The Czechoslovak energy sector development was massively triggered after the Second World War. To meet such goals it was decided to build up two laboratories - a High Power Laboratory and a High Voltage Laboratory. Thus the High Voltage Laboratory as a part of EGU (The Elektroenergetic Institute) was established.
HV Laboratory consists of two connected buildings. An administration building with offi ces, workshops and maintenance units in one half. The second half is occupied by a Small testing room connected directly to a Large testing hall with floor dimensions of 24×30 m and 27 m in height. An unique so called „A" profi le is well know and visible away from large distances.
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