Derby Power Rectification

Overview The Bureau of Meteorology (BoM) is seeking a contractor to undertake an uplift of the electrical installation at its Derby Aero Automatic Weather Station (AWS). The estimated value of this work is $50,000.00. About An electrical audit completed at the Bureau's Derby Aero AWS site in 2019 identified that the electrical supply cables were not to specification. Derby Aerodrome has also had extensive power infrastructure works completed since March 2026, including an upgrade of the distribution board supplying the weather station. This work identified that the electrical supply cables to the weather station failed an impedance loop test. Objectives Satisfactory installation of electrical equipment facilitated by electrical works from the contractor in accordance with AS/NZS 3000:2018 and/or any other related Standards. Scope The scope includes installation of a new power run from the point of supply distribution board to a free standing local distribution board, distributing power to three instruments, including: Locating and determining the current mains power cable run from the distribution board to the AWS Locating and determining comms cable runs from all four weather instruments back to the AWS Excavating a trench to appropriate standards from the distribution board to approximately 3m short of the AWS where a free-standing local distribution board will be installed (exact position to be determined prior to work commencing), negotiating a water drain in between, with the contractor to advise the Bureau how this will be done to meet appropriate standards and specifications Supplying and installing appropriate conduit and cable from the distribution board to the free standing local distribution board located close to the AWS, with the exact location determined in conjunction with the Bureau prior to installation (expected to be approximately 3m from the AWS) Supplying and installing a local distribution board on a free standing post approximately 3m from the AWS, with a residual current circuit breaker with over current protection (RCBO) for three supply circuits (details in appendix) Excavating and trenching to appropriate standard from the local distribution board to the instruments requiring mains power (ceilometer, visibility meter and AWS), taking all precautions not to contact, interfere with or damage existing cabling in the ground Supplying and installing new outlets at the instrumentation, Clipsal 56 series switched socket outlet (or equivalent), ensuring outlets are IP rated for external use Removing the sub board from inside the AWS housing and replacing it with a four gang power outlet Removing the existing electrical cable from the AWS and terminating the cable in the existing pit, ensuring compliance with all standards Providing a declaration that the completed work complies with AS/NZS 3000:2018 Providing a Western Australian Certificate of Electrical Safety (CES) within 7 days of completing any safety and compliance test on an electrical installation Providing a markup of any changes to the supplied single line diagram Providing digital photos of completed work, including all details for switching components (main switches, surge diverters, circuit breakers, RCBOs, RCDs, etc.), all wiring entering the MDB, earth and neutral bars, and all earthing to the MDB housing chassis and MEN Ensuring any circuits fitted with RCBOs remain functional with no nuisance tripping, investigating any circuit that trips post installation to ascertain whether this is load type related or a cabling fault, and reinstating the circuit breaker if the trip is due to the type of load Contractor Requirements Submission of a Bureau Permit to Work (PTW) and Isolation Task Proforma (ITP), completed and returned to the Bureau prior to attending site Compliance with all WHS requirements, including submission of a SWMS/JSA to the Bureau prior to commencement of works Completion of a Bureau Induction Satisfactory completion of the electrical installation to Bureau requirements, inspected by the Bureau and confirmed by photographic evidence Completion of all tests required under AS/NZS 3000:2018 post works, with completion indicated by issuing a Western Australian Certificate of Electrical Safety (CES) within 7 days of completing any safety and compliance test on an electrical installation