PR3-E-12kW | 17A Three-Phase Burst Fire Controller | 415V

Description PR3-E-12kW 415V Three Phase Burst Fire Power Controller The PR3-E-12kW is a compact and reliable three-phase burst fire power controller designed for seamless control of resistive heating loads using advanced two-thirds control technology. Engineered for HVAC, industrial heating, and process temperature control applications, it delivers precise power regulation while minimising mains flicker and eliminating radio frequency interference (RFI) through fast pulse zero-voltage switching. The controller supports both DC signal and manual potentiometer control, offering flexibility for integration into a wide range of heating systems. Integrated semiconductor fuse protection, automatic over-temperature monitoring, phase loss detection, and diagnostic LED indicators provide dependable operation and enhanced system protection. Designed for easy installation and long-term reliability, the PR3-E-12kW is an ideal solution for air curtains, ovens, dryers, furnaces, and other three-phase resistive heating applications. Key Features Seamless three-phase control using two-thirds control technology Fast pulse zero-voltage switching Minimises flicker and eliminates RFI DC signal or manual potentiometer control Automatic reset over-temperature protection Integral high-speed semiconductor fuse protection Phase loss detection Sensor loss detection LED status indication tracking output level Alarm relay output Easy-access power and control terminals Suitable for floating-star and closed-delta resistive loads Compact and robust industrial design Technical Specifications Electrical Power rating: 12kW (17A) Supply voltage: 415V RMS nominal Input voltage: 400V RMS ±10% Frequency: 50/60Hz Control Input Options Voltage Signal Input 0–10V DC (factory setting) 0–5V DC Current Signal Input 4–20mA SW3 set to “I” (ON) SW4 set to 0–5V mode Manual Control 5kΩ potentiometer Alarm & Monitoring Alarm Relay Relay contact rating: 2A @ 125V AC maximum Status LED LED intensity changes according to output level and control signal Protection Features Over-Temperature Protection Trip temperature: 90°C ±1°C LED indication: Continuous fast flashing Phase Loss Detection LED indication: Continuous slow flashing Sensor Loss Detection LED indication: Fast ON/OFF flashing Terminal Connections Phase Power and Earth 10mm² rising clamp terminal block Auxiliary Alarm Relay 2.5mm² rising clamp terminal block Remote Supply 2.5mm² rising clamp terminal block Control Signal 2.5mm² rising clamp terminal block Torque Settings Power Terminals 1.2Nm Fusing Recommended Fuse 20A high-speed semiconductor ferrule fuse 10mm Ø × 38mm Environmental Maximum ambient operating temperature: 40°C Mechanical Dimensions: 150mm (D) × 240mm (W) × 100mm (H) Fixing centres: 220mm (W) × 130mm (D) 4 × 5.5mm mounting holes Weight: 2.6kg Applications Suitable for 3-wire, three-phase floating-star and closed-delta configured resistive loads, including: HVAC air curtain systems Industrial furnaces Industrial ovens Dryers Hot plates Process heating systems Commercial heating equipment Temperature control systems Manufacturing heating processes Industrial thermal management applications 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.