text: <s>[INST] Power Flex 750 Series Drive Summary: Standard Life of 750 Series DriveDear Sir, Some of our clients will have a quarries that, what is your supplied drives standard life? We also think this is a valid question. If a plant used Power Flex 750 series drives only and they may used 50 -100 drives with various ratings then, they don't know when and which drive to be replaced and maintain their stock accordingly. You also understand that, all users try to maintain their minimum stock by which they may minimized their shutdown time. But till date you are not provided such a document by which any client know about that, this drive we purchase and it will work for ....... hours in standard operating conditions. You also mentioned the derating conditions of your supplied drives. Please rethink your consumer as, if any client purchase a drive by using several lakhs of rupees and they don't know how many days it will works in standard operating environment then, why they invest? If you have any authentic document then, please send to us. Hope to hear from you very soon. Regards Jhantu Kumar Das [/INST] First off, Mr. Das, this is a user-supported forum. It is not officially monitored by Rockwell employees. It is highly unlikely we can provide all the data you request here. I can provide some of it - you asked for derating data. The link below contains derating information based on ambient temperature and altitude: https://literature.rockwellautomation.com/idc/groups/literature/documents/td/750-td001_-en-p.pdf Have you contacted your local Rockwell sales representative for the expected life time data? Have you contacted Rockwell Technical Support? Those are the only two paths I can think of that might provide such data. I think you will find it difficult to get such data. You have not defined standard operating environment. My personal experience with PF750 drives is that they give years of reliable service. Failures are usually because of external factors - supply power surges and contaminated cooling air are the two most common. Motor overspeeds caused by external forces can also destroy drives. All three factors cause drive failures that should not be attributed to the drive. Please contact your local Rockwell representative; maybe they have data you might find useful. \\n </s>