West of Groningen, on the Business Park westpoort, the offshore high-voltage substation 220 kV-Four leaving TenneT high voltage of 220,000 On the offshore high voltage station. is volts (220 kV) transformed to lower voltages and diverted from one to another high-voltage connection. Leave should be extended with the offshore high voltage station at four 380 kV-transformers and switchgear 220 kV line from now the Eemshaven is replaced by 380 kV. The extension means that the field is enlarged and redesigned with the new technical installation.