Thyristor-based Power Regulator has varied applications and is commended for smooth and steady-state control. It 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. Compared to conventional contactor-based temperature/power control systems there is a significant advantage of a Thyristor-based control system, such as consistent heating, enhanced heater life, power saving, accurate control, and reduced maintenance cost. The POW-12 can be used for small laboratory ovens, furnaces, Air heaters, etc…

Libratherm offers ready to use compact 3 phase 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 as well as for the Heater wires at one end and Light duty terminals are provided for control signals at another end. The complete 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 an 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.
Libratherm offers ready to use control panel comprising PID or Ramp/Soak temperature controller, 3 phase Thyristor of required ratings and heavy-duty switch gears. Such control panels are in use for AHU control, Furnace control, Hot Air Driers, Electrical Boilers, etc…

Key Features:

• Self-synchronized six pulse SCR firing card
• Semikron – Germany brand 3 phase SCR device.
• 1 x AI, 1 x AO, 1 x DI, 2 x DO
• User selectable control signal (4-20)mA/(0-5)VDC/(0-10)VDC/Potentiometer(1 x AI)
• Auto-detection of phase sequence and auto-synchronization.
• Built-in cooling fan for 21KW and 24KW models.
• Heatsinks are mounted with thermistors – protection against over-heating
• Facility to start/stop thyristor using external potential free contact (1 x DI)
• Front Panel LEDs indicate the status of over current, over temperature, phase reversal etc…
• Built-in Current Control and Overcurrent Trip facility to limit the desired current through heaters
• Retransmission of 4-20mA or 0-10V proportional to the load current (1 x AO)
• Trip Contact Relay and Healty Relay Contacts (2 x DO)
• Gradual Soft increase and Soft decrease of voltage across the load, unlike ON-OFF type.
• Separate auxiliary supply of 90-250 VAC, 50/60Hz
• SCR devices are protected by RC snubbers 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 2000 installations have taken place across India & abroad and the number is growing rapidly.
• CE Certified

Application Areas:

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