FIELD: protection of wire communication lines.
SUBSTANCE: proposed device is connected not to grounded shielded wire compensating for magnetic component of contact system electromagnetic field, but directly to communication line through differential transformers, and it provides open circuit made from ground at both sides. Communication line not connected to ground is under action of electric (capacitive) component of electromagnetic field. Proposed device changes communication line from induced magnetic component conditions into induced electric component conditions and decreases its value by supplying compensating voltage equal to induced voltage with shift of 180 el. Degrees into communication line. Proposed device contains phase regulator, regulated source, voltage transmitter responding to changes of amplitude and phase of voltage of influencing contact system and source internal resistance regulator unit.
EFFECT: provision of protection of communication line from dangerous and interference influences of contact system at reduced cost of equipment.
1 dwg
