The Victorian Government has mandated the rollout of Rapid Earth Fault Current Limiter (REFCL) installations across nominated Zone Substations in AusNet Services’ network, including at the Lilydale Zone Substation. Installation works included:
- Two new REFCL(s) units in bunds and footings
- Two new 22kV switched neutral bus kiosks onto new footings
- A new REFCL Room on to new pad footings to house associated inverters and control equipment
- A new modular Control Room onto new striped footings
- A new cable trench (600mm Wide x 600mm Deep) running north west to south east for associated control cables Conduits for control cables
- Associated reinstatement and surfacing
Replacement works involved:
- The existing NER with one new NER onto new pad footing
- Existing station service transformers (SSTx) with two new 750 kVA kiosk type units onto new pad footings and AC changeover boards
- Both existing Capacitor Banks with Metal enclosed Cap Banks with pad footings for REFCL compliance.
The Heywood Terminal Station (HYTS) 500 kV CB Replacement project includes establishment of two new 500 kV switch-bays to convert the incoming MOPS and TRTS line bays to a double-switched arrangement.
Multiworks was engaged by Zinfra to carry out all civil work associated with the project scope, including:
- Replacement of existing MOPS/TRTS line bay ROIs, CVTs and Surge Arresters
- Replacement of M1 and M2 transformer 500 kV Surge Arresters
- Decommissioning of 22 kV No.3 station services transformer
- Replacement of the 415 V station services infrastructure
- Installation of new 500kV Bus protection, new X & Y CBM scheme
Among other elements, Multiworks was engaged by Zinfra to construct a new 50,000L containment tank within the existing electrical substation.
Due to its size and weight, the containment tank was required to be constructed in-situ. Multiworks utilised prefabricated formwork boxes to set-out the tank and pour its 3 compartments in a singular pour.
Multiworks’ works onsite involved all civil works related to the contract for the new MTM Cheltenham Substation. Included within these works were building bored piers (600Ø 3.6m deep), Overhead 1500 Switch Feeder bored piers (900Ø 10m deep), Overhead 22Kv (900Ø 10m deep), Undertrack bore x3, conduit trench installation, Building concrete slab, Transformer bay Concrete slab and Brickwork, Security fencing and gates.
All works were completed ahead of program whilst working under the site conditions and restrictions imposed from the interaction with the public and under live rail conditions. PTV commended Multiworks on the management of the Cheltenham station car park (public & vehicle interaction) whilst the retaining wall and the changes to the carpark were completed.
Due to patronage growth on the Melbourne tram network, the Victorian Government ordered 50 new trams, known as E‐Class trams, to supplement the existing fleet. These trams have a higher passenger capacity, additional on‐board features and increased electrical requirements that will contribute to the modernisation of the network. As a result, substantial upgrade to the power supply infrastructure was required including the subject works at Brunswick Substation.
Works involved demolition, exposure of redundant cables, installation of conduits and foundations, new drainage systems, landscaping and the treatment/ removal of all waste as Contaminated Cat C. The work was undertaken in a methodical sequence as the sites was incredibly confined.
Engaged by CPP directly, Multiworks was responsible for the construction of the in-situ brick control building at Deer Park Terminal station – constructed to house the site’s new electrical high voltage equipment. Multiworks was responsible for the installation of all related services including security, HVAC, lighting and fire detection. Despite a two-month delay associated with the building permit, Multiworks achieved handover of the completed building in time for testing and commissioning by the original project deadline. Multiworks was awarded additional scope including fencing and earthing works.
Following the award of the Mentone Zone Substation Multiworks secured the delivery of refurbishment works at the Noble Park Zone Substation. The similarities between the two projects enabled Multiworks to capitalise on available economies of scale and to resource both jobs efficiently. The project works included:
- Construction of a 22kV Control Room
- Significant infrastructure works
- Considerable installation of conduit runs
- Resurfacing & reinstatement of roadway.
The Mentone Substation is situated on a site with significant space constraints. Multiworks successfully managed refurbishment works, including:
- Construction of a 22 kV Control Room including a cable basement
- Major upgrades to existing site buildings
- Construction of a 220kV transformer enclosure
- Over 700 lineal meters of trenching and conduit installation
- Installation of an environmental drainage system.
Multiworks successfully completed 95% of works at the new Cranbourne Zone Substation two months ahead of schedule. This was achieved despite 45 days lost due to wet weather.
Project scope involved:
- Construction of new heavy-duty access roads capable of carrying the load of the new transformers
- Benching of new substation site with 22,000m3 of fill and compact to 98%
- Construction of over 400m3 of reinforced concrete foundations for new primary plant and buildings
- Installation of conduits
- Installation of environmental runoff tank and bund walls to radiator foundation
- Installation of new septic tank
- Construction and installation of asphalt roadway, kerbing and bollards.
Sims Metal Management (SMM) is engaged in the processing, handling and shipping of ferrous scrap metal. Multiworks were engaged by Sims directly to construct the new static shear infrastructure all whilst the site maintained its operation.
The scope of works included:
- Electrical conduit installation and re-route of existing services
- Static Shear slabs and plinths (approx 250m3 concrete, 25T of steel)
- Construction of a new Pump Room inclusive of precast panels, suspended slabs, structural steel platforms and all associated roofing/ plumbing
- Installation and commissioning of new fire services
- Installation and fit-out of static shear mechanical equipment
