Smart Tower UPS 10-30KVA User Manual
Chapter 3 Operation
17
3.2.2 Battery Mode
Batteries provide back-up power to load through inverter mode is battery mode. The UPS automatically
switch to battery mode, and load power is not interrupted. After the mains returns, the UPS automatically
switches back to normal mode without any manual intervention, while the load power uninterrupted.
Note: UPS can also be started through battery (charged) mode via battery cold start function when the
mains failure. Therefore, the battery power can be used independently to improve the utilization rate of
UPS.
3.2.3 Auto-Start Mode
The UPS has auto boot function, and that is after a long time mains failure, the inverter shut down
when the battery reaches the End of Discharge voltage (EOD). The UPS may be programmed to “Auto
Recovery after EOD” after a delay time if the AC main returns. This mode and any delay time are
programmed by the qualified professionals
During the automatically delay boot process, the UPS will charge the batteries to prevent another
mains failure risks for load equipment in future.
3.2.4 Bypass Mode
In normal mode, if there is inverter failure, inverter overload or manually turn off the inverter, static
switch will switch to bypass power supply the load power will not be interrupted
3.2.5 Maintenance Mode
For UPS maintenance or repair, switch load through the manual switch the critical load power supply
will no be off.
Be aware that switch the UPS system to bypass power supply mode first, then remove the
anti-manipulation cover, rotate the handle to maintenance, then disconnect all the mains, bypass and
internal battery switches and the external battery cabinet switches.
Warning: Hazard wrong operation in maintenance bypass mode
After UPS transfered to operate in maintenance bypass mode, power modules and bypass modules
do not work ,there is no display on LCD, the input,output terminalsand the N bus are energized with
electricity.
3.2.6 ECO Mode
When choosing economical (ECO) mode, in most situations, the UPS double-conversion would be
forbidden for energy saving. In ECO mode, the load power supply priority provided by the bypass. When the
frequency and voltage of bypass power within normal range, load power provided by bypass; beyond this
range, the system will switch to output of inverter, but such would cause load power interruptions, the
interruption time is less than 3/4 cycle. For example, the frequency is 50Hz, the interruption time is less than
15ms; frequency is 60Hz, the interrupt time of less than 12.5ms.
3.2.
7 Frequency Converters Mode
UPS can be set as frequency converter mode, and it provides stable frequency output as 50Hz or 60Hz,
the input frequency range is 40Hz ~ 70Hz. In this mode, the static bypass is unavailable, and the battery
can be selected according to the actual requirements of battery mode.
3.2.8 Parallel connection redundancy mode
To increase the system capacity or reliability, or both increase the system capacity and reliability, we
could paralleled some number of UPS units directly, and each UPS will automatic load-sharing by its
internal parallel logic control. The capacity of a parallel operation system can be up to 6 units.