Libratherm offers ready to use SCR Power Controller for electrical heating loads ranging from 5 KW (Single Phase) to 360KW (Three Phase). This Thyristor Power Regulator Module comprises of suitable triggering card model LTC-12 or LTC-13 or LTC-15 or LTC-18, suitably rated back to back connected SCR Modules (with electrically isolated base, mounted on the heat sink, input and output clip-on type heavy-duty connectors or aluminum/copper bus bars, semiconductor fuses and thermal cutouts. The entire assembly is mounted on an MS powder-coated enclosure, which in turn can be easily mounted inside the closed control panel as desired. A complete ready to use phase angle controlled control panel with a suitable PID / Program Temperature Controller can also be supplied as per the user’s specifications and requirements. For DC rectified output the assembly remains the same, except the SCRs are connected in Bridge Configurations.

Key Features:

• 25 Amps to 460 Amps capacity (5KW to 360KW).
• Single phase / Two phase / Three phase versions.
• Suitable for 3 or 4 wire star configuration / 3 or 6 wire delta configurations / 1 or 2 or 3 phase DC rectifier configuration.
• Auto / Manual operation.
• Accepts (4-20)mA / (0-5)VDC / (0-10)VDC control input (user selectable).
• Soft start and step less smooth control.
• Adjustable current control and over load trip feature.
• Isolated heat sink for safety.
• Simple and Modular design for easy servicing of firing cards and thyristors.

Applications:

Thyristor Power Controller has a varied application and can be used with heating elements like Nichrome, Canthal, Super Canthal, Silicon Carbide, Molybdenum, Infra-Red, step up or step down transformer, etc. where precise and accurate power and temperature control is required. There is a significant electrical power saving with respect to the conventional contactor type temperature control system. Thyristors have many direct and indirect advantages compared to the electromechanical contactors. Ideally suitable for resistive, transformer, inductive, or heating loads like Silicon Carbide and Molybdenum which exhibits significant changes of resistance with an increase in temperature.

Technical Specification

Ordering Information