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