Description

PR1-E-1.5kW Single Phase Burst Fire Power Controller

The PR1-E-1.5kW is a compact single-phase burst fire power controller designed for accurate and reliable control of resistive heating loads. Utilising advanced fast pulse zero-voltage switching technology, it delivers smooth power regulation while minimising flicker and eliminating radio frequency interference (RFI).

Designed for HVAC and industrial heating applications, the PR1-E-1.5kW provides flexible control through either a DC signal or manual potentiometer input. Integrated semiconductor fuse protection, automatic over-temperature monitoring, and an enclosed heatsink ensure dependable performance and long service life.

With its compact size, straightforward installation, and robust construction, the PR1-E-1.5kW is an ideal solution for low-power heating applications requiring efficient and precise energy control.

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 efficient 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: 1.5kW (6.3A)

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: F10A ceramic quick-blow ferrule fuse

Fuse size: 6mm Ø × 32mm

Environmental

Maximum ambient operating temperature: 65°C

Mechanical

Dimensions: 140mm (L) × 99mm (W) × 45mm (H)

Fixing centres: 

75mm (W) × 120mm (L)

4 × 4.5mm mounting holes

Top two fixing holes are keyhole slots

Weight: 0.5kg

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 series provides robust performance and easy installation, ensuring seamless and safe operation.