Hello!
I have a Dell Poweredge T20 attached to a new CyberPower 900PFCLCD true-sine UPS that (only sometimes) unexpectedly resets when I unplug the UPS to simulate a blackout under heavy PC load. Having a PC reset from a power outage while plugged into a UPS sort of defeats the purpose.
The PSU is a Liteon L290EM / (Huntkey HU290EM-01) PSU.
The computer at its maximum operating load consumes 250W at the wall which should be around 208W DC or ~75% of nominal PSU load and 40% of nominal UPS load.
Reading some reviews on this topic I suspect that the power supplies hold-up time at load is shorter than the transfer time of the UPS. I suppose I could replace the power supply but it has fairly high efficiency at low loads (77,5%@29W DC which is exactly what the Dell uses in 24/7 idle) which is a quality I haven't found in many other units that would fit in its place (ATX w/ max length 140mm).
The PSU has a 170μF/400V primary capacitor, is possible to tell whether this is sufficient for the 8-10ms transfer time that my UPS takes according to reviews? If this is well dimensioned, perhaps the UPS is faulty?
I have a Dell Poweredge T20 attached to a new CyberPower 900PFCLCD true-sine UPS that (only sometimes) unexpectedly resets when I unplug the UPS to simulate a blackout under heavy PC load. Having a PC reset from a power outage while plugged into a UPS sort of defeats the purpose.
The PSU is a Liteon L290EM / (Huntkey HU290EM-01) PSU.
The computer at its maximum operating load consumes 250W at the wall which should be around 208W DC or ~75% of nominal PSU load and 40% of nominal UPS load.
Reading some reviews on this topic I suspect that the power supplies hold-up time at load is shorter than the transfer time of the UPS. I suppose I could replace the power supply but it has fairly high efficiency at low loads (77,5%@29W DC which is exactly what the Dell uses in 24/7 idle) which is a quality I haven't found in many other units that would fit in its place (ATX w/ max length 140mm).
The PSU has a 170μF/400V primary capacitor, is possible to tell whether this is sufficient for the 8-10ms transfer time that my UPS takes according to reviews? If this is well dimensioned, perhaps the UPS is faulty?
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