An SCR crowbar circuit is used to
A)control three phase ac motors.
B)protect against overvoltage conditions.
C)detect when a circuit is overheating.
D)protect against undervoltage conditions.

Question

Quizplus · Accepted Answer

An SCR (Silicon Controlled Rectifier) crowbar circuit is primarily used to protect sensitive electronic equipment from overvoltage conditions by short-circuiting the supply voltage and blowing a fuse or tripping a breaker, thereby safeguarding the connected equipment.

An SCR Crowbar Circuit Is Used to