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:

• Digital Firing Cards for single-phase/two phase/three phase are Field-proven for 25+ years.
• Semikron make SCR Modules – SKKT Series are used for AC to AC control and SKKT / SKKH Series are used for AC to DC control.
• Auto-detection of phase sequence and auto-synchronization.
• Heatsinks are mounted with thermistors to protect against overheating and auto cut-off of firing in case of over temperature.
• Built-in Current Limit and Overcurrent Trip facility to limit the desired current through heaters. This feature saves on the cost of using external safety fuses.
• Soft start and Soft stop voltage across the load.
• Separate auxiliary supply of 230 VAC with built-in RFI/EMI filter – Thereby electronics are safe against line voltage fluctuations and RFI/EMI electrical noise.
• SCR Modules are protected by suitable RC snubber and surge suppressors.
• High-speed ball bearing type cooling fan – To keep Thyristor cool.
• Built-in safety fuse for the cooling fan and Auxiliary supply.
• 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 Thyristors are time tested & field-proven in all major industries for the last 25+ years.
• More than 1000 installations have taken place across India & abroad and the number is growing rapidly.
• Usage of best in quality components since we understand that downtime and service cost is more expensive than the cost of the product.

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 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.