Depending on the location of the drive, the standards define four
categories distributed in two environments.
• First Environment: Domestic installations. It also
includes premises directly connected to a low-voltage
power supply network without an intermediate
transformer which supplies buildings used for domestic
purposes such as shopping malls, cinemas, hospitals…
• Second environment: Industrial installations. Second
Environment includes all plants other than those
directly connected to the public low-voltage network
which supplies buildings used for domestic purposes,
e.g. factories and those other premises supplied by
their own dedicated transformer.
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