typhoon 'Wanda' on 1st September, 1962, which considerably damaged electrical installations, particularly to the runway lighting at Kai Tak Airport and to the high tension submarine cable crossing Sulphur Channel from Kennedy Town to Green Island. Despite this extensive damage, the runway lighting was put back into operation by first light on 3rd September, 1962.
7.09. Modifications were completed to those remaining typhoon warning signal masts which were initially designed to display only supplementary signals. The Colony now has 32 sets of complete signals which are situated at strategic locations. These are maintained by the Electrical section.
7.10. The Electrical sub-section at the Airport continued to give a 24-hour service to the Civil Aviation Department. In addition to maintenance work, the sub-section also carried out new installations, modifications and alterations connected with the Airport. These included the H.T. Ring Main system feeding 4 sub-stations of the runway lighting system and apron services; 5 strobe beacons at Stonecutters Island and Sham Shui Po district; a crash alarm on the runway promontory pier; 12 sodium beacons to illuminate the marker board at Kowloon Tsai reservoir; red obstruction lights in many locations; re-routing and re-connecting the H.T. underground cables feeding the Airport N.W. approach lights during the construction of Kowloon City Roundabout and Kowloon Tsai Park, and the M.V. underground feeder to the 150 H.P. salt water pump set for the New Terminal Building air-conditioning plant.
7.11. Many electrical installations were carried out for the Waterworks Office. Among these were an earthing system at Muk Wu pumping station; the fluoride solvent water pump at four R.G. Filters; two 55 H.P. pump motors at Bowen Road pumping station; the overhead mains supply feeder for the cathodic protection apparatus at Sandy Bay pumping station; re-wiring of the Aberdeen pumping station and staff quarters; an emergency lighting system in the radio/telephone room in Argyle Street Depot; 'loss of head' indicators and differential pressure transmitters at Red Hill filters; and the re-wiring of 25 machine tools at Bullock Lane and Argyle Street Depots.
7.12. An active part was taken in the electrical installation connected with Queen Elizabeth Hospital. The works completed were the erection of a 14-panel hospital main switchboard which will be connected to 3 transformers of a total capacity of 3,500 Kva; the main
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