PR3-E-150kW | 210A Three-Phase Burst Fire Controller | 415V

Description PR3-E-150kW 210A 415V Three Phase Burst Fire Power Controller The PR3-E-150kW is a high-power three-phase burst fire power controller designed for precise control of large resistive heating loads using advanced two-thirds control technology. Engineered for demanding industrial heating applications, it delivers smooth and reliable power regulation while minimising mains flicker and eliminating radio frequency interference (RFI) through fast pulse zero-voltage switching. Designed for HVAC systems, industrial furnaces, ovens, dryers, and process heating equipment, the PR3-E-150kW supports multiple control input options, including voltage, current, and manual potentiometer control. Integrated safety features such as automatic thermal protection, phase loss detection, alarm relay outputs, and high-speed semiconductor fusing ensure dependable operation in critical environments. With its robust construction, integrated cooling fan, and advanced burst firing control modes, the PR3-E-150kW provides an efficient and reliable solution for high-capacity industrial heating control applications. Key Features High-power three-phase burst fire controller 150kW (210A) power handling capability Two-thirds control technology for resistive loads Fast pulse zero-voltage switching Minimises flicker and eliminates RFI Voltage, current, or manual potentiometer control Selectable fast or slow burst firing modes Automatic reset over-temperature protection Phase loss detection Sensor loss detection Voltage-free alarm relay output Integrated cooling fan High-speed semiconductor fuse protection Suitable for industrial HVAC and process heating applications Technical Specifications Electrical Power rating: 150kW (210A) Supply voltage: 415V RMS nominal Input voltage: 400V RMS ±10% Frequency: 50/60Hz Control Input Options Voltage Signal 0–10V DC (factory setting) 0–5V DC Current Signal 4–20mA Requires SW-I/V set to ON 270Ω (0.25W) resistor fitted across signal terminals Manual Control 5kΩ potentiometer Burst Fire Control Modes Slow Burst 1-second proportional time base Fast Burst Variable and non-proportional time base Reduced flicker operation Alarm & Monitoring Alarm Relay Voltage-free alarm contacts: Rated 125V AC @ 2A Alarm Relay Configuration SW1 OFF Relay continuously energised (normally closed) Trips on fault condition SW1 ON Relay de-energised (normally open) Closes during fault condition Status LED Tracks controller output level Changes intensity according to control signal Protection Features Over-Temperature Protection Trip temperature: 90°C ±1°C Automatic reset temperature: 85°C ±1°C Status LED indication: Rapid flashing ON/OFF pulse Phase Loss Detection Status LED indication: Slow flashing at 1.5-second intervals Sensor Loss Detection Status LED indication: Continuous equal ON/OFF flashing Cooling Cooling Fan 120mm fan fitted as standard 230V AC supply Alternative 110V AC and 24V AC options available Terminal Connections Phase Power M8 stud terminals with nut and washer Earth M6 stud terminal with clamp washer Auxiliary Connections Remote supply Alarm relay Control signal All via: 2.5mm² rising clamp terminal blocks Torque Settings Power Terminals M8 terminals: 12–15Nm M6 terminals: 4.5–5.5Nm Fusing High-speed semiconductor fuse: 250EET (250A) Environmental Maximum operating temperature: 65°C Mechanical Dimensions: 266mm (D) × 345mm (W) × 250mm (H) Fixing centres: 322mm (W) × 160mm (L) 4 × 5mm mounting holes Weight: Approximately 15kg Safety Information Isolate the supply before removing the cover. Heatsink and metal components can become extremely hot during operation. Do not obstruct enclosure ventilation slots. Appropriate load break switches and contact protection devices should be fitted as part of the installation. Installation should be carried out by suitably qualified personnel. Applications Suitable for three-phase resistive load control including: HVAC heating systems Air curtain heating systems Industrial furnaces Industrial ovens Drying systems Process heating equipment Heat treatment systems Manufacturing heating processes Commercial heating installations Large-scale industrial heating applications