POWER SUPPLY.

Press, Volume LXVII, Issue 20251, 1 June 1931, Page 13

POWER SUPPLY.

BjptESS WITHSTAND* || BY PLANT. - : " SIpiNG COMPLETION. IBbiptjon of station. to the Diesel power ataHK&jriteltoii, which houses the to augment supply from Hnujft; Coleridge power station, imB|Bleiie with the progress made igHpjt installation of the. equipment ■HSmtstiTely short space o£ time. nfflKply' in January when a start &MM»Vith the preparation of-the BHpPtt'was towards the end of that ■Kb the first of the plant came then it is evident that HHnbui been -lost, and when one ■HHUmplieated character of the the hundred and one. |HHHbnrks ffie* ; marvel i HHBbtiba' is so .near to com"SflfflHKfgh no . official statement; |V|jjjHHus to the exact date ■■Kly before the end'of state of things at giving much, if feel more at ease ■■■ft 'ftation is providing j* jpraminent feature in aSr has been erected HHJHH ||t $s a wooden frame HMRHH [[jdieet iron walls, and ja designing station building, machinery. sinking?' of the faundaH|HM|Sig are two overhead each with a lifting HHHplpk'' There' is a crane -engine .and genera■flHw' transporter to enable made for the ex- j southwards for i ■HHHWA'tfcree additional units, i ■JHflHmgKnt, at Penrose, near fc units,' each unit conDiesel engine., flHHHKftpeeial bigb speed suba output of HHHBgmeed of 800 revolutions HfIHMMKt coupled to a genera' HHHMtpeity of 1800 k.v.al,' the HHSHHraShrered it 11,000 volts. jHHHHngjieitjr of the . station, - size of the engines HHHHNKtarimin, as well as their HHHKed from the fact that Q. wide, an/1 German submarines ot these engines. 'ctaft, were and is all of engine pra^-

Exhaust pip.es from each,engine run outside the , building to - specially constructed concrete chambers, of which thera are, three j the final chamber-is carried -by a vertical pijfe well up. into the air. - This provision should' ensure that there- will be no' exhaust noises when the. engines are running. .

Fuel Arrangements. The oil for fuel purposes is brought from a tqnk op the reclaimed land by a'6-inch' pipe to the Department's tank, close to the power station. This tank has a capacity of 5Q,00(> gallons. From this tank the oil is pumped into two fuel oil tanks inside ihe building, and from them the fuel gravitates to 'the -engines direct.. A special small tank is provided to contain a. lighter grade ?f j fuel oil to. be used to ensure easy starting. The fuel-oil is atomised and . in- ( jected into the "Cylinder* by means of compressed air. ' Lubricating oil is pumj.cd through the engines by 50 h.p. motor-driven pump.. When taken,from the .tanl: the oil is pnmpcd through a codler, and then to all- parts oi! the- engine, including the. piston-lieads; which are on-cooled. When the oil has circulated' it drains;baek into the lubricating oil-tank. The lubricat- ' ing tank for the No. 8 set is in posl, i'tion; the other three, which are being made in Christcliurch, vill be' delivered shortly. For^the purification of the lubricating oil two spffltfial purifiers are provided. The oil is filtered on the by- [ pass system.' Water;for the purpose of cooling the; engines and compressors'will be pumped from the' harbour at a point in the vicinity of'the-Harbour Board's pumping station at the dock, and conveyed to the power station by-two 10-iiich pipes. .To -provide for : flre and other emergencies, there is an auxiliary supply; from the" Lyttelton Borough Council's mains. To provide current for the motors operating the lubricating oil pump?, the water cooling system,- and ; the, lighting ol the power station,, a. bank of 451> k.v.a. transformers is being installed. ; * "i *

„ TJ» Switchgear, Thp 11,000 volt switchgear, - which already is in position, is of the b truek type. It provides the means for connecting any of the generating: Bets to the pair of special feeders . misgoa line), being contracted between

Lyttelton and Christchurch, and also the .means of synchronising .the generating sets with the Lake, Coleridge system.

Transmission Line. * Tbo> construction of the special duplicate line from the Diesel station is wellunder way. The poles over the crest of the . Port ■ Hills have been erected and some of the wiring already has been strung. The" line should be comploted w'thin a fortnight. The line- is of heavier construction' than the original line over the hills, • this being necessitated by the heavier load, it will carry. The- insulators are of the suspension type. The original transmission, line will permit of a .limited amount of power from the station supplied, to tho ( Lalie Coleridge system, but to cope with the total output of the station the new line referred to has had to be constructed.. Some .of the power will be f absorbed by . the JLyttelton Borough Council and > bv the Lyttelton, Harbour Board, and, on'tlio City side of the hills, at Woolston by the railways, and by the City and Heathcote, county systems. The new-line-will be completed in anipte timo to cope with the total output, from the Diesel station. '