FIELD: electrified railway.
SUBSTANCE: invention can be used to reduce induction effect of electrified railways onto adjacent communication lines. Protective effect and cancellation of electromagnetic interference are provided by additional adjustable source of cancellating current. Proposed device includes series-connected generator and amplification control unit connected to second controlled input of adjustable current source by means of which, by changing gain factor at second controlled input, value of cancellating current is additionally changed periodically at maximum value in return wire. Operation of device to reduce induction effect is based on use of properties of oscillating systems with parameters periodically changing in time. At additional periodical changes of value of compensating force, additional damping is provided by system including oscillating circuit formed by return wire and ground, protected line and feedback circuit.
EFFECT: provision of conditions for maximum current for cancellation of interference signal and parametric stabilization of system.
1 dwg
