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 advantages 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 a ready-to-use compact 3-phase power regulator for electrical heating loads ranging from 6 KW to 27KW @ 380/415/440VAC 3 phase supply. This power pack module comprises SCR- triggering card, a rightly rated back-to-back connected SCRs (with electrically isolated base)- mounted on the Aluminum heat sink. Suitable RC snubbers are provided to protect SCR devices.

Heavy-duty Terminal connectors are provided for the 3-phase AC supply, the Heater wires at one end, and control signals at another. The complete assembly is mounted on an aluminium heat sink and enclosed with an MS powder-coated enclosure, which can be easily fixed inside the closed control panel. Potentiometric settings are accessible for on-site calibrations, max/min voltage output and ramp up / ramp down time adjustments, and 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 a 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 used for AHU control, Furnace control, Hot Air dryers, 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 to 27KW 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 Healthy Relay Contacts (2 x DO)
• Gradual Soft increases and decreases of voltage across the load, unlike the ON-OFF type.
• Separate auxiliary supply of 230VAC, 50/60Hz
• SCR devices are protected by RC snubbers and surge suppressors
• Current control feature avoids needing an 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