For the 400V 3-phase power supply, when one of the input phases fails, is the 24Vdc still present? Are there then any limitations on the output current in this case?

Delta's CliQ DIN Rail Power Supply 3-phase power supply can work without any power derating even with only 2-phase inputs. However, the 2-phase input voltage must be at least 360Vac (L-L). For higher powered models such as the 480W, the minimum 2-phase input voltage is 380Vac. On the higher side our power supplies can work up to 575Vac.You can use either L1-L2 or L1-L3 or L2-L3 terminals. This input will be 2-Phase with 1-phase missing.

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