SUBMERSIBLE TELEMETERING EQUIPMENT PROTECTIVE DEVICE Russian patent published in 2007 - IPC H02H7/08 H02H9/04 

FIELD: submersible telemetering systems for oil-extraction pump plants.

SUBSTANCE: proposed device has choke 1 and capacitor 2 forming LC filter 3, as well as reed relay 4 that functions to open circuit on occurrence of overvoltage across device input, its first lead being connected to anode of diode 5 and to first lead of high-rating resistor 6, and its second lead, to series-connected choke 1 of LC filter and to reed-relay keep-alive coil 7. Cathode of diode 5 is connected to first lead of charging resistor 8 whose second lead is connected to first lead of reed-relay making coil 9 and to first lead of storage capacitor 10 whose second lead is connected to common wire. Second lead of high-rating resistor 6 is connected to control lead of electronic switch 11 and to first lead of time-setting capacitor 12 whose second lead is connected to common wire. Second lead of reed-relay making coil 9 is connected to input of electronic switch 11 whose output is connected to common wire.

EFFECT: enhanced reliability of protective gear, reduced size of submersible telemetering equipment unit.

1 cl, 1 dwg