Exide Technologies Section 94.40 - Manual (Page 33)

OPERATING THE AT30
29
2.2.5. Testing the front panel indicators
•
Press the DOWN key. This is also the LAMP TEST key.
The meter will display 8888 , and all status & alarm indicators will light.
The LAMP TEST key does not test the
AC ON
indicator. The
AC ON
indicator lights whenever ac power is present, and the ac circuit breaker is
turned on. The
LAMP TEST key does not operate when ac power is off.
To test the action of the AT30 summary alarm relay, press and hold the
LAMP TEST key for four seconds to transfer the relay. If you are monitoring
the relay with a remote annunciator, it will detect the alarm condition.
2.2.6. Testing the Auxiliary Relay Board (optional)
If you have the optional Auxiliary Relay Board (A5) installed, you can
similarly test the six individual alarm relays. Press and hold the
LAMP TEST
key for four seconds to transfer the relays. If you are monitoring the
relays with a remote annunciator, it will detect the alarm conditions.
2.2.7. Interpreting the alarm indicators
There are six red alarm indicators at the right side of the front panel. An
indicator lights for each of the following alarm conditions:
• HIGH DC VOLTAGE: lights whenever the dc output voltage exceeds the
specified alarm voltage setting. See Section 2.3.4 to learn how to adjust the
HVDC alarm setting.
• LOW DC VOLTAGE: lights whenever the dc output voltage is below the
specified alarm voltage setting. See Section 2.3.4 to learn how to adjust the
LVDC alarm setting.
• DC OUTPUT FAILURE: lights whenever the charger cannot provide its full
rated output voltage
or its full rated output current. You cannot adjust this
alarm setting.
• AC INPUT FAILURE: lights whenever the ac power supply to the charger is
interrupted.
• POS GND: lights whenever leakage current from the battery positive terminal
to ground exceeds a specified threshold.
• NEG GND: lights whenever leakage current from the battery negative terminal
to ground exceeds a specified threshold.
NOTE: You can adjust the sensitivity of the ground fault detection
from 5K to 50k ohms. Adjusting the ground fault sensitivity affects
the positive and negative ground fault sensitivities equally.
When an alarm occurs, the indicators will light immediately. The AT30
also features a summary alarm relay with one form-C contacts (TB3) rated
0.5A / 125 Vac/Vdc. If an alarm condition lasts for 30 seconds or longer,
the summary alarm relay transfers. Under standard settings, when the
alarm condition is corrected, the corresponding relay and indicator resets
automatically. Latching alarm capability for the AT30 battery charger is
available, featured in a supplemental document (
JA5098-00
).