Brief description

The unloader is a bridge-type grab ship unloader designed by Wuxi Gongli engineering machinery plant for Shanghai Electric Power Co., Ltd.Yangshupo power plant.

Mechanical parameters of the unloader: rated hoisting weight is 12.5t, rated productivity is 500t/h, maximum productivity is 600t/h, rated hoisting speed is 80m/min, unload hoisting speed is 120m/min, cart rated speed is 150m/min, carrier rated speed is 27m/min, cart seaside stroke is 35m, landside stroke is 8m. Hoisting height is 13m over the carrier track and 5m under the carrier track.

The electrical parameters of the unloader: machine power 6KV, cable drum power supply, transformer DYn11 800KVA 6KV/0.4KV, hoisting support, motor switching: 160KW 380VAC, cart motor: 2 x 30KW 380VAC, pitching motor: 90KW 500VAC, carrier motor: 12 x 4KW 380VAC

Solution

HITE integration is used as the electrical control system. The transmission module uses ABB ACS800 series ISU multi-transmission product. PLC uses SIEMENS S7-400 series and S7-300 remote I/O series product. PLC communicates with speed regulator by PROFIBUS-DP, exchanging data in the speed at maximum 12Mbps and fully monitoring the working status and detail information of the speed regulator. PLC communicates with CMS  and touch screen by 10/100M industrial Ethernet to construct the monitoring management system which real-time monitors the system working condition, provides complete fault information and make the running and maintenance easier.