| Company | AusGrid |
| Location | Sydney, Australia |
| Timeline | 2024 |
| Project Overview | Replace indoor wall mounted 132kV Disconnectors and Earth Switches located in four different transformer bays. This required four different engineered solutions from Insulect to cater for variations between the bays. |
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Ausgrid undertook a critical upgrade to replace ageing indoor wall‑mounted 132 kV Disconnectors and Earth Switches across four transformer bays in Sydney. Each bay presented different physical layouts and operational constraints, requiring carefully engineered, bay‑specific solutions rather than a one‑size‑fits‑all approach.
Insulect was engaged to manage the complete delivery of the project—from initial site assessment through to supply, testing, installation supervision, and ongoing support—ensuring the upgrade could be delivered safely, efficiently, and with minimal disruption.
The key challenge lay in the variation between the four transformer bays. Differences in layout, clearances, and existing infrastructure meant standard equipment could not be applied across the site. Each bay required a tailored engineering solution while still meeting Ausgrid’s technical, safety, and operational requirements.
In addition, all work was carried out within an operational substation environment, placing a strong emphasis on planning, coordination, and risk management to avoid unplanned outages or safety issues.
Insulect delivered four engineered solutions, each designed specifically for the individual transformer bay conditions. The project began with a detailed site inspection and assessment, allowing Insulect’s engineers to fully understand the existing installation and identify constraints early.
From there, Insulect managed the entire scope of works, including:
This end‑to‑end approach ensured all equipment was fully compliant, correctly installed, and seamlessly integrated into Ausgrid’s existing infrastructure.
The project delivered several key benefits for Ausgrid:
By addressing site‑specific challenges early, Insulect helped avoid delays and rework during installation.
The Indoor 132 kV Disconnectors Replacement project was successfully completed in 2024, delivering a modernised, reliable switching solution across all four transformer bays. The upgrade enhanced the long‑term performance and safety of Ausgrid’s substation infrastructure while meeting all technical and operational requirements.
The project demonstrated Insulect’s capability to deliver complex, customised high‑voltage solutions under live network conditions, reinforcing its role as a trusted partner for utility infrastructure upgrades.