Brands & Equipment
High- and low-voltage drive systems across brands, serviced by one engineering team. Manufacturer authorizations and partnerships are group records held by named Ducheng companies — listed with holder, scope and validity on the credentials page.
Brands we've serviced
- —ACS800 fleet maintenance — Hangzhou Iron & Steel converter plant, drives 7–12 years in service
- —ACS800 multi-drive system — 450 t ship-unloader retrofit, Taizhou Power Plant
- —ACS800 drive system — bearing test bench, Shanghai Electric Central Research Institute
- —DCS800 DC drive — emergency recovery of a fire-damaged, discontinued unit on Dingsheng New Material's 17# rolling mill; 120+ days of stable operation after repairProject record
- —ACS6000 medium-voltage drive — emergency IGCT-failure repair for a customer in Inner Mongolia, reached 2,000+ km away overnight
- —S120 — full maintenance cycle on 43 drives, Shiheng Special Steel section mill
- —S120 multi-drive — rolling-mill main-drive upgrades with PCS7 program optimization, Rizhao Steel
- —S7-300 / S7-400 / S7-1500 PLC systems — ladle, stockyard and emissions-control automation
- —6SE70 replacement experience — Shagang converter-tilt drives replaced with S120, a 7-day job completed in 4 days
- —SM150 medium-voltage drive — seven-year maintenance cooperation, second full maintenance round completed in April 2025Project record
- —PROFIBUS → PROFINET network upgrade — Shagang EAF and ladle-furnace PLC systems with 45 remote stationsProject record
- —S7-200 / MODBUS RTU communication — published engineering practice from the DUCHENG knowledge archiveProject record
- —Modicon Quantum 140 PLC — full electrical control retrofit of a 450 t ship unloader, Taizhou Power Plant
- —Hopewind HD2000 — localization replacement of aging Siemens 6SE70 auxiliary drives on Ningbo Steel's hot-rolling lineProject record
- —Inovance Technology — technical-service cooperation seminar and production-base visitProject record
Fault-code support routes. Mainland China users can use the WeChat service account; overseas sites can submit the brand, model, code and site evidence through the multilingual website form.
Project recordOEM relationships
Partners & brands worked with
OEM parts supply for line instrumentation
Alongside drive service, DUCHENG supplies genuine spare parts published in its integration catalog — mechanical and process spares for Primetals (VAI) equipment, and thickness-gauge components for Thermo Fisher, Honeywell and Rayonic systems: ray tubes, high-voltage sources, sensors, shutter assemblies and control boards.
Published equipment scope
- — High- & low-voltage variable-frequency drives
- — Industrial motors
- — UPS systems & DC panels
- — Soft starters, voltage & speed-regulation equipment
- — PLC & automation systems — S7-300 / 400 / 1500, PCS7, Quantum
- — Thickness gauges & line instrumentation parts
A brand not listed here? Send the nameplate.
Send the drive brand, model, fault code and nameplate photo — an engineer reviews every request.