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6000 : Specification guide
Parallel UPS, three-phase, 250 to 3000 kVA*
* Power rating for an N+1 redundant configuration
APC By Schneider Electric Edition - 03/2009 Spec. E - 11
9 - Battery management
As the life of the batteries is very sensitive to operating conditions, the battery shall be managed in an optimum
manner.
In addition to the devices indicated in section 8.4 "Batteries", the battery-management system shall include the
features listed below.
9.1 - Self-test
The battery shall include a self-test system initiated in two manners:
ω as necessary by a manual command;
ω automatically at user-defined intervals.
This self-test system shall update the battery parameters and detect any abnormal deterioration to facilitate
preventive maintenance.
9.2 - Measurement of actual backup time
The battery function shall be combined with a system that continuously monitors the actual backup time available
(AC source present) or remaining (AC source absent), according to the actual load on the UPS, the battery
temperature and the age of the battery.
9.3 - Digital battery monitoring
Each UPS shall be equipped with a system for battery digital management.
Based on a number of parameters (percent load, temperature, battery type and age), the system shall control the
battery charge voltage and continuously calculate:
ω The true available backup time
ω The remaining service life.
9.4 - Block by block monitoring
To further optimise battery availability and service life, it shall be possible to equip each UPS with an optional
system to continuously monitor all battery strings and display a block by block failure prediction.
The system shall include the functions listed below.
ω Continuous measurement of the voltage of each block.
ω Continuous measurement of the internal resistance.
ω Identification of faulty blocks (trend curves).
ω Possibility of replacing individual blocks.
ω Remoting of all information via Ethernet, dry contacts or JBus.