Tyco Electronics Galaxy SC Controller J85501F-1
Issue 13 February 2001 Feature Descriptions 7 - 12
Note: For timed manual boost, the method of entering boost from the
EasyView software, the boost (or BTP) mode is initially disabled by
RFA, HFV, and HV alarms. The only method of entering boost (or BTP)
while these alarms are active is to enter boost via the front panel.
Timed Auto Boost:
Timed auto boost is a method of automatically recharging batteries after
a battery discharge. At the end of the discharge (battery on discharge
alarm retires), the plant will automatically recharge the batteries for a
time period that is a user specified multiple of the battery discharge
duration. The battery discharge (battery on discharge alarm) must last at
least four minutes before entering auto timed boost.
Quiescent Recharge Current Terminated (QRCT) Boost:
If the boost auto mode selected is QRCT, the plant will automatically
enter boost mode automatically if either of the following conditions
occur:
• Battery voltage drops below a user specified voltage threshold after
the first five minutes of the start of a battery discharge event or
• The total current flowing into or out of the batteries exceeds a user
specified current threshold.
For QRCT, a battery discharge event occurs when the sum of the battery
shunt currents exceeds 2% of the total shunt nominal full scale current
rating. The current is defined as the battery section current. Refer to the
battery section configuration for more details on configuration.
The plant will remain in boost mode until the first of the following
conditions occurs:
• Number of hours since the plant entered the boost mode has
exceeded the user specified value (This the timed manual duration
parameter; 0 indicates no time limit).
• The absolute value of the current gradient (slope) (change in
current/change in time) drops below a user specified value (0.00
amps/hour indicates no limit).
With QRCT boost, the plant will remain in boost for at least 45 minutes
while the controller gathers enough data to make exit calculations.
Note: If the plant is placed in boost mode for any reason, and the boost
auto mode of QRCT is selected, the plant may exit boost because of the
QRCT exit conditions.
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