East Anglia ONE


EMF Assessment


Figure 3. Development plan entailing most amount of cabling 2.2. Cable specifications


3. Array cabling is proposed to consist of 50Hz, dry or wet XLPE insulated, three-core alternating current designs, which have been used extensively at the majority of existing Round One and Two offshore wind farms. They will be rated between 33kV and 75kV, and measure between 104mm2 and 154.4mm2 cross- sectional area, depending on electrical load to be carried (see Appendices


Appendix 1 for typical design).


HVAC export cabling is also proposed to consist of 50Hz, dry or wet XLPE insulated, three-core alternating current designs. Cables will be rated between 132kV (825A current load and 1000mm2 cross-sectional area) and 220kV (825A and 1000mm2). Many existing wind farms utilise this design, but have generally been limited to 132kV; cables rated at 220kV have only recently been developed and are currently being applied for the Malta-Sicily Inter-connector (due in 2013). Alternatively, there is a small possibility that single-core cables, possibly laid separately but more likely close together in trefoil (a triangular formation), and rated at 275kV (also 825A and 1000mm2) will be used to connect the converter stations. The latter variation depends on cable and installation technology being suitably developed in time.


HVDC export cabling is proposed to consist of bipole, XLPE insulated or mass impregnated non-draining (MIND) designs (see Appendix 2 for typical design), most likely deployed bundled together, but possibly separated by 50m. Cables will be


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