XMART Optima 3K-HB - Manual (Page 7)

USER MANUAL - OPTIMA UPS 1K-3K (ENGLISH)
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www.xmart-ups.com 1406-OPTIMA 1K-3K - 7
4. INSTALATION
WARNINGS FOR FULL BRIDGE MODELS: (1KF to 3KF) & (1KF-CN to 3KF-CN)
FULL BRIDGE MODELS: For all full-bridge models (1KF-3KF & 1KF-CN to 3KF-CN), It is not allowed to connect output Neutral line to
input Neutral line. This practice can damage UPS. This kind of damage is not covered by warranty.
FIG-1
FULL BRIDGE MODELS: For all full-bridge models (1KF-3KF & 1KF-CN to 3KF-CN) it is not allowed to connect output Neutral to
system Ground. This practice will generate internal damage in the UPS. In full-bridge UPS output Neutral is not same than input
Neutral so a floating voltage will be generated between N-G at output side of the UPS. This voltage is not harmful for your equipment
connected to UPS. If you need 0Vac in N to G for your equipment, please check recommendation of FIG 3.
HALF BRIDGE models allow connection of their output Neutral line with system ground (G).
FIG-2