APC Battery Management System User Manual download pdf (Page 176)

USER’S GUIDE

Battery Management System

169

Alarms

Fault Alarm Criteria

Fault LED Fault Criteria

Charger Voltage Low Charger Less than 2.1 volts per cell for lead-acid

batteries, or as set by user.

Charger Voltage High Charger Greater than 2.4 volts per cell for lead-acid

batteries or as set by user.

Shorted Cell Batteries Less than ((#Cells/Batt)-1) x (Vstring)

(#Cells/Batt) x (#Batt/String)

Blown Fuse/Open

Connections or Wiring

Management

Controller

Less than ½ volt on first or last battery in a

string or two consecutive batteries within a

string.

Low Capacity Batteries Any individual battery with more than 20%

lower voltage than the highest battery in

the same string during a discharge.

Thermal Runaway Batteries Greater than 20% more response current

than the benchmark, or greater than 95º F

battery temperature, or as set by the user.

Dryout/Sulfation/Opens Batteries Greater than 20% less response current

than benchmark, or as set by user.

High or Low Operating

Temperature

Environment Less than 50° F or greater than 95° F or as

set by the user.

High Ripple Current Charger Greater than 5 amps RMS per ampere-

hour or as set by the user.

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APC Battery Management System User Manual Page 176