LEGRAND KEOR T EVO, Installation & Operation Manual

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4.2. Battery Mode
In this operation, energy is drawn from the batteries. The loads are supplied via inverter. Output voltage is
sinusoidal and has a regulated amplitude and frequency.
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; if frequency/waveform/rms value of mains voltage go beyond
the rectifier limits,
• While UPS is operating in Bypass Operation, if frequency/waveform/rms value of mains voltage go beyond
Bypass limits,
• If Inverter enabled: “YES”, Rectifier enabled: “NO” are selected through the front panel (Authorisations
Menu for authorized Service Staff).
KEOR T EVO UPS operates with one or several parallel strings of 1 x 60pcs 12VDC battery with common
neutral.
You may see the battery string connection as below;
+
-
n x 12-18 pcs n x 12-18 pcs
POSITIVE STRING
NEUTRAL
POINT
N
NEGATIVE STRING
Two Serial Strings with Central Point – Neutral Potential –
KEOR T EVO UPS operates with one strings of 24 to 36 x pcs 12VDC battery with common neutral
Battery Management and Battery Back-Up Time
When UPS operates in Online or Bypass Operation; it continuously calculates and displays the remaining
back-up time.
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.
Battery life depends on some parameters such as battery type, charge-discharge cycle, and depth of dis-
charge, ambient temperature, conditions. Please check Technical Specifications for the ideal environmental
conditions for the batteries. Using the batteries outside this temperature range will decrease battery opera-
tion time and battery life.