Upgrading of main drive of section mill 710.
Our company’s engineers have completed activities on upgrading the main drive of section mill 710.
The scope of works included development of detailed design documentation, manufacturing and delivery of equipment, electric installation work and equipment adjustment.
As part of the equipment supplied, the 4000 A power rectifier sections, developed and manufactured at our enterprise, were used for the first time, which made it possible to reduce the number of cabinets and simplify a power rectification circuit. Instead of three automatic current-limiting switches, that were originally planned to be used, only one such switch was left in the power circuit. A comb busbar of the anchor chain was simplified too.
SINAMICS DCM modules were used for control of the power sections. The complete exciter by «Siemens» was used as an exciter. The automation cabinet, based on PLC SIMATIC S7-300, was manufactured to perform control of the mill. The operator panels ТP1200 were installed on a front wall of the automation cabinet and at the operator’s control station.