Panasonic EBL128 - Main Power Source (Power Supply); Second Power Source (Battery)

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: - EBL128 Planning Instructions V2.0.x
168
I
TN
shall be < 0.5 A if the built-in batteries are 16 Ah, because this
results (theoretically) in a battery back-up time of 30 hours.
I
TN
shall be < 0.6 A if the built-in batteries are 18 Ah, because this
results (theoretically) in a battery back-up time of 30 hours.
Comments regarding (I
TA
):
I
TA
has to be < 1.8 A. See Figure 32, page 167.
Total EBL128 current consumption in relation to back-up time, see
the table in chapter "Second power source (Battery)", page 170.
24.3 Main power source (Power Supply)
The main power source is a Switching Power Supply (rectifier). The
technical data are 230 V AC / 24 V DC, 1.8 A, i.e. the total current
consumption incl. max. battery charging current must not at any
time exceed 1.8 A. Allowed input voltage is 176-264 V AC. The
output voltage is 24 V with a tolerance of ±1%.
163
24.4 Second power source (Battery)
The second power source are two 12 V batteries. Only batteries with
a specified "Final voltage" of 10.5 V must be used.
Find out the required battery back-up time
164
, both 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
N
)
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)
Normally you shall round up the calculated capacity and add 10% to
be on the safe side, because the battery voltage at the end of a
discharging period is not the same as at the start.
The following table shows the relation between the total current
consumption in normal state I
TN
and the back-up time.
I
TN
(A)
Back-up time (hours)
16 / 18 Ah battery
0.7
22 ¾ / 25 ¾
0.6
26 ½ / 30
0.5
32 / 36
0.4
40 / 45
0.2
80 / 90
163
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.
164
According to national regulations, customer demands, etc.