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TN-S/TN-C/TNC-S/TT Earthing systems.
TN-S system: PE and N are separate conductors that are
connected together only near the power source.
TN-C system:a combined PEN conductor fullls the functions
of both a PE and an N conductor.
TN-C-S system: part of the system uses a combined PEN
conductor, which is at some point split up into separate PE
and N lines.
TT system with neutral conductor: the protective earth
connection of the consumer is provided by a local connection
to earth, independent of any earth connection from the grid.
IT system with neutral conductor: the electrical distribution
system has no connection to earth at all.
Voltage measurement Voltage measurement directly across the battery terminals.
The voltage drop across the battery cables is compensated
for. See +Bat/-Bat.
Winter mode Period in which the batteries are protected against low
battery charging.
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