CONTACTLESS EMERGENCY LIGHTING AND COMMUNICATION SYSTEM WITH AXIAL PORTABILITY FOR UNDERGROUND MINES.

摘要

The present invention relates to a contactless emergency lighting and communication system with axial portability for underground mines. The said system comprising an aluminium conductor steel reinforced (ACSR) conductor (c) disposed as a bar primary of the system. The secondary winding is placed on the same core with an output voltage of 2.2-2.9V when a emergency lighting device situated at this said terminals connected though a magnetic switching wherein the said magnetic switch being ON generates flux in the core of the device due to low voltage current flow in the bar primary of the magnetic switching device when the secondary winding being situated in the same core induces secondary emf across the secondary coil for giving supply to the emergency lighting device (D) wherein LEDs are connected in antiparallel in order to protect from the Peak Inverse Voltage (PIV) which appeared across the LEDs due to 50 Hz AC supply.