HS2 - Westgate LV Switchgear, Temporary TX and Cast-in Busbar (Sub-subcontract Package)

The Sub-subcontractor shall provide a complete installation of the HV Commissioning Supply Transformer and housing, associated HV Circuit Breaker, LV Switchgear, PFC units and Cast Resin Busbar for the Westgate Vent Shaft Asset (Project).

11kVar HV Transformer & HV Switch

The Sub-subcontractor shall supply, install, test & commission the 11kVar Commissioning Power Supply Transformer and associated HV Circuit Breaker generally as identified on the Commissioning Power Supply Schematic Drawing and within the MEP Particular Specification and Equipment Data Reports.

The Transformer and HV Circuit Breaker shall be delivered to site in accordance with the programme requirements & positioned by a specialist plant movement company under the control of the Sub-subcontractor.

PLC SYSTEMS

The Sub-subcontractor shall Design, supply, test & commission the PLC system generally as identified on the LV Schematic Drawings and within the MEP Particular Specification and Equipment Data Reports.

The PLC system shall be located within Switchboard SB-LV-A-01. It shall control the operation of the Incoming Supply and Busbar link ACB's to both Main Switchboards (SB-LV-A-01 & SB-LV-01-B) to ensure they can never be dual feed.

PFC UNITS

The Sub-subcontractor shall Design, supply, install, test & commission of the Power Factor Correction (PFC) units generally as identified on the LV Schematic Drawings and within the MEP Particular Specification and Equipment Data Reports

The Power Factor Correction Units are remote units and are required for the following Switchboards,

LV Switch panels

The Sub-subcontractor shall Design, supply, install, test & commission the LV Switch panels generally as identified on the LV Schematic Drawings and within the MEP Particular Specification and Equipment Data Reports.

There are 6 no. Switchboards, and they are as follows,

CAST-IN RESIN BUSBAR

The Sub-subcontractor shall Design, supply, install, test & commission of the Cast Resin Busbar System as generally as identified on the LV Schematic Drawings and within the MEP Particular Specification and Equipment Data Reports

The Cast Resin Busbar carries the Electrical supply from the Rail Services Transformers to their associated Main LV Switchboards. There is an interlinking Cast Resin Busbar between the Main LV Switch panels.