Differential - ALLTRONIC SEMIS T33 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
WARNING: make sure that the equipment is connected correctly to the input neutral, or else
damages to the UPS may be caused.
The neutral regime is modified only in presence of an isolation transformer or when the UPS operates with a neutral
isolated 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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