FIELD: instrumentation.
SUBSTANCE: device contains two transmitters of external magnetic field intensity, they are located on current lead of primary winding of the rectified transformer, and in current lead of rectifier load, respectively, two narrow band filters set to frequencies 2ω and ω, respectively, three comparators set to different actuation levels, logic elements AND-NOT and AND, indicators "break" and "breakdown".
EFFECT: increased reliability of device operation due to exclusion of the effect of position of the sensitivity axis of transmitter of the external magnetic field intensity, and to exclude possibility of false responses of the device.
1 dwg, 1 tbl
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