Australasian Mining Review
Issue link: http://ebook.aprs.com.au/i/37922
213 CSE - uniserve The mining industry faces many challenges in the running of its operations on a day to day basis. As large consumers of electrical energy these challenges include not only the amount of power used but also the power quality. P ower Conversion, being the controlled conversion of the supply electrical power through to the stringent requirements of the mechanical and process engineers, encompasses a number of issues to be considered, including:- • power usage effi ciency and energy savings • mechanical torque control limitations • reduced current impact on power supply during starting • reduced harmonic generation • increased power factor • optimised process handling and speed control • maximum availability • minimal maintenance For more than 30 years CSE-Uniserve has been a proud supplier to the Australian and global mining industry, with the range of products and solutions provided by the CSE-Uniserve Power Conversion team helping to meet these challenges, including:- • LV and MV variable speed drives • Air cooled and liquid cooled solutions • Active and passive harmonic fi ltering • LV and MV soft starters • Customised panel solutions • Liquid resistance starters • High effi ciency MV motors Whilst these products directly relate to the Power Conversion process, CSE-Uniserve can take this further, to the protection and monitoring of the total power solution for the mine site. CSE-Uniserve Power Conversion – Newcrest Mining Cadia East Project A recent solution based CSE-Uniserve Power Conversion project has been Newcrest Mining Limited’s, Cadia Valley Operations, Cadia East Project, near Orange in NSW, where CSE-Uniserve has been successful in implementing the design and supply of Liquid Resistance Starters and Low Voltage Variable Speed Drives, along with the site wide MV Protection and Load Shedding scheme. Liquid Resistance Starters Working closely with Fluor Australia Pty Ltd as the appointed program management contractors on the project, CSE-Uniserve has supplied a total of six Liquid Resistance Starters for the underground crusher (2 x 650kW) and above ground conveyor (355kW, 500kW, 560kW and 630kW) applications. CSE- Uniserve’s project involvement is also expected to include the on site commissioning works scheduled for late 2011. The supply of the LRSs on this project reinforces CSE-Uniserve’s strong and long standing relationship with Newcrest Mining’s Cadia Valley Operations where it has successfully supplied numerous LRSs over the many development phases of the mine for a variety of applications including SAG and Ball Mills, Vertimills, Crushers and Conveyors. CSE-Uniserve has also recently supplied and commissioned a Liquid Resistance Starter for one of the world’s largest dual pinion ( 2 x 8000kW) Ball Mill applications for the Cadia East project. Liquid Resistance Starters are ideally suited to these typical mining applications through their ability to provide high starting torque with low starting currents. CSE-Uniserve’s totally stainless steel design and fabrication ensures their long term operation with minimal maintenance for installation in harsh environmental locations. Low Voltage Variable Speed Drives and Soft Starters Building upon its considerable prior experience at Cadia East, CSE-Uniserve was awarded the contract to supply Low Voltage Variable Speed Drives and Soft Starters for the Low Grade Plant Upgrade. The drives supplied are all from Fuji Electric’s feature- rich MEGA series. [Power Conversions, Variable Speed Drives and Automation Solutions] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _