Overview
12
UPS 30-300kVA User Manual
Danger
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During Maintenance mode, dangerous voltages are present on the terminal of input, output
and neutral, even with all the modules and the LCD turned off.
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The UPS which without External maintenance switch in Maintenance Mode, dangerous
voltages are present on terminal and internal Copper bar.
1.4.5 ECO Mode
The economy control operation (ECO) mode is an energy-saving mode, In ECO mode,
when the bypass input voltage is within the ECO voltage range, the static bypass turns
on, andthe bypass supplies power, and inverter is standby. When the bypass
inputvoltage is beyond the ECO voltage range, the UPS transfers from bypass mode
to normal mode.
Rec�fier
AC/DC
Main
Sta�c Bypass
Manual Bypass
Inverter
DC/AC
Charge/
Discharge
Output
Ba�ery
Bypass
Figure1-7UPS conceptual diagram inECO Mode
Note
There is a short interruption time (less than 10ms) when transfer from ECO mode to battery mode,
it must be sure that the interruptionhas no effect on loads.
1.4.6 Auto-restart Mode
The battery may become exhausted following an extended AC mains failure. The
inverter shuts down when the battery reaches the End of Discharge Voltage (EOD).
The UPS may be programmed to “System Auto-Start Mode after EOD”. The system
starts after a delay time when the AC main recovers. The mode and the delay time are
programmed by the commissioning engineer.
1.4.7
FrequencyConverter Mode
By setting the UPS to Frequency Converter mode, the UPS could present a stable output of fixed
frequency (50 or 60Hz), and the bypass static switch is not available.