Part Number SKET40014E Three Phase 3 Leg Zero Cross Over SCR Firing Card For Capacitor Switching, Max forward voltage 17V, Max forward impulse current 14kA

Description libratherm offers thyristor switch card model tsc, 313, Tailored specifically for apfc Self-regulating power factor correction applications to switch on and off, 3, Phase derived from, Capacitor banks the command from the apfc relay module. These cards are developed to trigger silicon, Controlled rectifiers scrs or thyristors. The gate/cathode triggering pulses are generated using zero cross, Over firing techniques. The three sets of gate/cathode pulses are galvanically isolated using the on, Card ferrite core pulse transformers. Each card can simultaneously trigger 3 sets of back, To, Back scr, Scr modules or 3 sets of back, To, Back scr, Diode modules to switch a 3, Phase capacitor bank. Tsc, 313 accepts control signals offered in the shape of of relay contact or dc pulse from the apfc relay unit. When the command is on, Capacitor banks are associated with the power lines, And capacitor banks are disconnected when the command is off. Each tsc, 313 card has the provision to accept 2 external thermostat contacts, That iperfect for operate the cooling fan mounted on the heat sinks and to trip the circuit in case the thermal dissipator is overheated. On, Card leds indicate the on/off condition of the incoming dc power supply, The on/off status of the capacitor banks, And the heat sink temperature. Typically, Each power factor controller gives 8 to 16 outputs to select that many capacitor banks of different kvar contingent upon the total kvar demand to preserve the unity power factor. Hence, For each output from apfc relay module, It will be required to use 8 to 16 nos. Of tsc, 313 cards. The apfc panel builders can use tsc, 313 cards as an independent firing card and wire the scr modules separately mounted on the heat sink in the panel. The physical isolation of electronic cards and scr modules makes the overall reliable resulting, System safer in Effortless upkeep and service.