POWER CABLE SAFETY DEVICE FOR WINDMILL POWER UNIT Russian patent published in 1999 - IPC

FIELD: wind-power engineering. SUBSTANCE: safety device has sides of interacting disks made as annular helical surfaces to form alternating left- and right-hand screw pairs; cable twisting angle is found from formula β = π•n+π, where h is number of turning disks. In this way, angle of head turn and return to neutral position in absence or weakening of wind is enlarged. EFFECT: improved efficiency and reliability of plant. 2 dwg