Libratherm offers ready to use compact 3 phase SCR power regulator for electrical heating loads ranging from 6 KW to 24KW @ 380/415/440VAC 3-phase supply. This power pack module comprises of SCR triggering card, rightly rated back to back connected SCRs (with electrically isolated base)- mounted on the Aluminum heat sink. SCR devices are protected by suitable RC-snubbers. Heavy-duty Terminal connectors are provided for 3 phase AC supply, control signal, and heater cables. The entire assembly is mounted on an aluminum Heat sink and enclosed with MS powder-coated enclosure, which in turn can be easily fixed inside the closed control panel as desired. Potentiometric settings are accessible to the user for on-site calibrations, max/min voltage output and ramp up / ramp down time adjustments, and for current limit and overload settings. This model accepts the control signal from external DDC, PID, or PLC controller in the form of (0-5)V, (0-10)V, or (4-20)mA, user selectable through DIP switch settings.

Key Features:

• Digital Firing Card is Field-proven for 25+ years.
• Semikron – Germany brand SCR devices.
• User selectable control signal (4-20)mA/(0-5)VDC/(0-10)VDC/Potentiometer.
• Auto-detection of phase sequence and auto-synchronization.
• Heatsinks are mounted with thermistors – protection against over-temperature.
• Built-in Current Control and Overcurrent Trip facility to limit the desired current through heaters. This feature saves on the cost of using external safety fuses.
• Gradual Soft increase and Soft decrease of voltage across the load unlike ON-OFF type.
• Separate auxiliary supply of 230 VAC +/-10%.
• SCR devices are protected by suitable RC snubber and surge suppressors.
• Current control feature avoids the need for external Fuse in series with the load.
• Rugged metal enclosure & modular design – easy to install & easy to maintain.
• Libratherm Thyristor power regulators are time-tested & field-proven in all major industries.
• More than 1000 installations have taken place across India & abroad and the number is growing rapidly.

Application Areas:

• Furnace/Oven control
• AHU and De-Humidifier
• Hot Air Generator
• Industrial Heating control

Thyristor-based Power Regulator has a varied application and can be used with heating elements like Nichrome, Tungsten, Kanthal, Infra-Red, Ceramic, etc. where precise, accurate, and continuously variable temperature/power control is required. There is a significant power saving when compared to conventional contactor type power/temperature control system, which also depends on various other factors. It can be used for small laboratory ovens, furnaces, Air heaters, etc…. Thyristor-based controls are recommended for smooth and steady-state control, which enhances the heater life and thereby reduces the maintenance cost.

Technical Specification

Ordering Information