(N)TSCGECEWOEU MT BMH PLUS
Tunnel boring machines (TBMs) represent some of the most electrically demanding and mechanically extreme operating environments on Earth. A typical hard-rock or mixed-ground TBM operates in a pressurized, confined underground chamber where hundreds of kilograms of electrical cable snake around reeling drums, hydraulic power systems, and high-frequency motor drives operating at medium voltage (6/10 kV). The electrical environment is noisy with harmonic distortion from variable-frequency drives; the mechanical environment is brutal, with cables flexing repeatedly as they wind and unwind from rotating drums at speeds up to 20 metres per minute.



