Substation equipment

Tender description

The project relates specifically to the upgrade of the existing High Voltage and Low Voltage Electrical Services associated with the upgrade and replacement of the existing Gassiot House Substation SS2 at St Thomas Hospital. These works form part of the ongoing development and improvement works current programmed by the Trust as part of back-log maintenance and is some cases to meet the increased electrical demands of Capital Projects. To aid in the trust in making its decision there will be 3 options to be considered and three pricing documents to be completed: — Option 1: is to retain the 2 existing 750 kVA HV transformers and only replace the LV switch gear, — Option 2: is to replace the 2 existing 750 kVA HV transformers with new 750 kVA transformers and the LV switchgear, — Option 3: is to replace the 2 existing 750 kVA HV transformers with new 1000 kVA transformers and the LV switchgear. Depending on which option is adopted, the project shall include the provision of: 1) new main LV switchboard TX.1-TX.2; 2) new Temporary panel board. Exact option is subject to development, once the Principal contractor has been appointed; 3) BMS interface joint boxes; 4) re-configuration, rationalisation and replacement of existing distributed switchgear equipment. A number of elements of builder’s works are required in order to facilitate the new upgrade works as follows: 1) demolition and re-positioning of Transformer room wall to increase space in existing LV room; 2) enlarging transformer room doorway to facilitate future replacement of new transformer; 3) demolition and rebuilding of substation doorway brick wall bund.