Siemens Power Transmission and Distribution (PTD; Erlangen, Germany) is delivering a turnkey 400-kV/132-kV substation with gas-insulated switchgear to Dubai as part of further expansion of the power-supply system of the United Arab Emirates. The Emirate of Dubai is one of the fastest-developing regions in the world.

The substation will link the H Station at Al-Aweer power plant to the country's power-supply network. The substation also completes the Emirates National Grid (ENG) by providing a link between the power plant and the power-supply system of Abu Dhabi. Startup of the system is planned for the beginning of 2008.

The order, worth nearly 83 million euros, comprises the delivery of the substation, including 400-kV/132-kV switchgear; four 450-MVA power transformers (400 kV/132 kV); four 40-MVAR reactors (132 kV); cable systems for 400 kV and 132 kV; automation, control and protection systems; and an expansion of the network control system and telecommunications equipment.

Gas-insulated bus ducts (GIB) for 400 kV will be installed to connect the nearby switchgear in the H Station at Al-Aweer power plant complex, as well as to the high-voltage overhead transmission lines. The GIB links will have a total length of about 6 km (4 miles).

With 24 gas-insulated switchgear bays at a 400-kV voltage level and 28 bays for 132 kV, this substation is the largest of its kind that Siemens has delivered to date worldwide.