Werbung
Uninterruptible DC-Power Supply
EA-UPS 724-18B
This uninterruptible DC-power supply is designed to
feed low voltage equipment which must continue ope-
rating in event of a mains supply failure as i.e. SPS-
controls, alarm equipment, supervision equipment,
telecommunication equipment etc. The unit is supplied
complete with a maintenance free, sealed accumulator
with an expected operational life of 3 to 5 years. Should
the unit run in emergency operation for a longer period
so that the danger of the batteries being damaged by
being run down arises then the unit will be automatically
switched off.
Technical description
The unit consists of a power supply / charging unit. On
mains operation the battery is kept fully charged and
the load is supplied by the power supply. In the event
of a mains failure the battery supplies the load without
interruption.
Should the unit run in emergency operation for a longer
period so that the danger of the batteries being damaged
by being run down arises then the unit will be automati-
cally switched off. This shut down is caused at a battery
capacity of approx. 20%.
Technical Data EA-UPS 724-18B
Input voltage
Output voltage
Output current
Efficiency total
Voltage regulation during
mains operation
Ripple
Backup time on 12A
with 1x BU 724-07A
Rated battery voltage
Rated capacity
Charging duration up to 80%
rated capacity
Operating temperature
Storage temperature
Weight
Dimensions (W x H x D)
Operation instructions
Installation
Before taking the unit into operation it is necessary to
inspect the housing, the controls etc. for signs of physical
damage. Save all packing materials until the inspection
is completed. If damage is found, notify the carriers
immediately. Our authorised representative also should
be notified. If any physical damage has been found, the
equipment should not be connected to the mains.
© EA-ELEKTRO-AUTOMATIK, D-41747 Viersen, Helmholtzstr. 31-33, Tel.: 02162-3785-0, Fax: 02162-16230
85...264V/ 47...63Hz
21...27V
18A
>87%
+0,5%
<200mV
pp
approx. 15min.
24V
6.5 Ah
approx. 8h
0....50°C
-30...70°C
2.8kg
250 x 133 x 120 mm
Servicing, repairs or calibrations must only be carried
out by trained engineers. The unit may only be operated
using a proper ly wired and grounded mains plug as the
grounding of the unit follows via the earth wire of the
power cable. The unit must be operated only on the
voltage stipulated on the type plate. If it is necessary to
change the fuse, it is imperative that it only be replaced
by one of same value and physical dimensions as the
original supplied fuse. The unit must be disconnected
from the mains whilst replacing the fuse.
The battery is protected with a fuse on the rear of the
unit. This fuse is removed when the unit is delivered to
protect the battery.
The load must be connected to the + and – output
terminals.
Operation
Before the unit is switched on the first time, the output
voltage of 24V may already be available on the output
terminals. Therefore be careful when connecting the
load.
When the battery unit is connected or the mains is sup-
plied the output can be switched on with pushbutton
"Output" or by an external contact.
Then the load is supplied with an output voltage of nom.
27V and a max. current of 18A.
The batteries are connected in parallel to the output. The
LED "Output" is lit, when the voltage is on the output
terminals.
On mains failure, the load is supplied from the batteries
without any interruption. When the mains returns the
load is supplied from the power supply and the batteries
are charged.
In case time of the mains failure is so long that the
battery voltage becomes too low, the output will be swit-
ched off to prevent the batteries from being completely
discharged.
The batteries are charged again as soon the mains
voltage returns. The output has to be switched on ma-
nually with the pushbutton "Output". The battery will be
charged immediately after mains returns.
In case the DIP switch "Automatik Reset" (factory setting
to "0") is set to "1", the output voltage will be available
immediately after mains returns.
Two isolated relay contacts are supplied to signal "Char-
ging voltage LOW" and "Battery voltage LOW".
"Charging voltage LOW" is activated below 25V output
voltage, in case of mains failure or defect.
"Battery voltage LOW" is activated below 23V (battery
level below 20%). These contacts may be loaded with
max. 60V/1A.
These alerts are also indicated via LEDs on the front.
4
Werbung
