1) An SCR has a circuit fusing rating of 90 A²s. The device is being used in a circuit where it could be subjected to a 120 A surge. Determine the maximum allowable duration of current surge.

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1) An SCR has a circuit fusing rating of 90 A²s. The device is being used in a circuit
where it could be subjected to a 120 A surge. Determine the maximum allowable
duration of current surge.
2) An SCR half-wave rectifier has a forward breakdown voltage of 150 V when a gate
current of 1 mA flows in the gate terminal. If a sinusoidal voltage of 400 V peak is
applied, determine:
a. Firing delay angle (a).
b. The average output voltage.
c. The power output for a load resistor of 200-ohms.
Transcribed Image Text:1) An SCR has a circuit fusing rating of 90 A²s. The device is being used in a circuit where it could be subjected to a 120 A surge. Determine the maximum allowable duration of current surge. 2) An SCR half-wave rectifier has a forward breakdown voltage of 150 V when a gate current of 1 mA flows in the gate terminal. If a sinusoidal voltage of 400 V peak is applied, determine: a. Firing delay angle (a). b. The average output voltage. c. The power output for a load resistor of 200-ohms.
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