COCD is applied for reducing the quantity of used relays in the system from 28 to 11 on the deemed centralized track switch.
The microprocessor-based interlocking system EC-EM with functions of COCD was placed in service on station Molodezhnaya of juvenile railway (Oktabr’skaya railway) in June 2011 and transfer to full time service in 2013.
In 2014 was placed in service station Viritsa with control of all switch motors and signals by COCD. Also on this station was implemented interface connection with digital modules of track circuits control and coding DM TCC of NPP “Stalenergo” which allowed reducing the quantity of relay equipment in these circuits. COCD consist of three channels in operation and logical parts and power part with backup possibility.
The features of COCD are:
Applying of contactless hardware components for monitor and control of outdoor equipment.
Reducing the amount of design and commissioning works.
Resistance to atmospheric and commutation overvoltage which is confirmed by test report in test center VITU.
Depth diagnostic of outdoor equipment condition (control of temporary operation parameters, integrality of power circuits and insulation resistance, control of presence voltage fluctuations and so on).
Depth diagnostic of COCD hardware with precision up to module and communication line.
Cabinet COCD can provide the monitor and control of 32 single switch motors (with possibility of sequential control several motors) or 160 filament signals (traffic lights, LED, light-optical systems) without power backup. It is possible to combine the monitor and control of switch motors and signals in one cabinet COCD. Constructively PSD, OCD and COCD are executed based on unified crates with fixed modules by height 3U, 6U and depth 220 mm, integrated in separate cabinets with overall sizes (WхDхH) 600х800х2000 mm. The switching of cabinets connections OCD and COCD with facilities (relay, outdoor equipment) is realized via cross and input-protective cabinets. Input-protective cabinet provides the protection of semiconductor devices from atmosphere overvoltage according to RZD JSC standard STO 08.024-2015.