Puls QS5.241 Power Supply Guia De Especificação
QS5.241, QS5.241-A1
Q-Series
24V,
5A,
S
INGLE
P
HASE
I
NPUT
24.7. P
ARALLEL
U
SE TO
I
NCREASE
O
UTPUT
P
OWER
23/26
Power supplies from the same series (Q-Series) can be paralleled to increase
the output power. The output voltage shall be adjusted to the same value
(±100mV) with the same load conditions on all units, or the units can be left
with the factory settings.
the output power. The output voltage shall be adjusted to the same value
(±100mV) with the same load conditions on all units, or the units can be left
with the factory settings.
If more than three units are connected in parallel, a fuse or circuit breaker
with a rating of 8A or 10A is required on each output. Alternatively, a diode or
redundancy module can also be utilized.
with a rating of 8A or 10A is required on each output. Alternatively, a diode or
redundancy module can also be utilized.
Keep an installation clearance of 15mm (left / right) between two power
supplies and avoid installing the power supplies on top of each other. Do not
use power supplies in parallel in mounting orientations other than the standard mounting orientation (input terminals
on bottom and output terminals on the top of the unit) or in any other condition where a derating of the output
current is required (e.g. altitude, above 60°C, …).
supplies and avoid installing the power supplies on top of each other. Do not
use power supplies in parallel in mounting orientations other than the standard mounting orientation (input terminals
on bottom and output terminals on the top of the unit) or in any other condition where a derating of the output
current is required (e.g. altitude, above 60°C, …).
Unit A
AC
DC
Unit B
AC
DC
-
+
-
+
Load
+
-
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
24.8. P
ARALLEL
U
SE FOR
R
EDUNDANCY
Power supplies can be paralleled for redundancy to gain higher system availability. Redundant systems require a
certain amount of extra power to support the load in case one power supply unit fails. The simplest way is to put two
power supplies in parallel. This is called a 1+1 redundancy. In case
one power supply unit fails, the other one is automatically able to
support the load current without any interruption. Redundant
systems for a higher power demand are usually built in a N+1
method. E.g. five power supplies, each rated for 5A are paralleled to
build a 20A redundant system. For N+1 redundancy the same
restrictions apply as for increasing the output power, see also
section 24.7.
certain amount of extra power to support the load in case one power supply unit fails. The simplest way is to put two
power supplies in parallel. This is called a 1+1 redundancy. In case
one power supply unit fails, the other one is automatically able to
support the load current without any interruption. Redundant
systems for a higher power demand are usually built in a N+1
method. E.g. five power supplies, each rated for 5A are paralleled to
build a 20A redundant system. For N+1 redundancy the same
restrictions apply as for increasing the output power, see also
section 24.7.
L N PE
+ +
- -
QS5.241
Power
Supply
Adj
Overload
DCok
24V,5A
Failure
Monitor
24V,5A
Load
optional
I
I
L
N
PE
L N PE
+ +
- -
QS5.241
Power
Supply
Adj
Overload
DCok
24V,5A
YR2.Diode
Redundancy
Module
+
-
OUT
+
-
IN 1
+
-
IN 2
Please note: This simple way to build a redundant system does not
cover failures such as an internal short circuit in the secondary side
of the power supply. In such a case, the defective unit becomes a
load for the other power supplies and the output voltage can not
be maintained any more. This can be avoided by utilizing
decoupling diodes which are included in the redundancy module
YR2.DIODE.
cover failures such as an internal short circuit in the secondary side
of the power supply. In such a case, the defective unit becomes a
load for the other power supplies and the output voltage can not
be maintained any more. This can be avoided by utilizing
decoupling diodes which are included in the redundancy module
YR2.DIODE.
Recommendations for building redundant power systems:
a)
Use separate input fuses for each power supply.
b)
Monitor the individual power supply units. Therefore, use the DC-OK relay contact of the QS5 power supply.
c)
It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.
Mar. 2013 / Rev. 2.2 DS-QS5.241-EN
All parameters are specified at 24V, 5A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
All parameters are specified at 24V, 5A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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