MAB-U MICROPROCESSOR BASED AUTOMATIC BLOCKING

MAB-U – a system of train separation and assurance of train operation safety at single-track and multiple-track railway spans on a real-time basis. It can be used as an autonomous system (based on the components of MPC-U) or as a function integrated into MPC-U.

It assures remote control of facilities at a span (signals, a railway crossing, track circuits, coding of track circuits, etc.) and coordination between stations limiting this span.

It is implemented based on track circuits. The equipment is located at stations adjacent to the span or in transportable modules (ТМ) at the span.

Main functions of MAB-U

• monitoring integrity and vacancy of block sections of a span;
• monitoring sequence of occupying and vacating block sections with automatic blocking when there is a violation;
• controlling signals of intermediate traffic signals with observation of traffic safety conditions;
• controlling crossing, tunnel signalling;
• coding track circuits of block sections with signals of ALS;
• implementing an algorithm of three-digit or four-digit signalling (depending on customer’s requirements);
• real-time displaying (at ARM DSP and ARM ShN) reliable information on train position and state of the signalling devices at a span.

MAB-U equipment for Stanishevka-Zhytomyr Span

Technical characteristics of MAB-U

Displaying a span at ARM DSP