Luqa, The issue you are having may be due to the UPS output voltage being configured inappropriately in relation to the input voltage. The UPS allows a tolerance of +/-6% on the difference between the input and output voltage. When the incoming voltage is too high, the UPS inverter will 'buck' the voltage down to its preset level. Too low it will "boost". What you will need to do is adjust the output voltage setting on the UPS. This requires that the UPS's output be turned off (UPS in stand-by state) to complete this operation.  Let me know how it goes.
Hi guys. For last few weeks I experience a small "problem" with one UPS. [IMAGE] I was pinging UPS for last 24 hours and I didn't lost even one package. Event log from USP: Can you guys suggest me why this happens? /luca
Dell UPS Rack 2700W HV and problem with communication