HVDC Pole 2 thyristor valve hall at Haywards in the New Zealand HVDC Inter-Island scheme, during a maintenance shutdown
<a href="//commons.wikimedia.org/wiki/User:Marshelec" title="User:Marshelec">Marshelec</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>