EFX48-xx Series with RM3-340/440 Installation and Operation Guide
12
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
isolating equipment will depend on local regulations and/or customer requirements. Please
ensure both are checked before commencing work.
• The dc power system MCBs are not a disconnect device. The dc power system must be
connected to a suitable upstream ac supply disconnect device such as Miniature Circuit
Breaker(s) (MCB) or fuses. This device must isolate both the phase and neutral conductors in
single-phase and three-phase connections, unless the neutral conductor is clearly identified.
• If the dc power system is to be installed in a location where the ambient temperature may
rise above 50ºC (122ºF), then 105°C rated cable rated cable must be used for all connections.
• The dc power system is not compatible with IT (Impedance Terra) ac power distribution
topologies. For advice see Worldwide Support section.
• A registered electrician (or suitably qualified person) must check the integrity of the
installed cabling, BEFORE the dc power system is powered up.
• Tasks must be performed in the sequence documented in this manual and accompanying
product manual.
Location and Environment
• A dc power system must be installed in a restricted access location, unless it includes
features to allow otherwise.
• For ease of access and to maintain optimum system cooling observe the clearances stated in
the relevant product manual.
• Dust build-up within the dc power system may cause premature failure. In dusty
environments filter the ventilation air entering the equipment room. Ensure regular cleaning
of the air filters.
• Do not allow water or any foreign object to enter the dc power system. Do not place objects
containing liquid on top of or near the unit.
• Flooded cell and VRLA lead acid batteries can emit explosive gases and must be installed
with adequate ventilation. Refer to the battery manufacturer, supplier, or power system
designer for advice on minimum ventilation levels.
Reverse Polarity
• Always check that the battery cables have been terminated to the correct system polarity
BEFORE connecting the batteries or closing the battery disconnect device. Connecting
batteries to the dc power system with incorrect system polarity will damage the rectifiers
and void all warranty claims.
Hazardous Energy Levels
• Rectifiers, converters and batteries contain hazardous energy levels. Only personnel trained
and experienced in dc power systems are to service/maintain this equipment.
• Always use insulated tools.
• Do not short-circuit the live and common bus bars or cables.
Batteries
• The plastic cases of batteries installed in Eaton dc power system racks must have a
flammability rating of UL 94-V2 or better.
• Flooded cell and VRLA lead acid batteries can emit explosive gases and must be installed
with adequate ventilation. Refer to the battery manufacturer or supplier for advice on
minimum ventilation levels.
• Do not wear a synthetic dust-coat or overalls. Synthetic fabrics can hold static electric
charges that create sparks during discharge.
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