WAGNER TITANUS, Technical Manual

Page: 85 / 208

TITANUS MICRO·SENS
®
Pipe Design
MS_A_04-en-e Data: 01/09
4 – 35
4.4 Power Supply
When sizing the power supply, the signal-ready status of the danger
alarm equipment and the alarm case are considered. When the plant is in
the signal-ready status, the power supply must deliver the idling current
to the air sampling smoke detection systems and guarantee charging of
the stand-by accus in accordance with DIN VDE 0833, Part 1
P18F
19
PT
.
The following formulae apply in case of alarm:
Power calculation In case of alarm the current is calculated by the following formula:
Room protection
. , . . ,
) (
max y powersuppl area max quiescent area max alarm room total
I n n I n I I
≤ − + ⋅ =
Equipment protection
power max. quiescent alarm equipment total
I n n I n I I
≤ − + ⋅ =
) (
The current for charging the accus is calculated by the following formula:
Charging current
24
8 , 0
nominal
charging
K
I
⋅
≈
max. y, powersuppl charging quiescent equipment total
I I n I I
≤ + ⋅ =
,
I
total
= total current of all connected air sampling systems [A]
I
power supply, max.
= max. supply current of the power supply unit [A]
n = total number of all air sampling systems connected to a
power supply unit
n
max area
= total number of all air sampling systems in the area with
the highest power consumption
I
alarm
= alarm current of an air sampling system [A]
I
quiescent
= quiescent current of an air sampling system [A]
K
nominal
= nominal capacity of the accumulators [Ah]
I
charging
= charging current of the accumulators (within 24 h 80% of
the nominal capacity) [A]
The higher figure of the total current calculated ( I
total
) is used to design
the power supply!
The power consumption of the TITANUS MICRO·SENS
P
®
P
can be found in
Chapter 3, "Technical Data".
TP
19
PT
80% charging in 24 hours
INSTRUCTION