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Safety Precaution
This manual contains important instructions that should be followed during installation and operation of this
Emerson NX Uninterruptible Power Supply (UPS for short).
Read this manual thoroughly before installing, servicing and using the UPS.
The UPS must be commissioned and serviced by trained engineers approved and qualified by the manufacturer
or its agent. Failure to observe this could result in personnel safety risk, equipment malfunction and invalidation
of warranty.
Warning
This UPS is a product for commercial and industrial application in the second environment. Installation restrictions or
additional measures may be needed to prevent disturbances.
Conformity and standards
This product complies with CE 2006/95/EC (low voltage safety) and 2004/108/EC (EMC), EMC standards of Australia and
New Zealand (C-Tick), and the following UPS product standards:
* IEC62040-1 General safety requirements for UPS
* IEC62040-2-EMC, Class C3 UPS
* IEC62040-3 Performance requirements and test methods
For details, refer to
Continued compliance requires installation in accordance with these instructions and the use of manufacturer approved
accessories only.
Warning: high earth leakage current
Earth connection is critical before connecting the input supply (including both mains supply and battery).
Earth leakage current exceeds 3.5mA and is less than 5000mA.
Transient and steady state earth leakage currents, which may occur when the equipment is started, should be taken into
account in the selection of instantaneous RCCBs or RCD devices.
Note also that the earth leakage currents of the load will be carried by the RCCBs or RCDs.
The equipment must be earthed in accordance with the local electrical authority codes of practices.
Warning: backfeeding protection
This UPS is fitted with a dry contact closure signal for use with an external automatic disconnect device (supplied by others)
to protect against backfeeding voltage into the incoming terminal through the rectifier or bypass static switch circuit. A label
must be added at the external incoming bypass supply disconnect device to warn service personnel that the circuit is
connected to a UPS. The text of the label has the following meaning: Risk of voltage backfeed! Isolate the UPS, then check
for hazardous voltage between all terminals including the protective earth before working on this circuit.
User serviceable components
All the equipment maintenance and servicing procedures involving internal access need tools/special key and should be
carried out only by trained personnel. The components that can only be accessed by opening the protective cover with tools
cannot be maintained by the user.
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