DEVICE FOR WARNING ABOUT DANGEROUS APPROACH TO CURRENT-CARRYING PARTS OF ELECTRICAL INSTALLATIONS Russian patent published in 1995 - IPC

Abstract RU 2042996 C1

FIELD: safety engineering. SUBSTANCE: signal across storage capacitor 13 connected through resistor 9 to output of NOT gate 7 reaches level triggering warning unit after several charge pulses following at supply mains frequency and duration determined by one-shot multivibrator 6. So, device operates under action of industrial-frequency electric fields only and is immune to static electricity charges reaching antenna due to rubbing against clothes. EFFECT: improved reliability in operation. 2 cl, 2 dwg

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RU 2 042 996 C1

Authors

Kozyrevich I.S.

Semchenko A.A.

Dates

1995-08-27Published

1990-09-25Filed