Product Details:
Minimum Order Quantity | 1 Number |
Type | Semi-Automatic, Manual |
Maximum Operating Temperature | 60-100 Degree C |
Brand | LIBRATHERM |
Model | LTC-13 |
Model | Product Description | Size (w x h x d) mm. |
LTC-13-1 | Single phase SCR triggering card with Current Limit and Current Trip feature (w.r.t. Neutral) | 110 x 135 x 70 |
LTC-13-2 | SCR triggering card with Current Limit and Current Trip feature (Two phase w.r.t. Phase 2) | 110 x 135 x 70 |
LTC-13-DCR | Single and Two phase SCR Triggering card suitable for DC full wave bridge rectifier with shunt feedback (full wave half control) | 110 x 135 x 70 |
Libratherm offers SCR triggering cards model LTC-13 which are designed to fire or trigger back to back connected SCRs using synchronized phase angle control technique. The card accepts analogue control signals of (0-5)/(0-10)VDC or (4-20)mA and provides proportional gate/cathode triggering pulses G1K1 + G2K2. These pulses can be used to trigger back-to-back connected SCRs upto 1000Amps with gate current upto 300mA. The card also provides built in regulated 5VDC supply to connect external potentiometer to manually control the SCR firing. The on card ramp up and ramp down settings allows gradual rise and fall of the voltage levels across the load.
Many times it is required to limit the current flowing through the load. Such current limiting feature is available in LTC-13 – for single phase and two phase load. Whereas for 3 phase load, common three phase current limiting is achieved by LTC-18 card. The load current or Line current feedback is derived from the external CTs. This feature is useful for transformer load or inductive loads or for heating elements like Silicone Carbide and Molybdenum Disilicide, which exhibits significant change of resistance with increase in temperature. This feature will restrict the maximum load current to the value set using the on card current limit (CL) potentiometer. On sudden increase in the current the current trip feature will over-ride the current limit feature and the firing of the thyristor will stop instantly. The trip contacts are available on the terminals.
Additional Information:
Product Details:
Available Configurations | Single phase,Two phase,Three phase (3 or 4 wire star and 3 or 6 wire delta) for AC load |
Control Action | Phase angle control (self synchronized) |
Control Signal | (4-20)mA / (0-5)VDC / (0-10)VDC External potentiometer (any one) |
Smooth Control | Adjustable Ramp Up and Ramp Down Time for soft increase and decrease of output voltage |
Model | Product Description | Size (w x h x d) mm. |
LTC-15-3 | 3 Phase SCR Triggering Card suitable for 3 or 4 wire star connected load and 3 or 6 wire delta connected load | 125 x 160 x 70 |
LTC-15-DCR | 3 Phase SCR Triggering Card suitable for 3 phase DC bridge rectifier (full wave full control) | 125 x 160 x 70 |
Additional Information:
Product Details:
Minimum Order Quantity | 1 Number |
Usage/Application | Industrial |
Model Name/Number | LTC-18 |
Type | Automatic |
Brand | Libratherm |
Frequency | Aux. Supply : 230VAC+/-10%. 50Hz |
Accuracy | Design for Precise Control of Load |
Current Transformer Ratio | It has Current Limit and Overload Trip Feature |
Maximum Operating Temperature | 70oC |
Mode | Phase Angle Firing Technique |
Operating Current | Available from 5Amp to 1000Amp Load |
Operating Voltage | 440VAC |
Configuration | Available in Star with Neutral/Without Neutral, Close Delta, Open Delta |
Weight Approximate | 2.5kg |
Country of Origin | Made in India |
Model | Product Description | Size (w x h x d) mm. |
LTC-18-3 | 3 Phase SCR Triggering Card suitable for 3 or 4 wire star connected load and 3 or 6 wire delta connected load with current limit and over load trip features | 115 x 210 x 85 |
LTC-18-DCR | 3 Phase SCR Triggering Card suitable for 3 phase DC bridge rectifier with shunt feedback. (full wave full control) | 115 x 210 x 85 |
Additional Information:
Product Details:
Minimum Order Quantity | 1 Number |
Model Number | MSST-15 |
Power | 3 HP TO 300 HP |
Brand | LIBRATHERM |
Phase | 3 PHASE |
Aux Supply Voltage | 230 VAC +/- 10%,50/60 Hz. Max-10VA |
Configuration | Three phase close delta (In Line) or open delta (Inside Delta) |
Control Action | Phase angle control (self synchronized) |
Current Control | Current Limit and Current Trip settings using on card presets. Feedback is taken from external CT |
LED Indications | For Power ON,External Fault,Bypass,Over load Trip,Top of Ramp. |
Load type | Suitable for both 3 phase squirrel cage Induction motor and Slip ring motor |
Mounting | Flat plate mountable using 4 screws |
Output | Suitable Triggering Gate-Cathode pulses to fire back-to-back connected SCRs. 3 X (G1K1+G2K2) |
Relay Outputs DO | For Bypass relay,Fault Relay (Change over contacts) |
Settings | For adjusting ramp time and jump start voltage level. |
Size in mm | 200 x 137 x 90 mm (HWD) |
Smooth Control | Adjustable Ramp Up Time for soft Increase of output voltage. |
Additional Information: