ABB control system raises productivity for cable manufacturer

An ABB control system is increasing productivity, lowering waste and reducing energy costs for UK cable manufacturer.

British Cables Company (BCC) in Manchester, UK, replaced the control system on two insulated cable-making lines resulting in a 29 per cent increase in the number of reels produced during an 8-hour shift. The new system controls the wire tension and maintains the correct drawing diameter as the wire is pulled through an extruder, while running at an increased speed of 1800m/min.

The company was unable to source spare parts for the original control system. This resulted in frequent breakdowns costing over £60,000 per annum in lost production. Restarting the system added a further £38,000 per annum in engineering costs. The original control system was slow to respond, setting up the machine to produce a new colour of cable often resulted in several false starts, resulting in wire snapping and up to 10,000m of scrapped cable.

The new ABB Compact HMI SCADA system, supplied, installed and commissioned by ABB's Engineering Centre in Coalville, UK, controls two ABB AC500 programmable logic controllers (PLCs) on each line. The PLCs are linked by ProfiNET to five ABB variable speed drives (VSDs), rated between 4kW and 60kW, each of which control the speed of ABB AC motors. In addition, a smaller ABB VSD is used to control the positioning of the water trough that cools the extruded wire. Upgrading the motors and drives has reduced energy costs by £16,000 a year across the two lines.

This control system now triggers cable colour changes on the fly by reducing the machine speed to 200m/min during the changeover. This has resulted in an 80 per cent reduction in waste. Additionally, safety of the production line is improved as guards are electrically controlled and rotating equipment is electrically interlocked. This prevents the safety guards from being opened while the line is running.

James Glenn, business improvement team leader for BCC says: "We have exceeded our goal of running the lines at 1,600 metres a minute. The engineering detail we can get from the system shows exactly what stage each machine is in - and the speed of everything on the lines. Installing the two systems has achieved over £60,000 in extra production due to the higher line speed."

Learn more about the ABB Compact HMI SCADA system at www.abb.com.

ABB Automation Technologies (Instrumentation & Automation)

Howard Road
Eaton Socon
St Neots
PE19 8EU
UNITED KINGDOM

+44 (0)1480 475 321

enquiries@gb.abb.com

www.abb.com

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