Niveo Professional NUPS22-6000U - Manual (Page 5)

1-4. Connection Warnings
• There is no standard backfeed protection inside, please isolate the UPS before working according to this
circuit. The isolation device must be able to carry the UPS input current.
• This UPS should be connected with TN earthing system.
• The power supply for this unit must be single-phase rated in accordance with the equipment nameplate. It
also must be suitably grounded.
• Use of this equipment in life support applications where failure of this equipment can reasonably be
expected to cause the failure of the life support equipment or to significantly affect its safety or
effectiveness is not recommended. Do not use this equipment in the presence of a flammable anesthetic
mixture with air, oxygen or nitrous oxide.
• Connect your UPS power module’s grounding terminal to a grounding electrode conductor.
• The UPS is connected to a DC energy source (battery). The output terminals may be live when the UPS is
not connected to an AC supply.
1-5. Operation
Do not disconnect the earth conductor cable on the UPS or the building wiring terminals in any
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
- Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed