HIGH VOLTAGE ELECTRICAL TESTING
Circuit breakers for safeguarding America's power lines are given rigid high voltage tests before shipment from Westinghouse's East Pittsburgh Works.
Artificial lightning flashing across the arc between the two huge ball electrodes at the Westinghouse Electric & Manufacturing Company's East Pittsburgh Works, where transformers and circuit breakers are given rigid high voltage tests before being put into service on America's power lines.
Circuit breakers for safeguarding America's power lines are given rigid high voltage tests before shipment from the East Pittsburgh Works of the Westinghouse Electric and Manufacturing Company. This photo shows test in progress with a volt [sic] of "artificial lightning" passing between the huge ball electrodes of the testing apparatus.
Original Caption by Science Service