Datasheet

QUINT-PS/3AC/24DC/20
103132_en_00 PHOENIX CONTACT 13
Function
I [A]
OUT
U [V]
OUT
U
N
I
N
I<I
N
U<0,9xU
N
I>I
N
I
BOOST
Output characteristic curve
The power supply unit operates with the static POWER
BOOST power reserve as per the U/I characteristic curve
given in the figure. In case of ambient temperatures
T
amb
< +40°C, I
BOOST
is available permanently; it is
available only for a few minutes in case of higher
temperatures. In the event of a secondary short circuit and
overload, the output current is limited to I
BOOST
. Thereby, the
module does not switch off, but supplies a continuous output
current. The secondary voltage is reduced until the short
circuit has been remedied. The U/I characteristic curve with
the POWER BOOST power reserve ensures that high inrush
currents of capacitive loads and of consumers with DC/DC
converters in the input circuit can be fed reliably.
In order to trip the standard power circuit breakers
magnetically and thus very quickly, QUINT POWER supplies
six times the nominal current for 12 ms with the help of the
SFB technology. The defective current path is switched off
using this dynamic power reserve; consumers connected in
parallel continue to operate without an interruption. The error
is thus restricted and the important system parts continue to
operate.
The characteristic curve shows when I < I
N
, I > I
N
and
U<0.9xU
N
. The relevant signaling is given in the table.
U
N
= 24 V
I
N
= 20 A
I
BOOST
= 26 A
SFB technology = 120 A
P
N
= 480 W
P
BOOST
= 625 W
0
0
40 6020
I
BOOST
I
N
Ambient temperature [°C]
Output current [A]
Thermal behavior
With an ambient temperature of up to +40°C, the device
supplies the continuous output current of I
BOOST
. The device
can supply a nominal output current of I
N
with ambient
temperatures of up to +60°C. In the case of ambient
temperatures above +60°C, the output current must be
reduced by 2.5% per Kelvin increase in temperature. The
device does not switch off at ambient temperatures of +70°C
or thermal overload. The output capacity is reduced as far as
necessary to provide device protection. After it has cooled
down, the output capacity is increased again.