There are available any sort of outlet protection devices for fine protection of user equipments against transient over voltage and to meet your needs in smartness forms.
Class D surge protection devices protect only the devices which are connected. If the buildings have B and C class protection devices then there will be no need D class protection devices. Unless there are very important devices in the buildings. In this case, B+C+D class protection devices can be used together. D class protection devices can provide effective protection alone in the places which have not risk so much.
