20
21
-1
1
40
Power Supply PS1000-A6-24.20
Application Notes
26.4
Parallel Use to Increase Output Power
Devices can be paralleled to increase the output power. The output voltage of all power
supplies shall be adjusted to the same value (±100mV) in
Single Use
mode with the same
load conditions on all units, or the units can be left with the factory settings.
After the adjustments, set the unit to
Parallel Use
mode, in order to achieve load sharing.
The
Parallel Use
mode regulates the output voltage in such a manner that the voltage at no
load is approx. 4% higher than at nominal load. See also chapter 8.
The ambient temperature is not allowed to 60°C.
If more than three units are connected in parallel, a fuse or circuit breaker with a rating of 30A
or 32A is required on each output. Alternatively, a diode or redundancy module can also be
utilized.
Energize all units at the same time. It also might be necessary to cycle the input power (turn-off
for at least five seconds), if the output was in overload or short circuits and the required output
current is higher than the current of one unit.
Restrictions
•
Keep an installation clearance of 15mm (left/right) between two devices and avoid
installing devices on top of each other.
•
Do not use devices in parallel in mounting orientations other than the standard mounting
orientation or in any other condition where a reduction of the output current is required
(e.g. altitude).
Pay attention that leakage current, EMI, inrush current will increase when using multiple
devices.
Figure 26.6 Parallel use to increase output power
