ABB SafeRing Product Manual page 16

For installation of switchgear with Internal Arc Classifi-
cation AFLR with ventilation upwards through exhaust
channel, the following must be considered:
− Unit must be equipped with arc proof cable covers
− Unit can be installed as free standing
− Minimum height of ceiling: 2600 mm
− Recommended distance from back wall is 100 mm
16
*) 290 mm base frame is available as
option