GEAR FOR DETECTION OF FAULTY WITH CURRENT LEAKAGE TO GROUND IN THREE-PHASE NETWORK WITH INSULATED NEUTRAL

摘要

The invention relates to electrical engineering. The device put D-trigger information and the effluent having inputs coupled and connected to an amplitude selector and a clock input - to the clock pulse shaper and shaper clock. Log inputted shaper connected to the output D-trig- ger and the inputs of the AND gates - NO, and output - with the combined second inputs of the RS-flip-flops, the outputs of which are connected to the clock inputs of D-flip-flops. In the data inputs of flip-flops is supplied On T. logic OR gate output is connected to a data clock input, and an input - to the output of I, and also with the point connecting the output O-trigger input clock pulse shaper additional inputs and logic elements I. The apparatus introduced differentiating element with a limiter at the output of the transformer secondary winding connected to an amplitude selector and the OR gate. The invention allows using only one of the phase relations between the phase voltages and the zero sequence voltage with high accuracy driver signals with information about the presence of the faulty phase 2 Id