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4.3. coNNEctioN
4.3.1. to thE maiNs coNNEctioN, tErmiNals (X1 to X4)
as this is a device with class I protection against electric shocks, it is essential to
install a protective earth conductor (connect earth ( )). Connect the conductor to
the terminal
(X5)
, before connecting the power supply to the UPs input.
In accordance with safety standard en-IeC 62040-1, installation has to be
provided with a “feedback protection” system(e.g. a contactor) which will prevent
the appearance of voltage or dangerous energy in the input mains during a mains
fault (see Fig.18 and respect the wiring diagram of “feedback protection”.
There can be no deviation in the line that goes from the “feedback protection”
to the UPs, as the standard safety would be infringed.
Warning labels should be placed on all primary power switches installed in places
Fig.16: Front view for parallel system
Fig.17: Floor view for parallel system
