With its Siemens 6SE70 multi-drive equipment more than a decade into service, discontinued and increasingly difficult to support, Ningbo Steel worked with DUCHENG and Hopewind to install, commission and place HD2000 replacement equipment into service during a planned maintenance window.
Much of the auxiliary-drive equipment on Ningbo Steel's hot-rolling line used Siemens 6SE70 multi-drive systems. After more than ten years in service, component aging and fault-related downtime had become growing risks. The product series was also discontinued, making spare parts increasingly difficult to obtain.
The objective: a controlled replacement within the existing system constraints
DUCHENG formed a dedicated engineering team and worked through several rounds of review and practical simulation with Ningbo Steel's electrical specialists. The selected path used Hopewind HD2000 inverters while minimizing changes to the existing control program and cabinet arrangement.
Why the HD2000 was selected for this project
Installation and return to service
On October 17, 2024, engineers from DUCHENG, Ningbo Steel and Hopewind used the planned maintenance window to remove the old equipment, install the replacement and complete commissioning. The system entered service, providing an engineering baseline for further auxiliary-drive localization.
A replacement path must be verified against the load, communications, cabinet, protection logic and site testing. The compatibility and cost figures above belong to this project record and are not general commitments for other installations.
