DEVICE OF PROTECTION OF SUBMERSIBLE REMOTE MEASUREMENT Russian patent published in 2011 - IPC H02H9/04 

FIELD: electricity.

SUBSTANCE: device comprises a throttle (1) and a capacitor (2), which form an LC-filter, a reed relay (3), the first output of which is connected to an anode of a diode (4), and the second output is connected to the throttle (1) and a cathode of an additional diode (5). The cathode of the diode (4) is connected to the first output of a charging resistor (6), the second output of which is connected to an anode of the additional diode (5) and to the first output of the resistor (7), included into a voltage divider made of resistors (7), (8) and a capacitor (9). The second output of the resistor (7) is connected to the input of a threshold device (10) and to the first outputs of the resistor (8) and the capacitor (9), the second inputs of which are connected to the ground. The second output of the throttle (1) is connected to the first output of the reed relay winding (11), to a cathode of a limiting stabilitron (12) and to the first output of the capacitor (2). The second output of the capacitor (2) and the anode of the limiting stabilitron (12) are connected to the ground. The second output of the reed relay (3) winding (11) via an electronic key (13) is connected to an input of a controller of a submersible remote measurement unit. The threshold device 10 output is connected to a control input of the electronic key (13).

EFFECT: increased accuracy of power circuit elements insulation resistance measurement.

3 cl, 1 dwg