text: <s>[INST] Powerflex 525 - Phase loss. I want to ask if this setting “A557 phase loss detection” is parameter that can be used to detect phase loss on 3 phase motor . And if “phase loss treshold”  A576  is set good if default is 25% for induction motor . My power supply is 400Volt AC as for Europe , i was wondering if 25% phase loss treshold is good set for this kind of power supply , because american is 460 volt if iam correct. I just need it to do its job and detect the phase loss. I don't currently have a vfd to test it on, that's why I'm asking. [/INST] This parameter is used to monitor the output phases only. If an output is removed, there is a motor wiring issue or the voltage falls below the threshold the drive will trip on F021 Output Ph Loss. 25% of 400 is 100Volts so you would need to lose 300Volts on a phase to trip.\n </s>