Panasonic Electric Works Nordic AB
MEW01351
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
155
I
TA
has to be <
6.3 A
. (The battery charging will be turned off in
conjunction with fire alarm activated in the system.)
For the total EBL512 G3 current consumption in relation to
backup
time
, see tables in chapter "Battery (second power source)", page 155.
25.3
Rectifier (main power source)
The rectifier (5037) technical data is 230 V AC / 24 V DC, 6.5 A but
the main board fuse F1 = 6.3 A, i.e.
the total current consumption
incl. max. battery charging current must not at any time exceed
6.3 A
. Allowed input voltage is 176-264 V AC. The output voltage is
24 V with a tolerance of ±1%.
144
25.4
Battery (second power source)
Only batteries with a specified "Final voltage" of 10.5 V must be used.
Find out the required battery backup time, according to national
regulations / customer demands, in normal state and in alarm state.
Calculate the battery capacity required in normal state (
Q
N
) and the
battery capacity required in alarm state (
Q
A
) respectively.
Q
N
(Ah) = I
TN
(A) x battery backup time in normal state (h)
Q
A
(Ah) = I
TA
(A) x battery backup time in alarm state (h)
The total battery capacity
Q
=
Q
N
+
Q
A
(Ah)
The electrical capacity of the batteries varies with ambient
temperature and discharge current. Furthermore the battery voltage at
the end of a discharging period is not the same as at the start. For this
reason it is wise to round up the calculated capacity and add 10%, as
safety margin. Note! If the ambient temperature is below 20 °C the
safety margin has to be even larger since the electrical capacity of the
batteries decreases. At 0 °C add 30% and at 10 °C add 20% to the
calculated capacity.
The following tables show the relation between the total current
consumption in normal state (
I
TN
) and the backup time.
NOTE!
The values are calculated and will only give you a rough idea
of the backup time.
A battery < (24) 28 Ah
145
can be placed inside the control unit.
A battery > (24) 28 Ah has to be placed outside the control unit.
NOTE!
For external batteries the following is valid: Max. 3 m cable
length (min. 4 mm
2)
. National regulations have to be followed, e.g.
regarding external fuses etc. Also, the voltage drop has to be as low
as possible, not to affect the battery checking function.
144
The output voltage is factory set to 24 V. On the rectifier is a
potentiometer for output voltage adjustment (±10%) available.
Do not use
this potentiometer
unless the output voltage is not 24 V.
145
The battery's physical size is 175 x 165 x 125 mm.
