Tyco Galaxy SC Controller User Manual

Tyco Electronics Galaxy SC Controller J85501F-1
7 - 65 Feature Descriptions Issue 13 February 2001
The reserve time prediction algorithm monitors the following items for
predicting reserve time and provides alarms as indicated:
Temperature Probe Present:
This input allows Galaxy SC to recognize that the battery temperature
probe is present. If the temperature probe is present, then the prediction
algorithm is active; if removed the reserve time predictions will cease.
Battery Temperature:
This temperature is used as a one of the inputs for the plant reserve time
prediction. If the reading is blank, this indicates the controller thinks that
no probe is attached. The temperature information is available to the
user and may be used as a monitoring point. For example, using
temperature as one of the User Defined Events (UDE) can be used to
generate an alarm.
Plant Current:
The plant current is used in the algorithm calculations. The plant load is
compared with the sum of the rectifier currents to determine whether the
batteries are charging or discharging. During the charge phase, the
reserve time is predicted by adding the ampere-hours returned to the
batteries to the prediction. During the Coup De Fouet discharge phase,
the reserve time is predicted by subtracting the ampere-hours from the
prediction, and during the post Coup De Fouet discharge phase the
prediction is based on the adaptive algorithm. The reserve time
presented to the user is always a function of the present state of the
battery plant.
Sum of the Rectifier Currents:
The sum of the rectifier currents is used in the algorithm. The value is
valid when all rectifier types are configured, as they should be per the
installation instructions. The Galaxy SC calculates this value. The
algorithm subtracts the sum of the rectifier currents from the plant load
to determine the battery current and whether the battery is discharging
or charging.
Plant Voltage:
The reserve time prediction uses the plant voltage as the most important
value in predicting the reserve time during discharge. The monitored
plant voltage is the same as the battery voltage. The algorithm
normalizes the battery voltage by dividing the battery voltage by the
number of cells per string (12 for a 24-volt plant or 24 for a 48-volt
plant).
The following items are provided as user configurable parameters for
use in the reserve time prediction algorithm:

Tyco Galaxy SC Controller Specifications

General

Brand	Tyco
Model	Galaxy SC Controller
Category	Controller
Language	English