From the June 1, 1935, issue
By Science News
LOS ANGELES TRANSMISSION LINE HAS FAST BREAKERS
Along the 287,500-volt, 270-mile transmission line from Boulder Dam to Los Angeles will be placed eight circuit breakers, each incorporating three single-pole units. Seven of the single poles are shown in the illustration on the front cover of this week’s Science News Letter. Notice how small the man appears beside them.
The breakers will operate at a higher voltage than any others commercially installed; they are rated to interrupt the circuit in slightly more than one-third the time of the fastest breakers heretofore available for high voltages; and they will require less than 5 percent as much oil as would usual breakers for such voltage—1,000 instead of 23,000 gallons.