GE Industrial Solutions Galaxy Pulsar Edge - Manual (Page 127)

Galaxy Pulsar Edge Power System Controller
Issue 3 October 2011
127
In addition, the following alarms will be issued for the conditions noted. This assumes the
external disconnect switch is used to open and close the battery charging path to the batteries.
Condition Contact
or Fail
Alarm
Contact
or Open
Alarm
Open
String
Alarm
Edge
LED
QS871
LED
Open Integral QS871A Disconnect
Switch
X
RED
Blinking
AMBER
Battery reconnected in reverse
polarity
X X
RED RED
System started w/ reverse battery
polarity
X X
RED RED
Alarm Inputs: The QS871A is referenced to VBus(-), therefore, all alarm inputs are either
alarmed on an open or a closure to VBus(-) as described below.
• One input closure to VBus(-) for Remote LVD Open (RO) from external source (J3 pins 1
and 2)
• One input to Fuse Input Major alarm upon closure to VBus(-), for distribution protector
open alarms (J1 pin 7)
• One input to Open String alarm upon closure to VBus(-) for battery circuit breaker open
alarms (J1 pin8)
Reverse Battery Protection: The QS871A will prevent the closure of the battery contactor when
it senses batteries have been connected in reverse polarity. The QS871A will keep the contactor
disconnected and generate an appropriate alarm. When a battery disconnect breaker is used to
take battery strings off-line for servicing, care must be taken to ensure battery connections are
correct at the disconnect switch.
Manual LVD Contactor Connect: This feature allows the Infinity NE or any other power
system to resume powering the load after low voltage disconnect of batteries. Fully depleted
battery strings can be replaced with fully charged strings. Once the strings have been installed,
depressing the Manual LVD Contactor switch on the front of the QS871A module will result in
the LVBD contactor closing. Continue to depress the switch until the Green LED stops flashing
and displays a continuous green color. This indicates acceptance of the command and permanent
closure of the contactor. Releasing the switch prior to the continuous green LED will result in the
contactor opening and removing power to the load.
External Shunt Monitoring Input (J1 pins 4 and 5): The shunt must be in the VBus(-) leg to
maintain proper reference with the QS871A module. These inputs are for the system controller to
read battery or load currents. The polarity of the connections must be positive during battery
discharge.
Contactor Management: Controls and monitors one load or battery non-latching contactor.
Autonomous Backup LVD Function: Monitor system bus voltage for backup LVD function (in