Application notes
PS2031-2410-0000
32
Version: 1.0
The ambient temperature may not 60°C.
If more than three devices are connected in parallel, a fuse or circuit breaker with a rated current of 15A or
16A is required at each output. Alternatively a diode can be used.
Restrictions: Keep a mounting distance of 15mm (left/right) between two power supplies and do not install
the power supplies above each other. In parallel mode power supplies should only be used in the standard
installation position (terminals on the underside of the device), not in other installation positions or under
other conditions that require a reduction in the output current (e.g. installation altitude ...).
Remember that leakage current, electromagnetic interference, inrush current and harmonics increase when
using multiple power supplies.
Fig. 18: Parallel connection
4.6
Operation on two phases
No external protective device is required to protect against phase failure.
The power supply may only be operated continuously on two strands of a three-phase system if the output
power is reduced according to the curves shown below. Exceedance of these limit values over extended
periods leads to thermal shutdown of the device.
Fig. 19: Operation on two phases
Make sure the EMC performance, Hold-up time and losses are different from three-phase operation.
Therefore check the suitability of your individual application.
The use of only two strands of a three-phase system is not covered by the official approval. Therefore,
additional examinations may be required during the approval process of the final system.
