FITZROY RIVER WATER - GLENMORE WATER TREATMENT PLANT / Job No: #5369
The water treatment process involves a number of complex steps, and Fitzroy River Water regularly modifies its operations, to improve on delivery.
One such modification was the need for a new 810kW variable speed drive (VSD) for the Pump Set No 4 at Glenmore Water Treatment Plant (GWTP). The pump in question is known as a Make-up Pump, as it makes up the peaks and troughs in demand for water supply to the region.
Recognising that the existing VSD for Pump Set No 4 required an upgrade to meet current standards in reliability, Fitzroy River Water called for project tenders. The work to be undertaken included: detailed design and documentation; demolition and removal of the existing VSD and cubicle; manufacture and installation of the new system; as well as testing and commissioning of the entire electrical installation.
Siemens Ltd proved successful in their tender, and to ensure all customer requirements were met, they liaised closely with Fitzroy River Water. They selected and designed the VSD unit, subsequently issuing it to MPA for installation into a cubicle. Required to power an 810kW 415V pump motor, Siemens determined that the most suitable drive for this application was a 900kW VSD from their Masterdrive range. The oversized drive was selected, in order to cope with the maximum ambient temperature of 50°C realised within the water treatment plant. Connecting the VSD and motor, were cables from the Siemens Protoflex range. These fully screened, EMC compliant cables, are suitable in damp, wet conditions, as well as for outdoor use.
Designed and manufactured by MPA, the resulting cubicle was approximately 4,000mm long x 2,300mm high x 1,500mm deep, including the cooling ducts at the rear. Divided into three sections, they were partitioned to allow airflow between them, and contained air vent holes to assist in the general movement of air inside the cubicle. Manufactured from 2mm zinc sheet steel, the cubicle was powder-coated and mounted on a galvanised channel plinth.
