Vertiv Liebert APM2 - Advanced Battery Functions and Protection

6. EOD protection
When the battery voltage drops to the EOD voltage, the battery converter shuts down automatically and the
battery is inhibited to avoid further battery discharge. The EOD voltage is settable from 1.60 V/cell to 1.90 V/cell
(VRLA).
7. Battery low pre-warning time
The battery low pre-warning time is adjustable between 3 min and 60 min. The default setting is 5 min.
8. Maximum battery discharge time
When the battery has small current discharge for a long time, the battery is over discharged and even has
unrecoverable damage, thus setting a battery discharge time to protect the battery is essential. The limit of time
setting must be configured by service engineer through the Vertiv firmware setting.
9. Maximum boost charge protection time
To protect against the battery overcharge damage caused by long time boost charge, a protect time setting is
essential. The limit of time setting must be configured by service engineer through the Vertiv software setting.
7.1.2 Advanced function
Three different battery tests are available:
• Manual battery test
• Automatic battery test
• Calibrated battery test
Manual battery test
• Conditions required to perform the test:
• Battery at float charge for at least 5 h.
• 100% ≥ Load ≥ 0%
• Trigger:
• Manually through the GHMI.
• Effect:
• Discharging until battery capacity is 80%.
Automatic battery test
• Conditions required to perform the test:
• Battery at float charge for at least 5 h.
• 100% ≥ Load ≥ 20%
• Trigger:
• Automatically according to scheduling set.
• Effect:
• Discharging until battery capacity is 80%.
Calibrated battery test
• Conditions required to perform the test:
• Battery at float charge for at least 5 h.
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Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual