String. Relates to the accessibility of the transformer
Options: type = c("Type A", "Type B", "Type C", "Default").
A setting of "Type A" - Normal access.
A setting of "Type B" - Constrained access or confined working space.
A setting of "Type C" - Underground substation.
A setting of "Default" - Normal access thus same as "Type A"
setting (cf. table 214, page 164, CNAIM, 2017).