These buildings are part of a former short-circuit test laboratory. The laboratoy was built in 1936 by KEMA and at the time, it was the biggest short-circuit labs in the world.
The short circuit laboratory comprised several buildings: a machine building (B16) where the current and voltage were generated, a command building (B14, the front building in this model) where the tests were commanded and observed and the actual test building (B15, the rear building in this model). You can still see the explosion-proof windows at the back side building B14.
The buildings were designed by H. Fels and R.A.L. Schoemaker and after the war, G. Hamerpagt continued the 'Nieuwe Haagse School' style of architecture. #High_voltage_laboratory