Lucent Technologies Lineage
®
2000 25A Ferroresonant Rectifier J85502A-1
Issue 4 May 1998
Testing 6 - 9
6. Repeat Steps 4 and 5 for E14 and E2, E14 and E3, and
E14 and E4.
Current Limit
Test (Off Line)
1. Connect the test meter to positions 1 and 2 on TB3.
2. Strap a short across capacitor C24 on CM2. See Figure
6-3.
3. At I
load
= 25A, 100 to 101 percent of rated output current,
use the OUTPUT VOLTS ADJ potentiometer to adjust
V
out
to:
– 52.08 volts (48-volt rectifier)
– 26.04 volts (24-volt rectifier)
4. Remove strap from capacitor C24 on CM2. Observe that
V
out
is:
– 51.98 - 52.03 volts (48-volt rectifier)
– 25.99 - 26.01 volts (24-volt rectifier)
If not, see “Adjust Current Limit” in Section 7.
5. Increase the load to 27-28A, 110 ±1 percent. V
out
should
be below:
– 51.58 volts (48-volt rectifier)
– 25.79 volts (24-volt rectifier)
If not, see “Adjust Current Limit” in Section 7.
Notes
Adjust the current limit only after verifying that a current limit
problem exists.
V
out
is the voltage reading between the rectifier dc output
terminal and dc output return (ground). See Figure 5-2.
