Appendix J: Battery Open Alarm - HindlePower AT30 SERIES Operating And Service Instructions

APPENDIX J
BACKGROUND
The AT30 can be configured to periodically test for an "open battery". This feature
allows the AT30 to periodically check whether the battery is capable of delivering sufficient
output current to satisfy required dc loads for 3 minutes. If the battery is extremely low on
capacity, or there is an open string, the Main Control PC Board (A1) will indicate an alarm,
alerting the user to capacity test the battery. The benefits of the Battery Open Alarm feature are
as follows:
• The test is programmed to run automatically for 3 minutes at 90-day intervals.
• The feature meets, or exceeds, compliance for "battery continuity confirmation"
as required by the North American Electric Reliability Corporation standard
NERC PRC-005.
• The test may be easily enabled and disabled on the Main Ctrl PC Board (A1).
ENABLING/DISABLING
Before enabling or disabling the Battery Open
Alarm feature, shut down the AT30 by opening both front
panel circuit breakers (CB1/CB2). Lock out all ac and dc
power from the AT30.
Open the front instrument panel door and confirm
no voltages are present inside the enclosure. Locate the
square Main Control PC Board (A1), mounted to the inside
surface of the front panel. Identify shorting jumper (J31),
located along the right edge of the board when viewed from
the back. Refer to the image on the right.
Move the shorting block onto J31 pins 1-2 to enable
the Battery Open Alarm feature. Move the shorting block
onto J31 pins 2-3 to disable Battery Open Alarm. Restart
the AT30 per Section 2.1.
FUNCTION
The AT30 Battery Open Alarm feature tests the battery at a fixed interval. The test runs
automatically every 90 days. The 90-day timer will reset (restart) under any of the following
conditions:
a) The timer will reset on an ac failure.
b) The timer will reset on Equalize (starts at the end of the equalize period).
c) The timer will reset if the Battery Open test is deactivated by jumper (J31).
d) The timer will reset when a previous failure (E 15 code) is reset.
e) The timer will reset if a manual test is initiated.
The Battery Open test runs for a fixed duration of 3 minutes. During the open test, the
AT30 lowers its output to 2 Volts below the LV Alarm point (see Setting the Low DC Voltage
Alarm on page 33). During the Battery Open test, the text ' tESt ' is indicated on the front
panel display. If the battery supports the standing load for the entire 3 minutes, the test will
conclude. The AT30 will return to the normal Float setting, and the Battery Open test will run
again at the next interval.
96
BATTERY OPEN ALARM