QCLNG Upstream Project HV&LV Commissioning

Project Overview

QCLNG is a world first project to turn gas from coal seams into Liquefied Natural Gas (LNG), which will be pumped via an underground 540km long pipeline, to a plant at Curtis Island near Gladstone for export. The project is underpinned by massive sales agreements with a range of Asia-Pacific countries and is estimated to increase Queensland’s gross state product by up to A$ 32 Billion in the first ten years of operation.

Scope of Work

With a formidable record of outstanding achievements in a range of high voltage operations, EnerMech was tasked with the high voltage testing of a number of key substations, varying in size from 33kV to 132kV. Further to initial testing and energisation, EnerMech were also responsible for secondary testing and SCADA (supervisory control and data acquisition), post-energisation and online testing.


High Voltage Testing

EnerMec ’s involvement formed a vital role in ensuring the project was operational and delivering the first export of LNG on time. With this consideration, a team was selected that involved over 50 highly experienced staff including Project Managers, Commissioning Engineers , E&I Superintendents, Testing Technicians, Electricians, Instrumentation Technicians, Completions and Quality Assurance Engineers.

This team completed an extensive range of high voltage testing services on all systems including Generation, Transmission and Distribution systems, transformers, switchboard/MCC switchboards, Ring Main Units, Harmonic Filter Units & Power Factor Correction Units, Variable Speed Drive, automated and manual secondary injection (with GPS time synchronizing capability), cables and circuit breakers. Thermo-graphic imaging was also performed along with current testing and power transformer testing.


The testing projects were completed for Thiess on time, on budget and without incident. EnerMech significant contributions to the project were recognised by our clients and other key QCLNG stakeholders, such as Rob Harris from QGC “From a QGC HV Operations point of view EnerMech  have continually delivered great, top grade work”.

To read more about our achievements on this project you can check out our blog

Evening shot of LNG refinery