Tyco Electronics Galaxy SC Controller J85501F-1
7 - 11 Feature Descriptions Issue 13 February 2001
voltage boost, or Battery Thermal Protection (BTP) may be used to
prevent thermal runaway on valve regulated lead acid batteries.
Circuitry external to the controller is necessary to provide this feature.
Because the plant voltage is increased or decreased during boost (or
BTP) modes, the Galaxy SC also provides two voltage thresholds for the
float and boost modes. Alarm thresholds that change going from float to
boost (or BTP) modes are the battery on discharge (BD), the high float
voltage (HFV) and the high voltage (HV) alarms. By default, the float
and boost mode alarm thresholds are identical, and each alarm threshold
must be changed prior to entering boost (or BTP), to avoid creating any
of these alarms.
If the plant is in boost (or BTP) modes, and a rectifier fail alarm (RFA),
HFV, or HV alarm occurs, boost mode is terminated. In addition, if an
RFA, HFV, or HV alarm is currently active, the only method of entering
boost is from the front panel. Boost and BTP modes are generally
prevented during these alarms in order to protect the rectifiers.
There are several different methods for entering boost or BTP modes.
The Galaxy SC supports the following boost (or BTP) methods:
Front Panel Boost:
From the front panel of the Galaxy SC, place the plant in boost (or BTP)
mode. Boost mode is entered even if there is an RFA, HFV, or HV alarm
active. The plant will remain in boost (or BTP) modes until the operator
manually takes the plant out of boost (or BTP) mode or future RFA,
HFV, or HV alarms occur.
External BTP Circuitry:
External battery thermal protection circuitry places the plant in BTP or
float mode. A software DIP switch enables and disables external BTP
boost.
External Timer Circuitry:
External timer circuitry places the plant in boost (or BTP) or float
modes. A software and hardware DIP switch enables and disables
External Timer boost.
With the addition of the Intelligent controller, the Galaxy SC provides
the following methods of entering boost:
Timed Manual Boost:
The operator from the T1.317 interface places the plant in boost mode
for the specified duration in hours.
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