Lucent Technologies Lineage
®
2000 25A Ferroresonant Rectifier J85502A-1
6 - 10 Testing
Issue 4 May 1998
6. Decrease the load to 24-24.5A, 96 to 98 percent of the
rectifier rating. Observe that V
out
is greater than:
– 52.03 volts (48-volt rectifier)
– 26.01 volts (24-volt rectifier)
Backup High
Voltage
Shutdown
(HVSD) Test
(Off Line)
1. If the DC OUTPUT circuit breaker is On, turn it Off
(down).
2. Disable the internal selective shutdown by moving the “Q”
(P15) or “T” (P16) movable straps on CM1 to the Charge
position (see Figure 6-2). Verify that moveable strap P14
remains in the 2-3 (NOT the Charge) position for this test
and after the rectifier is placed into service. The P14
Charge position is only used to raise the Backup HVSD
level of the rectifier when it is being used for applying the
initial charge to connected batteries.
3. Slowly turn the OUTPUT VOLTS ADJ potentiometer
clockwise until the rectifier shuts down. This should occur
between 32.25 and 33.50 volts (24-volt rectifier) or
between 63 and 66 volts (48-volt rectifier). The RFA LED
on the rectifier and the RFA lamp on the test set should
light.
When this step is completed, restore R21 or R22. If the
rectifier has List WB (external high voltage shutdown
option), leave straps “Q” and “T” on CM1, in the charge
position, (pins 1 and 2). If the rectifier is not equipped with
List WB, place “Q” and “T” in normal position (pins 2 and
3).
4. Turn the OUTPUT VOLTS ADJ potentiometer
counterclockwise.
Note
To increase the upper range of the voltage adjustment, do one or
both of the following:
•
Temporarily open the R- lead on the test box. (The lead
goes to P2A-2 on CM2.)
•
Short resistor R22 (24-volt version) or R21 (48-volt
version) on the CM1 board.
