DEVICE FOR PROTECTING MINE ELECTRIC EQUIPMENT AGAINST THERMAL DAMAGES

摘要

This invention relates to protection of mine electric equipment against thermal damages. Purpose of invention û increasing reliability and sensitivity of the above device. The thermocable 1 parallel connected to the diode 12 is installed at the usingactivity. At the protected using activity temperature elevation the thermocable 1 resistance will reduce. It provokes shunting of the relay 2, which will switch-off disconnecting with its contacts 5 the contactor's 7 drive. The power supply will be removed off the protected using activity.