OJSC «Rosterminalugol», the town of Kingisepp, Leningrad region.

Automatic control system for car retarders used at non-public railway tracks. The system is designed for detection and stop of cars that spontaneously come uncoupled, thus ensuring safety in case of running-off of cars which reduces the risk of train accidents and, consequently, stoppages in production. Axle counting sensor «CCO-ASC» controls and measures the wheel set speed of car truck before retarders. Depending on the speed of cars the automatic control system makes calculation of opening time and brake release time of retarder, thus providing for running of car truck into released retarder with its subsequent retract to avoid the wheel set “pushing out” out of retarder. The scope of automation activities includes two tracks with retarders and track section vacancy control based on axle counting system «CCO-ASC». Galvanic isolation and lightning protection of interconnecting channels are provided by means of control boards «PU-RI» (CJSC «ASC» manufacture). Control is executed both from local control board and automatically with display of retarders condition at operator workstation.