https://abs.twimg.com/emoji/v2/... draggable="false" alt="⚑️" title="High voltage sign" aria-label="Emoji: High voltage sign">Overhead lines, OLE or & #39;wires& #39;...

https://abs.twimg.com/emoji/v2/... draggable="false" alt="❓" title="Red question mark ornament" aria-label="Emoji: Red question mark ornament">We get a lot of questions on what that means, how do they work and how long it takes to fix etc.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘" title="Thumbs up" aria-label="Emoji: Thumbs up"> Here& #39;s a thread which we hope will be useful to passengers.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧡" title="Thread" aria-label="Emoji: Thread">Thread #DelaysExplained
https://abs.twimg.com/emoji/v2/... draggable=Overhead lines, OLE or & #39;wires& #39;...https://abs.twimg.com/emoji/v2/... draggable="false" alt="❓" title="Red question mark ornament" aria-label="Emoji: Red question mark ornament">We get a lot of questions on what that means, how do they work and how long it takes to fix etc.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘" title="Thumbs up" aria-label="Emoji: Thumbs up"> Here& #39;s a thread which we hope will be useful to passengers.https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧡" title="Thread" aria-label="Emoji: Thread">Thread #DelaysExplained" title="https://abs.twimg.com/emoji/v2/... draggable="false" alt="⚑️" title="High voltage sign" aria-label="Emoji: High voltage sign">Overhead lines, OLE or & #39;wires& #39;...https://abs.twimg.com/emoji/v2/... draggable="false" alt="❓" title="Red question mark ornament" aria-label="Emoji: Red question mark ornament">We get a lot of questions on what that means, how do they work and how long it takes to fix etc.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘" title="Thumbs up" aria-label="Emoji: Thumbs up"> Here& #39;s a thread which we hope will be useful to passengers.https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧡" title="Thread" aria-label="Emoji: Thread">Thread #DelaysExplained" class="img-responsive" style="max-width:100%;"/>
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ—Ό" title="Tokyo tower" aria-label="Emoji: Tokyo tower">Overhead line equipment – OLE – is the wiring and other equipment you can see above electrified railway lines. They look similar to electric pylons you see across the country.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="⚠️" title="Warning sign" aria-label="Emoji: Warning sign"> Our overhead wires carry 25,000 volts of electricity to power electric trains.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ”‹" title="Battery" aria-label="Emoji: Battery">
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ€”" title="Thinking face" aria-label="Emoji: Thinking face"> OK - so I know electricity powers my train and how it’s carried, but HOW does my train get power from the overhead wires above it?

A Pantograph!

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘‡" title="Down pointing backhand index" aria-label="Emoji: Down pointing backhand index">Scroll belowhttps://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘‡" title="Down pointing backhand index" aria-label="Emoji: Down pointing backhand index">
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸšƒ" title="Railway car" aria-label="Emoji: Railway car"> A pantograph is fitted on the roof of electric trains. It acts like a spring and pushes a conductive "head" onto the underside of overhead lines.

This allows electricity to flow into the train. https://abs.twimg.com/emoji/v2/... draggable="false" alt="⚑️" title="High voltage sign" aria-label="Emoji: High voltage sign">
https://abs.twimg.com/emoji/v2/... draggable="false" alt="😑" title="Pouting face" aria-label="Emoji: Pouting face"> Delays occur when a problem affects the overhead wires or train equipment, requiring us to either slow down or stop services.https://abs.twimg.com/emoji/v2/... draggable="false" alt="😫" title="Tired face" aria-label="Emoji: Tired face">

