inform ETR EVO Series, Installation And Operating Manual

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ETR EVO UPS User Manual (Ver. 1.0) Page 32
Battery Management and Battery Back-Up Time
As it is known, battery back-up can not be indicated with 100% accuracy, but approximation can be
done. Even UPS operates in Online or Bypass Operation; it continuously calculates and displays the
remaining back-up time. However the calculated values will be more healthier and accurate a few
minutes after the UPS switches to Battery Operation.
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
discharge, 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 decrease battery operation
time and battery life.
5.4. No Operation
This mode is used to make settings through Front Panel or by Service Software. To start-up UPS in No
Operation mode; all the circuit breakers must be at “0” position except F1 Input circuit breaker and
F4 Bypass circuit breaker- if exits -. In this mode UPS does not produce output voltage to supply the
loads.
In order to obtain longer autonomy time, you may add batteries in an external
battery cabinet.
When the mains voltage returns to normal conditions after Battery Operation, UPS
charges
the batteries for 10 hours and tests the batteries. This procedure is repeated after
each
Battery Operation. If Battery Test is successful, UPS resumes normal operation. If
not,
“Battery test failure” alarm is displayed on LCD.