Safety Precaution
This manual contains information concerning the installation and operation of single UPS module and parallel
system of the Emerson NXC 30kVA and 40kVA UPS.
Read this manual thoroughly before installing, using and servicing 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
* IEC62040-3 Performance requirements and test methods
For details, refer to Chapter 11 Specifications.
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).
This equipment is installed with EMC filter.
Earth leakage current is 0 ~ 1000mA.
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.
RCCB which is sensitive to unidirectional DC pulse (class A) and insensitive to transient state current pulse must be selected.
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
The selection of the prestage distribution protection equipment of the UPS system must comply with the local electric
regulations.
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.
General safety precautions
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