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 01 March 2005
Working at a high level in Denmark
Jens Erik Stubkjaer, Otra Danmark A/S Sonepar Nordic
From the top of a suspension bridge in Denmark, Jens Erik Stubkjaer has a magnificent view of the Great Belt dividing east and west Denmark, as well as of the roadway lying 200 meters below. But what is an Otra Danmark A/S employee doing up there?
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As an electrical engineer and expert on high voltage overhead line transmission systems with 37 years of experience, Jens Erik has a unique skills set in the Danish market. Otra Danmark A/S has a special Power and Networks department with expertise in the utility market.
Jens Erik Stubkjaer, well known for his long experience and vast expertise in the area of electric power utilities, was asked to help investigate the damage to steel wires on the Great Belt Bridge. Transmission lines are subject to strong impact from wind, which can cause vibrations in the conductors and earth wires connecting the transmission towers. These vibrations can result in metal fatigue at the points of suspension and, in the worst case scenario, to conductor breaches. Special equipment called vibration dampers are used to control the vibrations and their impact. Later on, the steel wire will be repaired and vibration dampers will be installed according to Otra Danmark A/S specifications.
Succeeded operation!
Facts about the Great Belt Bridge:
The bridge, which was inaugurated in 1998, connects eastern and western Denmark. It consists of an 18-km low bridge and a 6,800-meter high bridge. The high bridge includes a suspension bridge with a 2,700-meter span, 1,624 meters between the pylons, which measure 254 meters, and 65 meters of free sailing height underneath the bridge.
The aforementioned steel wires are safety guards mounted on the main cables that carry the suspended part of the bridge. They enable inspection and maintenance of the main cables.
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