GE Industrial Solutions Galaxy Verification - Manual (Page 50)

Galaxy Power System Verification Procedures
3 - 6 Galaxy Millennium Controller Performance Verification Procedures Issue 3 January 2008
High Float Voltage Alarm Test
Introduction The High Voltage Alarm Test can be done by either raising the plant
voltage above the threshold set for HFV (High Float Voltage) or by
lowering the threshold for this condition to make it active.
Note: HFV is an alarm-only that can be used to notify users of an
impending HV condition before the need for a shutdown arises.
Raising the plant voltage on a working system is left to the discretion of
the user. This test could disrupt power to working equipment. If the test
is performed, verify that the plant is in FLOAT mode and that rectifier
voltage has been set to the normal level after completing the test.
Tests need to be done with batteries connected, or else when the
rectifiers shut down, the controller will also shut down.
Preparations Note the value of plant voltage from the Default screen. Use the
following table to record settings before beginning the test procedures:
Plant Nominal Float
Voltage
HV HFV
Testing High Float
Voltage Alarms
Step Action
1 From the front panel, follow the path → CONFIG
→ THRESH → HFV (FLOAT). Use the keys to
change the value of the HFV threshold to a level below the
plant voltage noted above. Press to save the
change.
2 Observe that the controller initiates a Power Minor alarm
(PMN) and illuminates the RECT and MIN LEDs.
3 Follow the path → CONFIG → THRESH →
HFV (FLOAT) and restore the threshold to it's original
setting. Press to save the change.