Vertiv APM 0250kMK16FN02000, User Manual

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Battery mode
As shown in Figure 2.4 below, the operation mode in which the battery provides backup power supply to the loads through
the rectifier and inverter is called battery mode. Upon mains failure, the system will automatically transfer to the battery
mode with no load power interruption. When the mains is recovered, the system will automatically transfer back to the
normal mode without any manual intervention, and the power to the load will not be interrupted.
F igu re 2.4 Sch em atic diagram o f battery m o de
N o. D es crip tion
1 Rectifier
2 Inverter
3 Automatic Inverter switch
4 Output switch
5 UPS output
6 Battery
N O T E: B attery co ld start fu n ctio n is available fo r switch in g th e UP S o n fro m B attery (ch arged) m o de
directly du rin g m ain s failu re. T h erefo re, th e battery po wer su pply can be u sed in depen den tly to
im pro ve th e availability o f th e UP S.
Automatic restart mode
The UPS has automatic restart function. When the inverter shuts down because the mains fails and the battery discharges to
EOD voltage, if the mains is recovered, the UPS will restart automatically after a certain time of delay. This function and the
automatic restart type can be set by the service engineer authorized by Vertiv.
During the process of automatic restart time of delay, the UPS will charge the battery to protect against the power-off risk of
the load device caused by mains power failure.
If the automatic restart function has not been set, the user can manually start the UPS by pressing the RESET FAULT key
first and INVERTER ON key next.
2 Overview
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Vertiv™ Liebert® APM Plus User Manual