PR3-E-36kW SPM

Description

The PR3-E S/SP/SPM range of thyristor stacks provides full, seamless control of three-phase resistive loads using a two-thirds control technique. Power levels can be controlled either by a DC signal or manually using a 5kΩ potentiometer. The PR3-E burst firing control stacks utilise fast pulse, zero volts switching technology to minimise flicker and eliminate RFI problems. These controllers feature an automatically resetting temperature trip, integral semiconductor fuses, and an integral volt-free trip/enable input for external thermal trip wiring. Available in two power ratings, 30kW and 36kW, the SPM (Standard Plus Monitoring) version includes HS fuses, an internal power supply, and SCR/HS Fuse monitoring. All models offer easy access to signal and power terminals for straightforward installation.

Applications

The PR3-E Series is suitable for 3-wire, 3-phase floating-star or closed-delta configured resistive loads. Ideal for the Heating, Ventilating, and Air Conditioning (HVAC) market, especially for air curtain applications, it is also perfect for furnaces, ovens, dryers, and hot plates.

Technical Specifications

• Power (Current) Ratings:
  • 30kW (42A)
  • 36kW (50A) @ 415V RMS nominal
• Input Voltage: 400V RMS ± 10%
• Frequency: 50/60 Hz
• Control Signal Input Options:
  • 0 – 5V or Manual using 5kΩ Potentiometer: SW1-3: OFF, SW1-5: OFF, SW1-6: OFF
  • 1 – 5V: SW1-3: ON, SW1-5: OFF, SW1-6: OFF
  • 0 – 10V: SW1-3: OFF, SW1-5: OFF, SW1-6: ON
  • 2 – 10V: SW1-3: ON, SW1-5: OFF, SW1-6: ON
  • 0-20mA: SW1-3: OFF, SW1-5: ON, SW1-6: OFF
  • 4-20mA: SW1-3: ON, SW1-5: ON, SW1-6: OFF
• Alarms Relay Contact Rating: 2A @ 125V AC Max.
• Indicators:
  • Power LED
  • Status LED changes intensity during phase angle soft start or flashes in sync with bursts
  • Fault LED flashes continuous fast pulsing at over-temperature (activates @ 90°C ±1°C, deactivates @ 85°C ±1°C)
  • Phase Loss Detection: Fault LED flashes continuous slow pulsing
  • Sensor Loss Detection: Fault LED flashes fast pulsing
  • SCR/Fuse Fault: Fault LED and Status LED alternately flash (SPM model only)
• Cable Terminations:
  • Phase Power: 10mm² Rising Clamp Terminal Block
  • Earth: 10mm² Rising Clamp Terminal Block
  • Remote supply, Alarm relay, Enable, Control signal: 2.5mm² Rising Clamp Terminal Block
• Terminal Torque Spec: 1.2Nm (10mm²) Power Terminals only
• Fusing:
  • 30kW: 56ET (56A) High-Speed Semiconductor type fuse, or equivalent
  • 36kW: 63ET (63A) High-Speed Semiconductor type fuse, or equivalent
• Ambient Temperature: 45°C without de-rating
• Dimensions: 152mm (D) x 241mm (W) x 115mm (H)
• Fixing Centres: 4 x 5.5mm ø holes on centres 220mm (W) x 130mm (D)
• Weight: 2.6kg Max. (all models)

Key Features

• Seamless Three-Phase Control: Provides smooth and precise control of resistive loads.
• Advanced Technology: Utilizes fast pulse, zero volts switching to reduce flicker and RFI.
• Safety Features: Includes an automatic resetting temperature trip and integral semiconductor fuses.
• Easy Installation: Designed with accessible signal and power terminals.
• Flexible Control Options: Offers both DC signal and manual control options.
• High Performance: Suitable for demanding HVAC applications, as well as furnaces, ovens, dryers, and hot plates.

The PR3-E Series SPM models are the ideal solution for managing high-power HVAC systems and other industrial heating applications, ensuring reliability, efficiency, and safety.