High frequency electromagnetic interference at this site had been affecting electronic equipment within the Chemistry Building. Aging switchgear associated with the original transformer located in the basement was found to be causing the problem. The decision was made to completely upgrade the existing transformer which included alterations and additions to the main switchboard. The new transformer was located outside the building enclosed in a weatherproof kiosk. Cutting of the HV ring main cable and subsequent joining of new cables was carried out during the semester break, resulting in minimal disruption to the operation of the Universities commercial tenants. In summary the works included:
• Alterations to main switchboard room including second exit door & emergency lighting.
• Install, test and certify new earth mat.
• Supply and Installation of 1 x 1500 kVA kiosk transformer.
• Disconnect HV ring main cable from existing substation, join and terminate in new kiosk.
• Remove paving to allow for excavation & trenching.
• Re-instate paving including pathway edging, retainer wall and landscaping.
• Supply and installation of paralleled LV sub-main cables run from new kiosk to Chemistry building Main Switchboard including the installation of a new air circuit breaker for the Morris Miller Library