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The system is fail-safe since, in the event of a loss of power, only the electro-magnet is affected and therefore all trains passing will receive a warning. The system suffers one drawback in that on single track lines, the track equipment will set the AWS system on a train travelling in the opposite direction from that for which the track ...
This is popular for early intermittent systems that used the presence of a magnetic field or electric current to designate a hazardous condition. [3] The British Rail Automatic Warning System (AWS) is an example of a two-indication cab signal system transmitting information using a magnetic field.
From 1956 the BR-designed Automatic Warning System (AWS) was installed. It was similar to ATC but relied on an induced magnetic field rather than an electric current and featured a visual indicator in the cab. The receiving system was installed on the Coronation class locomotives from 1959 onwards.
The TPWS system is used in: The United Kingdom, with AWS magnets and with short overlaps; Victoria, Australia, without AWS magnets and with full-length overlaps; Since 1996, an older variant of TPWS, called the Auxiliary Warning System, has been used by the Mumbai Suburban Railway in India, on the Western Line and Central Line.
A crocodile is a component of train protection systems used in France and Belgium.It works similarly to the Automatic Warning System (AWS) used in the United Kingdom.. The crocodile can provide two different pieces of information to the driver, according to the aspect of the corresponding signal:
The U.S. Consumer Product Safety Commission is warning about the danger of high-powered, pea-sized magnets found in toys, announcing one company's recall of a set containing them and saying it was ...
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