Heavy-duty Powerhouse MHE-Demag Cranes Lift Turbine with Ease

MHE-Demag Malaysia secured a contract to supply two 150t/25t/5t x 18.7m double-girder powerhouse cranes and one 25t x 5m double-girder semi-portal crane for the Hulu Terengganu Hydroelectric project, to lift the main turbine for maintenance and repair works.

The Hulu Terengganu Hydroelectric Project involved the development of a 250MW hydropower plant upstream from the existing Kenyir Hydroelectric Power Plant on the Terengganu River. Upon completion, the Hulu Terengganu Plant was expected to add an annual energy output of 405GW to the national power grid.

The project was undertaken by renowned specialists in the building of hydroelectric dams – the Alstom Group and SMEC, a consulting engineering firm based in Australia. The Project included a key design which was a 300m underground water transfer tunnel linking the main water catchment area in the north known as Puah Dam.

It was a challenging task to install cranes inside the tunnel. MHE-Demag’s project engineers visited the site and carefully planned the delivery of the cranes with one objective in mind – to execute the crane installation in compliance with all safety regulations imposed by the main contractors.

The girders and other components were transported to the site with a trailer truck. Due to severe limitations in manoeuvrability, the truck needed to move in reverse for approximately 300 metres to enter the site. A heavy-duty mobile crane was used to lift the crane girders, main hoists and auxiliary hoists. The installation took a few days, and despite all challenges both cranes were successfully installed and load-tested without any complications.

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