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Commissioning of 150MVA, 132/11kV DLFF Substation

I had the privilege to be part of the commissioning team for one of the substations of Dubai Electricity and Water Authority (DEWA), namely Dubai Logistics Freight Forwarders or DLFF 132/11kV, 3x50MVA Substation. This means that now, the electrical energy for the whole city of Dubai has again increased.

The team composed of the Commissioning Engineer, Protection Engineer, Transmission Operator, SIEMENS contractor, and yours truly from the Distribution System Operation.

The scope included commissioning of gas-insulated switchgear (GIS) by SIEMENS; 2×132kV line feeder; 3×50MVA inter-distribution transformer feeder; and a double busbar including bus-section disconnectors and earthing switches; automation system is used for control and monitoring. The man-machine interface is the BAILEY SCADA by ABB.


After much thorough pre-commissing, proper inspection, functional testing of protective relays and circuit breaker control circuits to confirm that protective equipment operates as intended, including current and potential circuits, which are critical sensing inputs, the substation was officially commissioned at 1347H on Jan. 21, 2009.