Rampion features 116 MHI Vestas 3.45 MW turbines. The turbines are made up of an 80 metre (m) tall tower, a nacelle for the generation equipment, a hub, and three 55m long blades. When vertical, the tip of the turbine blade reaches 140m, which is just taller than the Brighton i360’s viewing pod at its top height.
The turbines sit on top of foundations, comprising single steel monopiles and bright yellow transition pieces, designed so they integrate together perfectly. There are 12 rows of 10 to 12 turbines that are connected by array cables taking the power to a single offshore substation. A total of 140 kilometres of array cables are buried in a network under the seabed. Laid end to end, the array cables would stretch from Brighton to London and back.
The wind turbines generate power at 33 kilovolts (kV) and the main role of the offshore substation is to transform this up to 150kV, to reduce any losses as it is transmitted to shore. The 2,000 tonne structure houses the electrical components at the heart of the wind farm including transformers, switchgear and control systems. It sits on a four-leg jacket foundation, fixed into the seabed and weighing around 900 tonnes.
Electricity will be transmitted from the offshore substation along two 16km subsea export cables, which come to shore at the beach, next to Brooklands Pleasure Park in East Worthing.