METHOD OF ACCELERATED BREAKER FAIL PROTECTION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC H02H3/05 

FIELD: electricity.

SUBSTANCE: according to the method, a turn-off signal is applied to the control input by the feeder breaker, at the same time the delay timer is started. By means of the tripping memory unit, the nature of the signal from the response sensor is analyzed and, if the signal from the tripping memory unit is not received during the timer's delay time, a signal is sent to turn off the redundant circuit breakers. A response sensor is used with a means for monitoring the passage of the position mark located on the drive element of the breaker, the displacement of which is one-to-one connected with the displacement of the pole of the breaker. The sensor receiver is fixedly attached to the breaker case and by means of the memory unit a signal is generated at the input of the control by the feeder breaker in case where the estimated speed of the sensor mark movement is equal to or greater than the set point, and the memory unit is started on the front of the switching off signal.

EFFECT: as low as practicable response time of the breaker fail protection.

3 cl, 2 dwg