35
KEOR S 3-10 kVA
Oper
ating & I
nstalla
tion M
anual
If the mains voltage and frequency are in certain range, Online Operation is possible. For the mains limits
for Online Operation, please see Appendix-3 Technical Specifications.
Online Operation Conditions;
• In case Online Operation (norl) is set as operation mode of UPS, the mains is within the limits and/or if
there is no abnormal condition (overheat, overload, failure…etc.) UPS operates in Online Operation. Except
for failures, as soon as the abnormal conditions are eliminated, UPS switches to Online Operation automati-
cally.
• In case Eco Operation is set as operation mode of UPS and the voltage and frequency is out of the bypass
limits but within the rectifier limits, UPS switches to Online Operation.
* It shows the UPS is operated in “Eco mode”.
To operate the UPS in Eco Mode, it must be chosen through the settings menu. UPS does not switch to Eco
Operation automatically. “Eco” is chosen as the operating mode hence UPS operates continuously in this
mode.
UPS switches from Eco Operation to another mode under the following conditions:
• In case of the mains voltage or frequency out of the limits of the bypass (UPS returns to Eco Operation
when the mains voltage or frequency turn back to within the limits of bypass).
• In case Online Operation (norl) is set as Operation mode through settings menu.
7.2.
Eco Mode (Eco)
In this mode, as long as the mains voltage and frequency within the limits, the load is supplied by the mains
in a controlled manner (the inverter is in standby state). The purpose of using this mode is to increase the
efficiency up to 98% and to provide energy saving; since the loads are supplied by the mains directly, the
loads are unprotected against any possible future risks. (e.g. surge voltage, etc.).
7.1.
Online Mode (norl)
Energy is drawn from the mains input. Loads are supplied through the rectifier and the inverter. The AC volt-
age at the input is converted to a DC voltage by the rectifier. The inverter converts this DC voltage to an AC
voltage with a stable sinusoidal waveform, amplitude and frequency. Output voltage is sinusoidal and has
a regulated amplitude and frequency. It is independent from the input voltage. The loads are not affected
by the negativities of the mains.
