Differential - ALLTRONIC SEMIS Série Manuel D'installation

D
IFFERENTIAL
THE INPUT NEUTRAL IS CONNECTED TO THE OUTPUT NEUTRAL THE DISTRIBUTION SYSTEM THAT POWERS THE
UPS IS NOT MODIFIED BY THE UPS
CAUTION: make sure that the equipment is connected correctly to the input neutral, or else damages to the
UPS may be caused.
The circuit neutral is only affected if an isolating transformer is present or the UPS is operating with the neutral
disconnected upstream.
DUAL INPUT versions: the neutral for the input line and bypass line are shared inside the device.
A single differential switch must be fitted upstream of the point at which the line divides to supply the trip switch-
protected rectifier and bypass inputs for the UPS. See following diagram:
PARALLEL versions: In order to prevent false activations where several machines are connected in parallel, a
single differential switch should be fitted upstream of the entire system. See following diagram:
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