PR1-E-3kW | 12.5A Single-Phase Burst Fire Controller | 230V

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.