ALLTRONIC SEMIS T33 Manual De Instalacion Y Uso página 116

THE UPS IUT NEUTRAL IS CONNECTED TO THE UPS OUTPUT NEUTRAL
THE DISTRIBUTION SYSTEM THAT POWERS THE UPS IS NOT MODIFIED BY THE UPS
The neutral condition is only modified if an isolation transformer is present or when the UPS works with a
neutral isolated upstream.
Make sure that the equipment is connected correctly to the iut neutral because as damage may be
caused to the UPS.