CIRCUIT FOR PROTECTION OF TELECOMMUNICATION INSTALLATIONS AGAINST OVERVOLTAGE AND OVERLOAD CURRENT Russian patent published in 2002 - IPC

FIELD: electrical engineering. SUBSTANCE: in proposed circuit for protection of telecommunication installations operation voltage of discharger 1 of protection against overvoltage is chosen higher than peak value of network voltage. Operation voltage of thyristor diodes 4, 5 is chosen insignificantly higher than maximum value of operational voltage of protected line and resistors 2, 3 are employed in the capacity of decoupling link and to limit maximum amplitudes of network voltage. EFFECT: provision for increased resistance to shock currents and reversible protection of lines. 2 cl, 1 dwg