Pantograph positioning system

A positioning system for a pantograph, the positioning system comprising:

• a contact strip configured to be fastened to a pantograph and to contact a power line, the contact strip equipped with a wear detection circuit configured to be supplied a fluid;
• a main valve including a pilot chamber and a secondary chamber, which are separated by a membrane, the main valve defining an outlet aperture fluidly connected to the secondary chamber, the membrane movable between a closed position, in which the membrane blocks the outlet aperture, and an open position, in which the membrane does not block the outlet aperture, allowing evacuation of the fluid from the main valve to the atmosphere;
• a supply line configured to be fluidly connected to a fluid supply unit and to supply the fluid to the secondary chamber of the main valve;
• at least one feeder line configured to be fluidly connected to the fluid supply unit and to feed the fluid to the pilot chamber of the main valve;
• and
• a detection line that extends from the pilot chamber of the main valve to the wear detection circuit of the contact strip.