400 kV Thames Crossing

400 kV Thames Crossing
The Kent tower
The Kent tower
Location
CountryUK
Ownership information
OwnerNational Grid plc
Construction information
Commissioned1965
Technical information
TypeHigh-level overhead line
Type of currentAC
AC voltage400 kV

The 400 kV Thames Crossing is an overhead power line crossing of the River Thames, between Botany Marshes in Swanscombe, Kent, and West Thurrock, Essex, England. Its towers are the tallest electricity pylons in the UK.[citation needed]

The present crossing was built in 1965, and comprises two 190-metre (623 feet) tall lattice towers each side of the Thames. Some suggest that the choice of this height was deliberate, being just taller than the BT Tower in London.[1] The span is 1,372 metres (4,501 feet), the minimum height of the conductors over the river is 76 metres (249 feet). Each tower has three crossarms and carries two circuits of 400 kV three-phase AC.

400 kV power lines also cross the Thames at the Thames Cable Tunnel, the Dartford Cable Tunnel, and the London Power Tunnels.

132 kV Thames Crossing

There was at one time an earlier 132 kV crossing nearby, with towers 148.4 metres tall. Linking Dagenham and Crossness, it was built between 1927 and 1932 and was part of the Belvedere-Crowlands 132/33/25 kV double circuit.[2] With the cessation of generation at Belvedere Power Station, this line was dismantled in 1987.

2006 death

In March 2006, Paul Smith-Crallan attempted to BASE jump from a platform on the Swanscombe Tower. The parachute he was using is believed to have failed to open, causing him to plunge to his death. This tower is a popular base jumping location because of two platforms that provide good launch points.[3]

  • Detail of the Essex Tower
    Detail of the Essex Tower
  • Detail of the Kent Tower
    Detail of the Kent Tower
  • Aerial view of the 190 metre [623 feet] Kent tower and Queen Elizabeth suspension bridge.
    Aerial view of the 190 metre [623 feet] Kent tower and Queen Elizabeth suspension bridge.
  • View of the internal structure of the Kent tower.
    View of the internal structure of the Kent tower.
  • View of one of the Kent tower legs.
    View of one of the Kent tower legs.

See also

References

  1. ^ News, Greater London Industrial Archaeology Society, February 2003, archived from the original on 2003-03-08
  2. ^ Barry, Howard. "Power Over the Thames". Wonders of World Engineering (46). Amalgamated Press: 1321–1324. Retrieved 24 December 2014.
  3. ^ Kirby, Terry (2006-03-15). "Base-jumper killed in leap from 600ft electricity pylon". The Independent. Archived from the original on 2014-08-14.
  • News, Greater London Industrial Archaeology Society, December 2002, archived from the original on 2003-01-17
  • News, Greater London Industrial Archaeology Society, February 2003, archived from the original on 2003-03-08
  • Diagram of the towers, Skyscraperpage

51°27′44.06″N 0°18′21.19″E / 51.4622389°N 0.3058861°E / 51.4622389; 0.3058861

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