Lucent Technologies 415B Battery Plant for 4ESS
5 - 26 System Testing
Issue 6 September 1999
1. Place a load of approximately 50 amperes on the plant.
Turn off all rectifiers and verify that a BD alarm occurs.
Allow the BD alarm to exist for a minimum of 15 minutes.
2. Referring again to the Galaxy Controller product manual,
verify at the Galaxy front panel that a Battery Reserve
Time Prediction has been made. Record the predicted
reserve time.
3. Turn rectifiers back on and verify that the BD alarm is
retired.
4. After the BD alarm has been retired, verify that another
(higher) prediction has been made. Record the predicted
reserve time.
5. Provide the customer’s technician with the recorded data.
Enhanced
Ground Current
Monitor
(EGCM)
Once installed and powered, the Enhanced Ground Current
Monitor (EGCM) will display the current flowing through the
ground cable. If the ground current exceeds the upper or lower
alarm set points, an alarm will be initiated and the red alarm light
on the display will be illuminated. Alarms are not latching; if the
current drops below alarm limits, the alarm condition will clear.
There is a 250 msec time delay; transient conditions may trigger
alarms.
Checking and
Setting the
EGCM’s Offset
Control
Required tools:
•
Calibrated clamp-on dc current probe
•
Small slotted straight blade screwdriver (1/8”)
1. Use the calibrated clamp-on current probe to measure the
current flow in the ground lead.
2. Verify that the polarity of the current reading on both the
sensor and the clamp-on probe are the same.
3. Adjust the multi-turn offset control on the EGCM so that
the display and the current probe read the same current.
The offset control potentiometer is located on the front of
the control unit.
