D—4

equipments have been installed at Khandallah and Bunnythorpe Substations. A contract has been let for carrier-current protective relaying and communication equipment for use over the Tuai-Bunnythorpe 110 kV. line, and delivery of material is now overdue. A major deviation was made to the Bunnythorpe-Woodville telephone-line to allow it to clear the New Bunnythorpe site, and surveys made to bring all the other telephonelines into the site when required.

SOUTH ISLAND SYSTEM A. SYSTEM OPERATION AND LOAD DESPATCH 1. Load The maximum half-hourly demand on the Department's generating-stations was 128,745 kW. at 17.30 hours on Ist July, as compared with 121,460 kW. the previous year, an increase of almost 6 per cent., as against an increase of 3 per cent, for the previous year. The combined system maximum demand, which includes the Dunedin City Corporation plants and other auxiliaries, was 153,914 kW. at 12.00 hours on Ist October, representing an increase of 7-8 per cent, compared with the previous year's figures of 142,734 kW. and 5-98 per cent, respectively. Generation details of complete interconnected system (compared with 1945-46) are as follows :

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Year ended 31st March, 1947. Year ended 31st March, 1946. Station. Maximum Kilowatts. Units generated. Annual Load Factor. Maximum Kilowatts. Units generated. Annual Load Factor. Arnold Dobson (oil) Coleridge Highbank Monowai Waitaki 3,200 38 j 980 28,500 6,600 67,980 22,511,800 3,268,240 142,279,330 109,113,090 28,689,050 342,237,950 Per Cent. 80-3 41-8 43-7 49-6 57-5 3,250 41,800 26,000 6,600 68,000 23,093,200 377,400 133,015,560 37,281,630 24,599,300 358,588,820 Per Cent. 81-0 36-3 16-4 42-3 60-2 Departmental totals Dunedin City (all stations) Invercargill City Kanieri Electric Co. .. Westland Power, Ltd. Others 648,099,460 93,900,243 1,576,090 5,398,140 2,023,200 2,324,005 576,955,910 101,108,211 35,900 5,348,440' 1,371,040 89,422 Grand total 753,321,138 j 684,908,923