North Middlesex University Hospital LV Electrical Infrastructure


Healthcare profile - North middlesex hospital HV infrastructure_1.0 - Copy (3)

The project involved an extension of the existing internal Hospital HV ring via a new HV radial connection to serve two new 1250kVA transformers, as part of a combined energy centre. The transformers configured on a N+1 configuration such a single transformer would serve the most critical sections of the LV network.

The new transformer were provided to serve a Women and Children’s unit, new main chiller plant and part of the existing Hospital LV network.

Elementa liaised with UKPN and carried out a HV coordination study to coordinate the protection settings of the existing transformers on the HV network.

The project also included providing 100% LV backup supply via three synchronised 1250kVA (Prime rating) / 1375kVA (Standby rating) emergency generators, as part of the combined energy centre. The generators were configured in a 2N+1 configuration and synchronised to the UKPN main supply upon the supply restoration.

The project also included diverting of sections of the existing LV network and replacement of existing sub main cables and switch panels, in agreement with the Hospital department to minimise any disruption to a live Hospital.

Elementa liaised with the Trust estates department to survey the Hospital’s available plantroom and riser space, to propose options to enable the diversions within the existing LV network.

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