Thyristor Power Controller

Product Specification :
Model wise descriptions :

Note : For single phase heaters within 8 KW – our low cost model LTC-16 given in 21.2 can be considered.

Features :

• 15 Amps to 350 Amps capacity (1KW to 180KW).
• Single phase / 2 phase / 3 phase versions.
• Suitable for 4 wire star with neutral / open delta 6 wire configuration.
• Auto / Manual operation.
• Accepts (4-20)mA / (0-5)VDC / (0-10)VDC control input.
• Soft start for smooth control.
• Adjustable power and current limit.
• Isolated heat sink for safety.
• Simple and Modular design for easy servicing of cards and thyristors.
• Ideally suitable for resistive, transformer, inductive or heating loads like Silicone Carbide and Molybdenum which exhibits significant changes of
• resistance with increase in temperature.
• Other features like partial load failure detection can also be optionally provided

Applications :
The Thyristor Power Pack has a varied application and can be used with heating elements like Kanthal, Super Kanthal, Silicon Carbide, Molybdenum, Infra Red, etc. where precise and accurate power control is required. There is significant power savings with respect to conventional contactor type temperature control system, which also depends on various other factors.

Description of Thyristor Power Controller :
Libratherm offers ready to use SCR power controller for electrical heating loads ranging from 3 KW/Single phase to 300KW/3-phase. This power pack module comprises of suitable triggering card model LTC-12 or LTC-13 or LTC-15, suitably rated back to back connected SCR module (with electrically isolated base)- mounted on the appropriately rated heat sink (natural air or forced air cool), input and output clip-on type heavy duty connectors or copper bus bars, semiconductor fuses and thermal cutouts. The entire assembly is mounted on MS powder coated plate, which in turn can be easily mounted inside the closed control panel as desired. Complete ready to use control panel with suitable PID / Program temperature controller can also be supplied as per the user’s specifications and requirement.

Technical Specifications :

KW (Kilowatt) wise selection table for resistive heating loads :

• User can select the required power pack – either by actual current through the heaters or by KW of the heaters.
• Single phase, two phase or three phase selection can be done by selecting appropriate model from the table given above.
• If the heaters are designed at different voltage other than 230VAC or 415VAC, still the selection can be based on the actual current flowing through the heaters at the desired voltage level.
• For inductive / transformer load, the desired KW can be selected as per the requirement.