Tripp Lite 9PX11KPM Eaton 9PX 8000 9PX 11000 9PX EBM 240V Installation and Use - Page 46

10. Glossary Bypass AC source Source supplying the bypass line. The equipment can be transferred to the bypass line if an overload occurs on the UPS output, for maintenance or in the event of a malfunction. Frequency converter Operating mode used to convert the AC-power frequency between the UPS input and output (50Hz -> 60Hz or 60Hz -> 50Hz). Low-battery warning This is a battery-voltage level indicating that battery power is low and that the user must take action to prevent the imminent break in the supply of power to the load. Backup time Time during which the load can be supplied by the UPS operating on battery power. Load Devices or equipment connected to the UPS output. HE mode Operating mode by which the load is supplied directly by the AC source if it is within the tolerances defined by the user. This mode reduces the consumption of electrical power Manual bypass Rotary switch controlled by the user, used to connect the loads directly to the AC source. Transfer of the load to the manual bypass enables UPS maintenance without interrupting the supply of power to the connected loads. Normal (double conversion) mode The normal UPS operating mode in which the AC source supplies the UPS which in turn supplies the connected loads (after electronic double conversion). Normal AC source Normal source of power for the UPS. Relay contacts Contacts supplying information to the user in the form of signals. UPS Uninterruptible Power Supply. Page 46 8-11kVA US_EN