All-Russian Research Institute of Cable Industry in Moscow

September 1976. USSR. Moscow. Senior engineer V. A. Naumov and junior researcher N. N. Merkulov (from left to right) during the testing of transformer cascade circuits in the new high-voltage building as part of debugging equipment for testing cables with operating voltages up to 1000-1100 kilowatts at the All-Union Research Institute of the Cable Industry. The tests were timed to coincide with the 59th anniversary of the Great October Socialist Revolution. The exact date of the photo is unknown. Viktor Budan/TASS