LEGRAND NUMERIC HP i 33 40 kVA Series User Manual page 28

• Even with external power disconnected, residual electric charge might exist in the capacitance inside
the UPS. The output terminal bars may have high voltage which will result in safety hazard. It is
necessary to set the UPS aside for enough time (≥10 min) to release all charge before opening the UPS
chassis.
• The battery cables are not isolated with AC input. There may exist dangerous voltage between battery
terminal and grounding terminal. Pay attention to the insulation when installing and using the battery.
• Do not wear conductive objects, such as watches, bracelets and rings while handling the device.
• The installation professional should be qualified and have adequate knowledge of high voltage and
AC power operation. The maintenance and repair for the power system can only be done by
authorized professionals.
• Leakage risk. Before performing electrical connection, the UPS should be grounded. The ground
terminal must be connected to the ground.
WARNING
Drilling holes on the cabinet is prohibited. Inappropriate drilling will damage the
components inside the UPS. Metal debris generated by drilling will lead to short circuit of
the circuit board.
21
Note:
Changing the UPS configuration, structure or assembly will affect the
performance of the UPS. Please consult the manufacturer in advance if there is
such a requirement.