I).—1

84

7fch to lltli and 24th to 25th Juno, 1926 ; 25th November, 1926 ; 7tli to 13th January, 30th January to Ist February, 4th to 7th and Btli to 21st February, sth to 13th March, 1927. Wanganui steam plant.—loth to 13th January, 3Jst January to Ist February, 4th February, 7th to Bth and 12th to 21st February, and 7th to 12th March, 1927. Palmerston North gas plant —7tli to 11th June, 1926 ; 10th to 13th January, 31st January to Ist February, Bth to 12th, 14th to 16th, and 19th to 20th February, and 7th to 12th March, 1927. During the periods when the above plants were running the power-station plant was, of course, running in parallel and supplementing the above plants when required. [11 the early hours of the morning the whole of the load was supplied from the Wellington steam plant, the department's machines charging the lines. During these hours power from the Wellington plant was therefore being transmitted as far as Wanganui and Napier. When it was necessary to run the steam plants, the loads between the fuel plants and the hydrostation were so adjusted that there was always sufficient water in the dams to supply the whole load for a day or two, in case of repairs being required for any plants, or other emergencies. It was necessary to ask the Power Boards to reduce their peak loads for one day only during a period of low flow. With this exception no restrictions have been placed on the Power Boards with regard to load, even in those oases where the Boards have exceeded the amount allocated to them. The maximum load to date is 20,040 kw., and the maximum number of units generated per week 2,007,180. The plant is therefore fully loaded on plant capacity, and overloaded by 25 per cent. 021 units generated. Tlie connected load 011 the system is analysed in Table li herewith. General. The whole system of transmission-lines and substations is now in operation, and all the oil circuit-breakers have been installed at the various substations. The map S. 62 shows the trans-mission-lines, substations, and the maximum load to date at each substation. The total length of 110,000 v. lines is 351 circuit miles, and there are eight substations and one switching-station 011 the system. The installation of the oil circuit-breakers and the replacing of the air-break switches has greatly improved the working of the system.

MANGAHAO SUPPLY SYSTEM 110,000 VOLTS S 62