37
KEOR S 3-10 kVA
Oper
ating & I
nstalla
tion M
anual
In order to obtain longer autonomy time, you may add batteries in an external battery
cabinet. Depending on battery capacity, additional charger cards may be needed to
add to achieve ideal recharge time, please consult & contact to your authorized service.
Keor S 6-10kVA:
When the UPS is operated under CF50 or CF60 mode, the recommended load connected shall
be 75% of rated capacity if the input voltage is 176~280Vac and 50% of the rated capacity if
the input voltage is 160~280VAC.
Keor S 6-10kVA:
During Frequency Converter Operation, You must not switch Maintenance Bypass Circuit
Breaker (Q4) to “I” position!
Battery life depends on some parameters such as battery type, charge-discharge cycle, and depth of dis-
charge, ambient temperature, conditions. Please look at Appendix-3 Technical Specifications for the ideal
environmental conditions for the batteries. Using the batteries outside this temperature range will de-
crease battery operation time and battery life.
7.5.
Frequency Converter Operation (cF50 – cF60)
This mode is used when the load is different operating frequency of the mains frequency. For example; this
mode must be chosen to supply the load which requires 60Hz where the mains frequency is 50Hz.
Keor S 3kVA
The mains voltage is required to be in certain range for Bypass Operation. Bypass range is 176VAC~ 264VAC or
187VAC~264VAC (It can be adjustable). In case the mains is out of the limit it cannot switch to Bypass Operation
even if a fault occurs. If the batteries and the inverter are suitable to supply the loads, UPS switches to Battery
Operation.
Keor S 6-10kVA
The mains voltage is required to be in certain range for Eco and Bypass Operation. Bypass range is 187 – 259VAC.
In case the input voltage decreases below 187V or increases above 259V; if UPS runs in Eco Operation UPS switch-
es to Online Operation (norl); if UPS runs in Online Operation (norl) it cannot switch to Bypass/Eco Operation
even if a fault occurs. If the batteries and the inverter are suitable to supply the loads, UPS switches to Battery
Operation.
To return to Eco Operation; the mains voltage should return to under 242V or over 200V.
7.4.
Battery Mode
In this operation, energy is drawn from the batteries. The loads are supplied via inverter. Output voltage is sinu-
soidal and has a regulated amplitude and frequency. It is independent from the battery voltage. Battery voltage
should be in acceptable limits and the inverter should be enabled for the UPS to operate in this mode.
UPS operates in Battery Operation in the following cases:
• While UPS is operating in Online Operation or Eco Operation, if the rectifier is disabled or frequency/waveform/
rms value of mains voltage is not in acceptable limits.
• If the batteries are connected and UPS is started-up as COLDSTART, UPS runs in Battery Operation and supplies
the energy needed for the loads from the batteries.
Battery Management and Battery Back-Up Time
UPS charges the batteries when the mains voltage is between 160V - 288V (for 3kVA), 160V - 280V (for 6-10kVA).
Charging voltage is independent from the load.
Autonomy time depends on battery type, quantity, capacity, situation and load level. UPS stops supplying the
loads if the battery voltage decreases under a specific value.
