Track traffic power supply insulation of equipment monitoring devices

The utility model discloses a track traffic power supply insulation of equipment monitoring devices. It includes positive voltage input end L1+ and burden voltage input end L1 - - and earthing terminal L2, positive voltage input holds L1+ and burden voltage input end to connect return circuit of formation respectively behind a divider resistance, connects spacing resistance R9C1 between the output point A in return circuit and the ground point B of earthing terminal, and one -level isolating amplifier circuit of spacing resistance R9C1 parallel connection, spacing resistance R9C1 are still parallelly connected with a filter capacitance V9F1, and a second grade isolating amplifier circuit A8H1, second grade isolating amplifier circuit A8H1 output connection director are connected to spacing resistance R9C1's output. After adopting foretell structure, the voltage signal after enlargeing carries the controller to judge, finally detects out the state of insulation of equipment, automatic isolating detection circuitry when from this breaking down can protect follow -up circuit not receive the damage under the abnormal conditions, insulating monitoring problem when having solved the installation of track traffic power supply unit non insulated.