installation, ensuring seamless and safe operation.