rikkekaitseks kasutatav ja põhiisolatsioonile lisaks rakendatud iseseisev isolatsioon
independent insulation applied in addition to basic insulation, for fault protection
independent insulation applied in addition to the basic insulation, in order to provide protection against electric shock in the event of a failure of the basic insulation
Supplementary insulation is included in addition to basic insulation when safety ground is not present in a power supply. An example of supplementary insulation is the plastic case of an external power supply.
