CONVEYORBELTS

REFERENCE 1

Coal unloader in New South Wales’Upper Hunter Valley (Australia)to supply Australia’s largest coalelectricity generator.

The power station relies on coal suppliesfrom nearby mines (now depleted) or rail via the Ravensworth Coal Unloader.

15 million tonnes p.a.

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• Master w/Speed Controller – 900kW• Torque Follower w/Speed Limit – 900kW• Speed Follower w/Torque Limit – 900kW

Big conveyor (5km long) driven by:

Shorter conveyor (500m long) driven by:

• Single Drive – 500kW

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All drives are supplied usingRegenerative Units for• regeneration• better harmonics

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• One located at the rail unloader station for the 500kW drive (which powersthe shorter conveyor) and for the 900kWdrive at the tail of the belt

• One for the two 900kW drives whichpull the belt overland

Two switchrooms:

Settings for Master-Slave OperationDrives on top of the belt

Analog Outputs Menu andMotor Configuration Menu

MASTER:

P177 AO1 -> Displayed Quantity Selection 10:Torque Demand

P182 AO1 -> Minimum Value 0.0V

P183 AO1 -> Maximum Value 10.0V

C011 Type of Reference Speed

SLAVE:

C011 Type of Reference Torque

both inverters:

C008 Mains Voltage 6T Regen

C010 Control Mode FOC

C016 Rated Speed 1488rpm

C017 Rated Power 900kW

C018 Rated Current 890A

MASTER / SLAVE

REFERENCE 2

El Abra (Chile) - open-pit copper mining complex at 2400 meters above sea level.•  3 conveyor belts, capacity: 2400 tons each; length 50 m•  motors: 375kW, 400Vac, 50 Hz, 1500 RPM• Inverters: Sinus Penta 0831-4T.

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