In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920âbeginning the era known as Prohibition.
Because time constant calculations are important, and often needed, it is better to make the definition of the time constant (T) in a CR circuit: THE TIME TAKEN FOR THE VOLTAGE ACROSS A CAPACITOR TO INCREASE BY 63.2% OF THE DIFFERENCE BETWEEN ITS PRESENT AND FINAL VALUES.
This is the maximum delay a circuit breaker will have during short time overcurrent condition when the circuit breaker does not receive a signal from a Zone Selectively Interlocked downstream circuit breaker. The maximum value of this delay is shown by a single line on the trip curve.