AuCom has many years experience with electronic soft start, and has a proven reputation within the pumping industry for reliability and engineering quality. In an international tender process, they selected AuCom ahead of its competitors for three good reasons:
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Instead of stepping through to full voltage and subjecting the pump and motor to damaging electrical and mechanical stresses, AuCom soft starters shut the plant down safely.Įxtensive motor and system protection features make AuCom soft starters the obvious choice for such a critical application:įrom the outset, the Eurotunnel engineers knew they needed to work with an experienced supplier who could guarantee maximum reliability. Start monitoring prevents damage to the pump if it stalls or jams.The soft starter ramps down the voltage supplied to the motor, causing a gentle decrease in pump and fluid velocity. Soft stop prevents water hammer, avoiding the possibility of serious damage to pipework.Reduced current levels during starting reduce voltage disturbance which is important for weak or limited supplies.Voltage disturbances, jammed pumps and fluid hammer could all bring this vital transport link to a standstill.ĪuCom soft starters offer important features which keep the tunnel running smoothly: Water is drained from the tunnels by large submersible pumps, and reliable operation is critical - there are more than 200 train movements in each direction every day.Įurotunnel engineers sought a high-quality solution to control all pumping processes during excavation. The Eurotunnel system consists of two rail tunnels, each 31 miles long, and a smaller service tunnel. Soft starters were first selected to drain water during construction, and are still used to ensure smooth operation of this tunnel. Case Study: Dewatering the Channel TunnelĪuCom soft starters have been used since the 1990s to drain water from the Channel Tunnel linking Great Britain to Europe.
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