The disruption can be caused by just some of the following:https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">
https://abs.twimg.com/emoji/v2/... draggable= Delays occur when a problem affects the overhead wires or train equipment, requiring us to either slow down or stop services.https://abs.twimg.com/emoji/v2/... draggable="false" alt="😫" title="Tired face" aria-label="Emoji: Tired face">The disruption can be caused by just some of the following:https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">" title="https://abs.twimg.com/emoji/v2/... draggable="false" alt="😑" title="Pouting face" aria-label="Emoji: Pouting face"> Delays occur when a problem affects the overhead wires or train equipment, requiring us to either slow down or stop services.https://abs.twimg.com/emoji/v2/... draggable="false" alt="😫" title="Tired face" aria-label="Emoji: Tired face">The disruption can be caused by just some of the following:https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">https://abs.twimg.com/emoji/v2/... draggable="false" alt="⬇️" title="Downwards arrow" aria-label="Emoji: Downwards arrow">" class="img-responsive" style="max-width:100%;"/>
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ”Œ" title="Electric plug" aria-label="Emoji: Electric plug">Power supply failures.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="🌬" title="Wind blowing face" aria-label="Emoji: Wind blowing face">https://abs.twimg.com/emoji/v2/... draggable="false" alt="🌲" title="Evergreen tree" aria-label="Emoji: Evergreen tree">High winds blowing the overhead wires out of alignment, or vegetation onto OLE.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸš‰" title="Station" aria-label="Emoji: Station">The train’s equipment due to a faulty component.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ¦‰" title="Owl" aria-label="Emoji: Owl">Birds landing on the equipment and causing a short circuit.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="β˜€οΈ" title="Sun with rays" aria-label="Emoji: Sun with rays">Extreme heat causing the wires to expand and sag
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ€”" title="Thinking face" aria-label="Emoji: Thinking face"> Problems trigger an alert in our control centre of an electrical & #39;trip& #39; advising us to investigate.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="⚑️" title="High voltage sign" aria-label="Emoji: High voltage sign">https://abs.twimg.com/emoji/v2/... draggable="false" alt="❌" title="Cross mark" aria-label="Emoji: Cross mark"> If necessary, electricity is turned off while the cause of the "trip" is investigated. This can potentially take up to an hour depending on location. Not a quick job!
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘·β€β™‚οΈ" title="Man construction worker" aria-label="Emoji: Man construction worker">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘·β€β™€οΈ" title="Woman construction worker" aria-label="Emoji: Woman construction worker"> Engineers arrive out on site and begin repair, usually in a specialised MEWP (Mobile Elevated Work Platform) that allows us to work quickly at height.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="😫" title="Tired face" aria-label="Emoji: Tired face"> If the wires have fallen down, the solution is more complicated and a lot longer to resolve.
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ”Œ" title="Electric plug" aria-label="Emoji: Electric plug">https://abs.twimg.com/emoji/v2/... draggable="false" alt="βœ…" title="White heavy check mark" aria-label="Emoji: White heavy check mark"> We then switch the electricity back on, services are restored and electric trains are able to run as normal.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="⏱" title="Stopwatch" aria-label="Emoji: Stopwatch">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ”§" title="Wrench" aria-label="Emoji: Wrench"> Due to the nature of the repair work, it can take some time for services to recover and return back to normal.
https://abs.twimg.com/emoji/v2/... draggable="false" alt="❓" title="Red question mark ornament" aria-label="Emoji: Red question mark ornament">How can we prevent OLE failures?

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸš…" title="High-speed train with bullet nose" aria-label="Emoji: High-speed train with bullet nose">https://abs.twimg.com/emoji/v2/... draggable="false" alt="🍌" title="Banana" aria-label="Emoji: Banana">The New Measurement Train, A.K.A & #39;Flying Banana& #39; regularly takes measurements of the OLE, while travelling at speeds of up to 125mph.https://abs.twimg.com/emoji/v2/... draggable="false" alt="😳" title="Flushed face" aria-label="Emoji: Flushed face">

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘·β€β™‚οΈ" title="Man construction worker" aria-label="Emoji: Man construction worker">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘·β€β™€οΈ" title="Woman construction worker" aria-label="Emoji: Woman construction worker">Any faults detected are picked up and fixed by engineers before there’s an issue.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘" title="Thumbs up" aria-label="Emoji: Thumbs up">
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ’‘" title="Electric light bulb" aria-label="Emoji: Electric light bulb">One of the most recent innovations we’re using is a pantograph camera.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ“·" title="Camera" aria-label="Emoji: Camera">

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸš…" title="High-speed train with bullet nose" aria-label="Emoji: High-speed train with bullet nose">They’re mounted on top of passenger trains and our engineers review the footage to check for faults in the OLE.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ–₯" title="Desktop computer" aria-label="Emoji: Desktop computer">

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ€—" title="Hugging face" aria-label="Emoji: Hugging face"> Pretty cool!
https://abs.twimg.com/emoji/v2/... draggable=One of the most recent innovations we’re using is a pantograph camera.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ“·" title="Camera" aria-label="Emoji: Camera">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸš…" title="High-speed train with bullet nose" aria-label="Emoji: High-speed train with bullet nose">They’re mounted on top of passenger trains and our engineers review the footage to check for faults in the OLE.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ–₯" title="Desktop computer" aria-label="Emoji: Desktop computer">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ€—" title="Hugging face" aria-label="Emoji: Hugging face"> Pretty cool!" title="https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ’‘" title="Electric light bulb" aria-label="Emoji: Electric light bulb">One of the most recent innovations we’re using is a pantograph camera.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ“·" title="Camera" aria-label="Emoji: Camera">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸš…" title="High-speed train with bullet nose" aria-label="Emoji: High-speed train with bullet nose">They’re mounted on top of passenger trains and our engineers review the footage to check for faults in the OLE.https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ–₯" title="Desktop computer" aria-label="Emoji: Desktop computer">https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ€—" title="Hugging face" aria-label="Emoji: Hugging face"> Pretty cool!" class="img-responsive" style="max-width:100%;"/>
https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ”‹" title="Battery" aria-label="Emoji: Battery">Each OLE delay is different – but we do everything we can to fix it as quickly, and as safely as possible.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="😀" title="Face with look of triumph" aria-label="Emoji: Face with look of triumph"> We know delays are frustrating and we do everything we can to avoid them.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘" title="Thumbs up" aria-label="Emoji: Thumbs up">Thank you for bearing with us while we get you moving again.

https://abs.twimg.com/emoji/v2/... draggable="false" alt="πŸ‘‰" title="Right pointing backhand index" aria-label="Emoji: Right pointing backhand index"> https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/delays-explained/">https://www.networkrail.co.uk/running-t...
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