General
11.62
The Division is responsible for the maintenance and repair of electrical and instrumentation equipment installed in pumping stations, treatment works, quarters and other locations of the Waterworks Office as well as for the design, procurement, installation and commissioning of new waterworks plant except for plant associated with the Plover Cove and High Island Water Schemes and the desalting project.
11.63
Assembly, repair and testing of general electrical and instrumentation equipment is undertaken in two workshops in Hong Kong and Kowloon Depots respectively. A specialist workshop is maintained in Sha Tin Treatment Works for the repair, calibration and testing of electronic instrumentation equipment, with another located in Kowloon Depot for the repair, calibration and testing of electrical metering and protective equipment. Details of routine works carried out by the Division are given in Appendix CC. While the number of electrical plant inspections and tests is lower than last year, due to minor inspections being grouped to form comprehensive inspections, a greater degree of coverage is actually being achieved.
Maintenance
11.64
The planned maintenance programmes operated by the Division cover 72 pumping stations, 15 treatment works and 48 minor installations. During the year the total installed electrical plant horsepower increased by approximately 33.7% from 67,506 to 90,246 brake horsepower. This comprises 69,530 brake horsepower operating at 3,300, 6,600 and 11,000 volts, the largest unit size being 3,400 brake horsepower; the remainder operates at 200 and 346 volts, the largest unit size being 480 brake horsepower. A wide variety of high and medium voltage switchgear, control and auxiliary equipment is installed for operation of this plant.
11.65
During the year 5 high voltage and 8 medium voltage motors developed faults. Eight motors were repaired by divisional staff, including 1 high voltage motor, the remainder being repaired under contracts with local and overseas contractors. Dynamic balancing of 10 high voltage variable speed motors installed in River Indus Pumping Station was carried out and measurements taken of floor vibrations.
11.66
With installation of the extension pumping plant at Sha Tin Treatment Works, the temporary pumping station was dismantled and electrical equipment removed to storage.
11.67
The telemetry cable connecting Sha Tin with Tai Po Tau Pumping Station was diverted at Fo Tan to suit development being carried out by the Civil Engineering Office. In addition, faults in similar cables between Sha Tin and Lion Rock Valve House, resulting from contractors' work in the area, were repaired. This special cable required the use of air-conditioned jointing tents since a controlled environment was necessary to balance and joint the cables.
11.68
Delays in delivery of plant for installation in Tai Mei Tuk Pumping Station necessitated the recommissioning of the floating pumping station at
General
11.62
The Division is responsible for the maintenance and repair of electrical and instrumentation equipment installed in pumping stations, treat- ment works, quarters and other locations of the Waterworks Office as well as for the desig, procurement, installation and commissioning of new waterworks plant except for plant associated with the Plover Cove and High Island Water Schemes and the desalting project.
11.63
Assembly, repair and testing of general electrical and instrumentation equipment is undertaken in two workshops in Hong Kong and Kowloon Depots respectively. A specialist workshop is maintained in Sha Tin Treatment Works for the repair, calibration and testing of electronic instrumentation equipment, with another located in Kowloon Depot for the repair, calibration and testing of electrical metering and protective equipment. Details of routine works While the number of carried out by the Division are given in Appendix CC. electrical plant inspections and tests is lower than last year, due to minor inspections being grouped to form comprehensive inspections, a greater degree of coverage is actually being achieved.
Maintenance
11.64
The planned maintenance programmes operated by the Division cover 72 pumping stations, 15 treatment works and 48 minor installations. During the year the total installed electrical plant horsepower increased by approximately 33.7% from 67,506 to 90,246 brake horsepower. This comprises 69,530 brake horsepower operating at 3,300, 6,600 and 11,000 volts, the largest unit size being 3,400 brake horsepower; the remainder operates at 200 and 346 volts, the largest unit size being 480 brake horsepower. A wide variety of high and medium voltage switchgear, control and auxiliary equipment is installed for operation of this plant.
11.65 During the year 5 high voltage and 8 medium voltage motors developed faults. Eight motors were repaired by divisional staff, including 1 high voltage motor, the remainder being repaired under contracts with local and overseas contractors. Dynamic balancing of 10 high voltage variable speed motors installed in River Indus Pumping Station was carried out and measure- ments taken of floor vibrations.
11.66 With installation of the extension pumping plant at Sha Tin Treatment Works, the temporary pumping station was dismantled and electrical equipment removed to storage.
11.67 The telemetry cable connecting Sha Tin with Tai Po Tau Pumping Station was diverted at Fo Tan to suit development being carried out by the Civil Engineering Office. In addition, faults in similar cables between Sha Tin and Lion Rock Valve House, resulting from contractors' work in the area, were repaired. This special cable required the use of air-conditioned jointing tents since a controlled environment was necessary to balance and joint the cables.
11.68
Delays in delivery of plant for installation in Tai Mei Tuk Pumping Station necessitated the recommissioning of the floating pumping station at
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