East Anglia ONE


EMF Assessment


Table 5. Predicted B field magnitude (µT) generated by EAONE OWF direct current cables (assuming no burial) 320kV*


500kV


Distance from cable


Bundled 50m separation


Cable surface A few thousand A few thousand 0.5m 1m 5m


≈175 ≈50 ≈1


10m ≈0.5


A few hundred ≈50


A few dozen Bundled 5000


≈500-600 250 ≈80* 2


*N.B. No data available therefore tentative assumptions and/or estimates made


Table 6. Predicted iE field magnitude (µV/m) generated by EAONE OWF direct current cables (assuming 1.2m/s tidal flow) 320kV*


500kV


Distance from cable


Cable surface 0.5m 1m 5m


10m Bundled


≈3500 ≈200 ≈50 ≈1.5 ≈0.5


50m separation Bundled 50m separation


≈4500 6500 7000 ≈700 300 1000 ≈400 ≈70 ≈30


≈70* 2


*N.B. No data available therefore tentative assumptions and/or estimates made ≈1* 60


<Slightly stronger <Slightly stronger


≈500* <Slightly stronger 100


<Slightly stronger <Slightly stronger


600kV* 50m separation


5000 800


<Slightly stronger <Slightly stronger


≈500* <Slightly stronger 82


≈1* 50


<Slightly stronger <Slightly stronger


600kV*


J3184 EAONE v2


15


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