SamplexPower SEC-4825BRM, Owner'S Manual

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24 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 25
SeCtION 6 | Operation
If AC input power fails, the DC load(s) will be instantaneously transferred to the external
48V backup battery and the battery will start discharging. When the battery is supplying
the load, the voltage seen at the Load Terminals will be 0.3V ± 0.1V less than the voltage
at the Battery Terminals. When AC input power is restored, the DC load will once again
be transferred instantaneously to the Power Supply Section and the external backup
battery will be recharged and kept in charged condition all the time at float Voltage of
54V to 54.6V.
SURGe PoWeR cAPABiLitY in Dc UPS BAtteRY BAckUP MoDe
When operating in DC UPS Battery Backup Mode (external 48V battery is connected),
the unit is capable of providing short term surge current determined by the Time versus
Current Characteristics of the load side fuse f2.
Current = the current limit value, will be provided by the Power Supply Section and
balance will be supplied by the battery.
During the period of this short term overload, the voltage seen by the load will
be = (battery voltage – 0.3V± 0.1V).
oPeRAtion AS noRMAL PoWeR SUPPLY WitHoUt eXteRnAL BAtteRY
If battery backup function is not used (external backup battery is not connected), the
unit will work as a normal power supply with ability to supply 25A continuous at 54.5V
± 0.3 VDC at the Load Terminals (
7A, 7B, fig 2.1
). The maximum overload current will be
limited to 30A. Under overload conditions, the output voltage will not be regulated and
will drop.
SeCtION 7 | limiting electro-Magnetic
Interference (eMI)
!
cAUtion!
Conducted and radiated noises in this unit are reduced to acceptable limits by appropriate
filtration.
This unit generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communi-
cations. However, this does not guarantee that interference will not occur in a particular in-
stallation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the measures recommended in the following
paragraphs.
Un-intentionAL RF noiSe GeneRAteD BY SWitcHeD
MoDe PoWeR SUPPLieS (SMPS)
Switched Mode Power Supplies (SMPS) employ high frequency switching and thus, are
a source of radio interference, a recipient of radio interference and a conduit of radio
interference. (older Linear Type, low frequency 50 / 60 Hz transformer based power