Correct me if i am wrong, you said you are having problem with your three phase hydraulic supplies....and if it is true, are they fed through contactors? and again if it is true, then the option of the rotary UPS becomes to expensive and what you need would be to correct a quality of supply to...
Hi there,
this may help
? Performance and safety, IEC 62040-1, IEC 60950
? Performance and design, IEC 62040-3
? Design and manufacturing , IEC 60146
? EMC immunity, IEC61000-4
? EMC emissions, IEC 62040-2