The maintenance shed is a term usually applied to the facility where rolling stock are serviced. A rail network would usually have more than one maintenance shed and may have specialty sheds. Specific activities are performed in specialty sheds such as wheel grinding, bogie replacement or programmed maintenance.  Reactive maintenance is often performed in stabling yards. Sheds may also be of the one-stop-shop type where all activities are performed.

The main lever in the driver's cabin that supplies more traction power to the wheels.

A master station sends controls to (and receives indications from) a number of interlockings. Master stations are typically used in any distributed interlocking system, especially centralised traffic control systems.

See also remote field stations.

A panel simulating the geographical layout of a railway points system in which small indicator lamps display the state of the circuits or signalling system.

Large modern control rooms may now use video projection of the VDU screens to show train positions.

A railway signal has various states, one of which is the most restrictive state. This is often the red aspect (or a horizontal semaphore arm) which means "stop" or "danger".

But because not all signals have a stop or danger state, the best term is "most restrictive" e.g. some signals have only caution or proceed states.

Signals are designed that if they fail, they will fail to their most restrictive state (fail safe).

Mean Time Between Failures

This is the expected time between failures of a system during operation.

MTBF can be calculated using the mean (average) time of expected system rcomponent failure.

Negative 50V—the negative side of 50V DC which is powered or supported by a battery back-up or UPS.

See also B50—the positive side of 50V DC.   

A condition of receiving government training funds is that Registered Training Organisations (RTOs) report a range of information such as the courses and subjects in which learners are enrolled, their age and gender and where training is occurring.

This information is used at both a national and state/territory level to develop a picture of the vocational education and training sector in Australia, inform policy decisions, allow reporting of what has been achieved with public funds and assist future planning.

Reporting requirements may change as government policy changes. While every effort is made to minimise changes to reporting requirements, it is sometimes unavoidable. Be sure to keep up to date with changes in reporting requirements.

For more information on the reporting requirements in your state or territory, please contact your local state or territory training authority.